PARAMICS Plugin - signal - University of California, Irvine
Contents
1. of the example network of this plugin is a good starting point to make your own input file in order to avoid editing problems 2 Can a phase in priorities file have no movement information 27 PATH ATMS Center Actuated Signal Control Plugin It is not good for a phase to have no movement information Every phase corresponds to a combination of NEMA phases if that phase is regarded to have vehicles and then a green signal will be given to that phase which has no movement allowed Then the plugin may be locked to that phase The solution is that you can repeat the movement information of a related phase Please refer to Section 4 3 6 3 Tools In order to speed up the process of coding actuated signals we also make two computer programs for the making of signal_control file and the priorities information You can request these tools from PATH ATMS center 6 4 Release notes Compare to the plugin used in PARAMICS version 3 this plugin has the following modification 1 Log signal txt is generated under the network directory after this plugin is loaded by PARAMICS This file is used to check if the signal_control file includes no invalid input and has been understood by this plugin correctly 6 5 Future development We plan to integrate the signal optimization software Synchro into PARAMICS Several plugins will be developed to convert a PARAMICS network into a Synchro network exchange data between PARAMI2. A icbuw detector2 icbss N A N A icbus detector3 icbse N A N A icbue detector4 icbsn N A N A icbun For the priorities file phase 1 2 and 3 have the same allowed movements actions 10 phase offset 0 00 sec phase 1 0 00 max 100 00 red phase 0 00 fill all barred except from 14 to 11 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 13 to 11 minor from 12 to 13 minor phase 2 0 00 max 100 00 red phase 0 00 fill 21 PATH ATMS Center Actuated Signal Control Plugin all barred except from 14 to 11 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 13 to 11 minor from 12 to 13 minor phase 3 0 00 max 100 00 red phase 0 00 fill all barred except from 14 to 11 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 13 to 11 minor from 12 to 13 minor phase 4 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 14 major from 13 to 12 major from 13 to 11 major from 11 to 14 minor from 14 to 12 minor from 12 to 13 minor phase 5 0 00 max 100 00 red phase 0 00 fill all barred except 4 3 2 1 amp 6 first and 2 amp 5 second The signal control file needs to be one of the following two movements 1 2 3 4 9 9 7 8 ini_green 5 10 5 8 0 0 5 8 extension 3 4 3 5 0 0 3 5 max_green 24 32 24 32 0 0 24 32 22 PATH ATMS Center recall 4 8 lanes 5 5 rightturn 0 1 detector1 icbsw N A detector2 icbss N A detector3 icbse N A
3. Nag 2 payenpy UON s seyd 31435 057 SauNnLVas 5 CM MEA ligGrezet ROSA pad SIEM Ped 8 9 7 Z DF SHED Pad PEIS SHED PEJS uy Buju PEIS saseyd pes dN day HES Ped Seu Buryse 4 84997 Z at s 5 ISYHd 5 66 72 9 S30aSuadNS 10 2 abed PATH ATMS Center 00 617 SONVHO ONIWIL 61 SWVYJYd C1 INS JO AND LYVLS ONISVHd NOLLOSSUSINI 185 YILNI ANIAU 2 32 PATH ATMS Center Actuated Signal Control Plugin APPENDIX 3 Geometric layout of the intersection DIFICATION PLAN RVINE CENTER DRIVE BARRANCA DETECTOR SYSTEM MO CA BARRAN IECTOJ Less ess e BEBE T 2 20200202205 npa m wi wily ace S 2000020020 Si SKI GI i Si ikii Ka sil d Sr e Zeg 3 es PATH ATMS Center Actuated Signal Control Plugin APPENDIX 4 Completed
4. detector4 icbsn N A movements 9 ini_green 0 extension 0 max_green 0 4 0 recall lanes rightturn 0 OO OD OO OO detector1 icbsw N A detector2 icbss N A detector3 icbse N A detector4 icbsn N A The corresponding priorities file is actions 10 phase offset 0 00 sec phase 1 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 14 major from 13 to 12 major from 13 to 11 major from 11 to 14 minor from 14 to 12 minor from 12 to 13 minor phase 2 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 14 major from 13 to 12 major from 13 to 11 major from 11 to 14 minor from 14 to 12 minor N A N A N A N A 2 0 icbuw icbus icbue icbun Actuated Signal Control Plugin 23 PATH ATMS Center Actuated Signal Control Plugin from 12 to 13 minor phase 3 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 14 major from 13 to 12 major from 13 to 11 major from 11 to 14 minor from 14 to 12 minor from 12 to 13 minor phase 4 0 00 max 100 00 red phase 0 00 fill all barred except from 14 to 11 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 13 to 11 minor from 12 to 13 minor phase 5 0 00 max 100 00 red phase 0 00 fill all barred except 24 PATH ATMS Center Actuated Signal Control Plugin 5 PROGRAMMER capabilities 5 1 Interface functions Interface functions have been pr
5. in Figure 2 we modeled 16 detectors for a typical intersection in PARAMICS and each detector covers all lanes of a link For each approach there are three detectors close to the stop line for through and left turn vehicle presence detection and one advance detector located at about 150 300 feet to the stop line for detecting vehicles for the extension of the through movement phase For stopline detectors all three of them employ the vehicle presence of left turn lanes the two detectors close to the stop line are used for detecting the presence of through vehicles Due to improvements in the long loop detection in a later versions of PARAMICS later than Build V 3 0 7 we can use one long loop instead of three stopline loop detectors for vehicle presence As a result we only need to model 8 detectors for an intersection That is to say detectors 1 5 9 and 13 are long loops with a typical length of 50 feet and there is no need to code detectors 2 3 6 7 10 11 14 and 15 This is our recommended method to model detectors of an actuated signal intersection In version 4 of PARAMICS detectors can be lane specific This plugin does not support the use of this type of detector 2 3 Pseudo code The pseudo code for the main control logic of this plugin is given as follows 1 Actuated Signal plugin set up using api_setup includes signal data input memory allocation and initial signal phase set up 2 At every time step net_action
6. is called For controller intersection 1 n a Inquiry the current signal information using signal_inquiry b If left green time 0 Amber and red time are counted If amber and red time are reached Set the next signal phase parameters through signal_action else vehicle presence detection presence dection excute the current signal plan pp_excute_plan If left green time lt extension amp amp vehicle presence for extension amp amp expired green lt maximal green extension green time increased by extension left green PATH ATMS Center Actuated Signal Control Plugin If left green time lt time step Find the next phase by vehicle presence PATH ATMS Center Actuated Signal Control Plugin 3 Step by step user manual 3 1 Data preparation The data input to this plugin is the signal timing plan the geometry and detector information of actuated signal intersections If the purpose of simulation is to model a real world network the following information is required in order to make actuated signals 1 Signal Timing Chart obtained from the proper government agency 2 Geometric layout of the intersection the best source of this information is usually from as built plans If the purpose of simulation is to evaluate an intersection design or test signal timing plans you can obtain the signal timing from traffic signal software such as SYNCHRO based on historica
7. setting is required 1 In the workspace of your plugin that wants to use these interface functions specify the library file actuated_signal lib of the actuated signal plugin as an input object library module The path of actuated_signal lib should be specified as well 2 Specify the prototype of the interface function at the beginning of your plugin as follows _declspec dllimport void uci_signal_set_parameters Signal sig _declspec dllimport Signal uci signal get_parameters char nodeName 26 PATH ATMS Center Actuated Signal Control Plugin 6 Technical Supports 6 1 Limitations of this plugin 1 During our development on this full actuated signal control plugin we found that PARAMICS did not provide a plugin function for users to control the amber time yellow light Although yellow time can be set in the configuration file it is a universal parameter for all the intersections and all the time It is not convenient in the actuated signal case since some phases may be skipped the amber time has to be skipped at the same time In order to simulate the real world better our developed plugins have to have a handle on the control of the amber time associated with each phase 2 In PARAMICS phase and movement are different For the current actuated signal plugin implementation each phase usually includes two major movements and some minor movements For instance phase 1 may include dual left turn movements and
8. some right turn minor movements PARAMICS runs through phase 1 to phase 8 some phases may be skipped depending on the vehicle presence However each movement has its own initial green and extension in the signal timing sheet Only one set of parameters could be used in each phase Although a reasonable set of parameters is calculated and used during the simulation and doing this does not hurt the simulation performance the actual signal control cannot be fully simulated in this plugin Ideally we want each phase to include only one major movement and two phases can be executed at the same time Version 4 of PARAMICS provides users with this capability but we do not have time to implement this at the current time 3 Only one timing plan for each intersection is supported by the current plugin In order to support multiple signal plans please use another plugin multiple actuated signal plan together with this plugin 4 In version 3 of PARAMICS vehicles may stop at stop lines because of routing problem such as a through vehicle stopping on a left turn lane Version 4 has bot this problem because it introduces the re routing feature 6 2 FAQ 1 Grammar of input files Unlike the parser system of PARAMICS which allow flexible grammars and comments the format of the input file of this plugin is rigid and thus any problem in the file may cause the plugin not work well Our recommendation for users is that the input file
9. 00 fill all barred except from 7510 to 7511 minor from 7511 to 7612 minor from 7511 to 7510 major from 7612 to 7614 minor from 7614 to 7612 major from 7614 to 7510 minor phase 2 0 00 max 100 00 red phase 0 00 fill all barred except from 7510 to 7511 minor from 7511 to 7612 minor from 7511 to 7614 major from 7511 to 7510 major from 7612 to 7614 minor from 7614 to 7510 minor phase 3 phase 8 0 00 max 100 00 red phase 0 00 fill all barred except from 7510 to 7511 minor from 7510 to 7612 major from 7511 to 7612 minor from 7612 to 7614 minor from 7612 to 7510 major from 7614 to 7510 minor In this example the movements of each phase are major while all right turns are minor We set the default signal time of each phase as 0 sec This is the reason that we 13 PATH ATMS Center Actuated Signal Control Plugin cannot edit these actions information through GUI The plugin will assign a certain length of time to each phase based on the presence of vehicles Then update the above priorities information of the corresponding signalized node in the priorities file of the network Please note that the network with modified priorities file must use together with this actuated signal plugin Without this plugin all movements of those actuated signal intersections are in red light 3 6 Loading plugin After the completion of the signal control file and the update the priorities file yo
10. 16 minor from 1610 to 299 major from 299 to 1533 minor from 299 to 1610 major from 1533 to 1610 minor phase 5 0 00 max 100 00 red phase 0 00 fill all barred except from 1416 to 299 minor from 1416 to 1610 major from 1610 to 1416 minor from 299 to 1533 minor from 1533 to 299 major from 1533 to 1610 minor phase 6 0 00 max 100 00 red phase 0 00 fill all barred except from 1416 to 299 minor from 1416 to 1533 major from 1416 to 1610 major from 1610 to 1416 minor from 299 to 1533 minor from 1533 to 1610 minor phase 7 0 00 max 100 00 red phase 0 00 fill all barred except from 1416 to 299 minor from 1610 to 1416 minor from 299 to 1533 minor from 1533 to 1416 major from 1533 to 299 major from 1533 to 1610 minor phase 8 0 00 max 100 00 36 PATH ATMS Center Actuated Signal Control Plugin red phase 0 00 fill all barred except from 1416 to 299 minor from 1416 to 1533 major from 1610 to 1416 minor from 299 to 1533 minor from 1533 to 1416 major from 1533 to 1610 minor 37 PATH ATMS Center Actuated Signal Control Plugin APPENDIX 6 Loading plugins in PARAMICS In version 3 of PARAMICS the method to load a plugin is to specify the path and the name of the plugin in the plugins file located at Program Files Paramics plugins windows The grammar of this file is D Program Files ParamicsV4 uci_plugins actuated_signal dll Note there should be a ENTER at the end of the file Otherwise the la
11. 26 6 Technical SOPPOTES EE 27 6 1 Limitations of banaue eegenen 27 FAQ 27 aa aa a ah ae rasa ada claw 28 64 Release Notes EE 28 6 5 F t re developm nt TEEN 28 6 6 Contact EIER ee 28 eg 28 APPENDIX 30 APPENDIX 2 Signal Timing Chart i 31 APPENDIX 3 Geometric layout of the intersection 33 APPENDIX 4 Completed worksheet for the example intersection 34 APPENDIX 5 The priorities information for the example intersection 35 APPENDIX 6 Loading plugins in 1 38 PATH ATMS Center Actuated Signal Control Plugin 1 Introduction Generally modes of traffic signal operation can be divided into three primary categories USDOT 1996 pre timed actuated and traffic responsive PARAMICS can basically model the fixed time signal control Besides PARAMICS also provides a plan phase language i e a kind of script language to simulate some simple actuated signal control logic However in the field the widely used actuated signal controller uses the complex NEMA logic or type 170 logic Our experiences found this script language is difficult to be used to model these types of complex control schemes and to replicate these schemes to multiple signal
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13. CS and Synchro and interactively optimize signal timing plans as PARAMICS simulation is running in the front 6 6 Contact information Any comments and suggestions are welcome Please contact us at the email address Ichu translab its uci edu 6 7 References 1 W R McShane R P Roess and E E Prassas 1998 Traffic Engineering Second Edition Prentice Hall 2 Liu X Chu L and Recker W 2001 Paramics API Design Document for Actuated Signal Signal Coordination and Ramp Control California PATH Working Paper UCB ITS PWP 2001 11 University of California at Berkeley 28 PATH ATMS Center Actuated Signal Control Plugin 3 USDOT Federal Highway Administration 1996 Traffic Control Systems Handbook 29 PATH ATMS Center Actuated Signal Control Plugin APPENDIX 1 Worksheet Location Signal ID d Direction L approach _ approach approach _ Dr a 8 2 S Node Movement 1 2 3 4 5 6 7 8 Initial Green Extension Max Green Recall Phase Lanes Right Turn lanes Detector 1 Detector 2 Detector 3 Detector 4 30 Actuated Signal Control Plugin PATH ATMS Center Chart iming APPENDIX 2 Signal T YHON 1 unos Ped 8 UNOS YHON SWA abeg SST 1X3 SEET 93 A 19 295
14. PATH ATMS Center Actuated Signal Control Plugin PARAMICS Plugin Document Actuated signal Control Lianyu Chu Henry X Liu Brian Smolke Will Recker PATH ATMS Center University of California Irvine Plugin Compatibility V3 V4 Release date 12 23 2003 522 Social Science Tower Irvine CA 92697 3600 URL http www its uci edu a PATH ATMS Center Actuated Signal Control Plugin Table of Contents SPAS GE Contents EE 2 CE 3 2 PIAS tie ee 4 2 1 Control TEE 4 2 2 Modeling vehicle detection Eeer 5 23 PSCUAG E 7 Step by step Ser E 9 EE ECAP ALOU ele 9 3 2 Adding detectors and checking network coding 9 3 3 Preparation of worksheets ee deer eer deer dee H 3 4 Preparation of signal control Die 11 3 5 Preparation of priorities 1 11 3 6 Loading e a a Ra wanes 14 3 7 Error CHECKING neon unde n E 14 Dn Re EE 14 4 Working with different phasing seguenceg 16 4 e CEET 16 4 2 Thr gh FER 18 4 3 How to split phases using the Actuated Signal Plugin 20 5 PROGRAMMER ET 25 3 1 Interface functions a 25 5 2 How to use interface functions in other plugins
15. al controller better the order and sequence of phases can also be altered The detailed description on how actuated signal works can be found in the textbook by McShane et al 1998 Ring 1 5 Mm WBL EBT NBL SBT c gt E L gt EBL WBT Ring 2 SBL NBT Left side of barrier Right Side of barrier E W Movements N S Movements Barrier Figure 2 Dual ring concurrent phasing scheme with assigned movements 2 2 Modeling vehicle detection The vehicle detection is an important part of the actuated signal system There are three groups of detectors in each approach for the typical intersection in the real world 1 Stopline detectors located in the through lanes and very close to the stop line for the presence detection of through vehicles There may be 2 3 presence detectors for a lane that are typically about six feet by six feet in size 2 Advance loop detector located at almost 150 300 feet from the stop bar used to detect vehicles for the extension of the through movement phase and 3 Long loop detector for left turns with the length of about 50 70 feet for the presence detection of left turn vehicles In some cases a set of individual detectors are used instead of a single long one For some intersections there may be no advance detector at some approaches of an intersection If presence detectors are on
16. as shown in Figure 8 4 7 6 7 27 3 8 Figure 8 Phase layout of a signalized intersection In the signal control file the two phases on the lead leg need to be put to the columns of movement and movement 5 If we want to make link 14 10 as the lead leg the phase sequence will be 2 amp 5 gt 1 amp 5 gt 2 amp 6 gt 1 amp 6 the corresponding signal_control file needs to be configure as follows The real world controller may not have the phase combination of 1 amp 5 Our plugin cannot avoid having it But its existence does not have any negative but positive influence on the operation of the control logic 16 PATH ATMS Center Movements 2 1 ini_green 10 5 extension 4 3 max_green 32 24 recall 4 8 lanes 2 2 rightturn 1 1 detector1 icbsw N A detector2 icbss N A detector3 icbse N A detector4 icbsn N A N A N A N A N A 1 icbuw icbus icbue icbun Actuated Signal Control Plugin 5 6 7 8 5 10 5 8 3 4 3 5 24 32 24 32 2 2 2 3 Based on phase sequences 2 amp 5 gt 1 amp 5 gt 2 amp 6 gt 1 amp 6 the priorities file needs to put 2 amp 5 to phase 1 1 amp 5 to phase 2 2 amp 6 to phase 3 and 1 amp 6 to phase 4 actions 10 phase offset 0 00 sec phase 1 0 00 max 100 00 red phase 0 00 fill all barred except from 14 to 11 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 13 to 11 minor from 12 to 13 minor phase 2 0 00 max 100 00 red phase 0 00 fill al
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18. djacent nodes on four approaches 3 Find NEMA movement number 1 generally a left turn from the Signal Timing Chart Write down the turn arrow and the movement number 1 As a result all NEMA movements phases can be determined based on the definition of the standard NEMA phases movements shown in figure 1 Write down all NEMA movements on the worksheet 4 Write down the approach number on the worksheet The approach that the 1st NEMA movement locates is defined as approach 1 here The counter clockwise approaches around the junction are defined as approach 2 3 4 5 Fill out the 3 5 rows Initial green Extension Max green of the table on the bottom of the worksheet The ini_green corresponds to the Initial green time and the max_green corresponds to the Max Green in the Signal Timing Chart 6 Find out the recall movement from Signal Timing Chart Enter the two recall movement numbers into the first two columns of the recall row 7 Find out how many lanes correspond to each NEMA movement from layout of the intersection or PARAMICS environment Fill them in the row of lanes in the worksheet The first value in the row corresponds to the number of lanes for NEMA movement and the second value corresponds to NEMA movement 2 etc In many situations there are lanes that are shared by different movements For example one lane may allow both left turning and through vehicles to pass In this ca
19. ection 5 7 3 8 Exercises 14 PATH ATMS Center Actuated Signal Control Plugin APPENDIX 2 3 shows the Signal Timing Chart and Geometric layout of the intersection ICD amp BARRANCA Based on Section 2 2 we filled in the worksheet shown in APPENDIX 4 Based on this worksheet the signal_control information 15 shown in Section 3 4 Its priorities information is shown in APPENDIX 5 This plugin can be used to model more complex actuated signal control through proper configurations of the priorities and signal control information Users can learn more from one of our example Irvine networks which includes 37 actuated signals 15 PATH ATMS Center Actuated Signal Control Plugin 4 Working with different phasing sequences In dual ring operation full actuated signal controllers are capable of a number of phase sequences between barriers For each of the two major phase groups there are three basic phase sequences 1 Left turn first 2 Lead leg left turns and 3 Through movement first The developed full actuated signal plugin can work with all three sequences We have described how to work with the left turn first case in the previous section This section will discuss how to make the plugin to work under the second and third phase sequences Please refer to the example networks for further understanding this section 4 1 Lead leg left turns The layout of a typical intersection is
20. he PARAMICS GUI However for the actuated signal the file priorities must be edited directly with a text editor We need to generate the priorities information of an actuated signalized intersection based on the worksheet we made on step 2 in which the node names of adjacent nodes of an intersection have been written down Figure 6 is an example of the node designations for a four legged intersection approach 1 is considered to be in the direction starting at node 7511 and heading towards the junction node 5287 Figure 6 Intersection Layout The priorities for a four legged full actuated intersection will have eight phases As illustrated in Figure 7 Phase 1 will correspond to the situation where the left turning NEMA movements and 5 will be given the green Phase 2 will account for the situation where movements 5 and 2 will be given the green and phase 3 will be for movements 1 and 6 Phase 4 will be for the through movements 2 and 6 The last four phases will follow the pattern of the first four phases starting with the left turn movements 3 and 7 Figure 7 Eight phases of the four legged full actuated signal intersection For the intersection in the previous figure the definition of phases and actions movements in priorities file would be 12 PATH ATMS Center Actuated Signal Control Plugin actions 528z phase offset 0 00 sec phase 1 0 00 max 100 00 red phase 0
21. irectory An example of the signal_control file is shown in Figure 5 The first line of this file specifies the number of actuated signals modeled in the network The remainder of the file contains the signal timing information The information in this file has a very similar format to that of the worksheet There are two signals modeled in Figure 5 The first one uses 16 detectors and the second used 8 detectors total number of actuated signals is 2 node 1167 ICD amp BARRANCA movements 1 2 3 4 5 6 7 8 ini_green 5 5 5 8 amp 5 5 5 8 extension 3 4 3 5 3 4 3 5 max_green 24 32 24 32 24 32 24 32 recall 4 8 lanes 2 0 2 0 2 0 3 0 2 0 2 0 2 0 3 0 rightturn 1 0 1 0 1 0 1 0 detector icbsw icb2w icb3w icbuw detector2 icbss icb2s icb3s icbus detector3 icbse icb2e icb3e icbue detector4 icbsn icb2n icb3n icbun node 147 BARRANCA amp SAND CNYN movements 1 2 3 4 5 6 7 8 ini_green 5 8 585858 extension 2 52 9 2 3 2 55 max_green 20 24 20 32 20 24 20 32 recall 2 6 lanes 2 0 2 0 2 0 2 0 2 0 2 0 2 0 3 0 rightturn 1 0 0 5 1 0 1 0 detector bscsw N A N A bscuw detector2 bscss N A N A bscus detector3 bscse N A N A bscue detector4 bscsn N A N A bscun 3 5 Preparation of priorities information The priorities file defines what movement can be allowed under each phase of an intersection For pre timed signal control the priorities information can be edited through 11 PATH ATMS Center Actuated Signal Control Plugin t
22. ized intersections A plugin was created to more easily model actuated signal control within PARAMICS This report discusses the logic of this plugin as well as its implementation PATH ATMS Center Actuated Signal Control Plugin 2 Plugin implementation 2 1 Control logic The layout of a typical actuated signal intersection is shown in Figure 1 1 I I N Presence detector EE m Figure 1 Typical Intersection Layout The control logic that is implemented in the plugin is for an eight phase dual ring concurrent controller actuated signal The dual ring concurrent concept is illustrated briefly in Figure 2 Note that eight phases are shown each of which accommodates one of the through or left turning movements A barrier separates the north south phases from the east west phases Any phase in the top group Ring 1 may be displayed with any phase in the bottom group Ring 2 on the same side of the barriers without PATH ATMS Center Actuated Signal Control Plugin introducing any traffic conflicts For simplicity the right turns are omitted and assumed to proceed with the through movements In fully actuated signal control all phases at an intersection are actuated Therefore the length of each phase and consequently the cycle length will vary with each cycle Some phases may be skipped if there is no vehicle actuation To simulate the re
23. l barred except from 13 to 12 major from 14 to 11 major from 11 to 14 minor from 13 to 11 minor from 14 to 12 minor from 12 to 13 minor phase 3 0 00 max 100 00 red phase 0 00 fill all barred except 17 PATH ATMS Center from 13 to 14 major from 13 to 11 major from 14 to 13 major from 14 to 12 major from 11 to 14 minor from 12 to 13 minor phase 4 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 14 major from 13 to 12 major from 13 to 11 major from 11 to 14 minor from 14 to 12 minor from 12 to 13 minor phase 5 0 00 max 100 00 red phase 4 00 fill all barred except Actuated Signal Control Plugin If we want link 13 10 as the lead leg signal control will be movements 1 2 ini_green 5 10 extension 3 4 max_green 24 32 recall 4 8 lanes 2 2 rightturn 1 1 detector1 icbsw N A detector2 icbss N A detector3 icbse N A detector4 icbsn N A 3 5 3 24 2 1 N A N A N A N A 4 8 5 32 3 1 icbuw icbus icbue icbun 6 5 7 8 10 5 5 8 4 3 3 5 32 24 24 32 2 2 2 3 The corresponding proiorities file will not be listed here Users can easily figure out 4 2 Through movement first Based on the description of the last section we can deduce that the phase 2 and 6 should be put to the location of the columns of movement 1 and movement 5 18 PATH ATMS Center Actuated Signal Control Plugin As shown in the below figure if we want phases 2 and 6 go first the following phase
24. l traffic patterns 3 2 Adding detectors and checking network coding Based on the discussion in Section 2 2 we can either code 16 detectors or 8 detectors to a four legged actuated signal intersection The exact set back distance of the advance detector can found in the Geometric layout of the intersection The following geometric information needs to be checked 1 Number of lanes for each approach 2 Lane use information at intersections for example at an approach of an intersection which lanes are assigned to the left turn through or right turn movements If the default lane configuration is not the same as that shown in the Geometric layout of the intersection the corresponding intersection needs to be re coded via the PARMICS Modeller GUI Node gt Modify junction or by editing the junctions file manually 3 3 Preparation of worksheet Running MODELLER zoom in to the intersection Fill out a worksheet that includes geometry and signal timing information of the intersection The worksheet has been attached in APPENDIX 1 of this document The following is a list of necessary information in the worksheet 1 Write down the name of the intersection i e Alton amp ICD and the signal ID that is shown in the first page of signal timing chart PATH ATMS Center Actuated Signal Control Plugin 2 Write down the two street names the direction and the PARAMICS designation of the junction node and the four a
25. ly placed on the minor cross street the signal has semi actuated control To better simulate the functionality of detectors ideally detectors should be modeled in PARAMICS according to the real world configuration However in Build 3 of PARAMICS detectors are not lane specific A detector covers all lanes of a link and thus a PARAMICS detector represents a detector station Therefore we cannot model a PATH ATMS Center Actuated Signal Control Plugin separate long loop for left turn use in the actuated signal system As a result we use three small detectors instead of a long loop as shown in Figure 3 31 2 ft lt or 9 5 m 12 9 ft tor 4m Stop line LI 7 495 _________ 15 Figure3 Modeling the left turn long loop detector 8 Approach 2 EEEE 6C 1 5 N 1 L gt 1 4 CH S 3 4 16 Figure 4 Typical Intersection Layout in PARAMICS with NEMA phases PATH ATMS Center Actuated Signal Control Plugin Three 2 m or 6 6 ft detectors are used to mimic one 504 long loop detector These detectors model the stopline presence detectors as well as the left turn detectors The default length of detectors in PARAMICS is 2 meters or 6 6 feet The lengths of these detectors in PARAMICS do not match the common real world length of six feet but for the purposes of simulation this works fine As illustrated
26. ovided by this plugin for external modules to acquire and change the default timing plan This plugin provided a couple of interface functions for external plugin modules to acquire the current signal timing plan and set a new timing plan to a specific signal An advanced signal control algorithm plugin can be further developed based on them The prototypes of these interface functions are shown below Signal uci_signal_get_parameters char nodeName Function Querying the current signal timing plan of a specific actuated signal Return Value The current timing plan of an actuated signal Parameters nodeName is the name of the signal node Signal is the structure of actuated signal data whose definition is type Signal intersection name and location char node char controllerLocation signal parameters int movements 8 float maximumGreen 8 float minimumGreen 8 float extension 8 float storedRed 8 float phaseGreenTime 8 float movementGreenTime 8 current phase information int currentPhase int expiredTime float redTimeLeft Bool cycleEndFlag Void uci_signal_set_parameters Signal sig Function Setting a new timing plan to a specific signal Return Value None Parameters sig stores the new timing plan 25 PATH ATMS Center Actuated Signal Control Plugin 5 2 How to use interface functions in other plugins These two interface functions can be called in other plugins The following
27. s will be 2 amp 6 gt 1 amp 6 gt 2 amp 5 gt 1 amp 5 The signal_control file should be movements 2 1 3 4 6 5 7 8 ini_green 10 5 5 8 10 5 5 8 extension 4 3 3 5 4 3 3 5 max_green 32 24 24 32 32 24 24 32 recall 4 8 lanes 2 2 2 3 2 2 2 3 rightturn 1 1 1 1 detector1 icbsw N A N A icbuw detector2 icbss N A N A icbus detector3 icbse N A N A icbue detector4 icbsn N A N A icbun For the priorities file we can just put 2 amp 6 1 amp 6 2 amp 5 and 1 amp 5 to the phase 1 2 3 and 4 as shown below actions 10 phase offset 0 00 sec phase 1 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 11 major from 13 to 14 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 12 to 13 minor phase 2 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 11 major from 13 to 14 major from 13 to 12 major from 11 to 14 minor from 14 to 12 minor from 12 to 13 minor phase 3 0 00 max 100 00 19 PATH ATMS Center Actuated Signal Control Plugin red phase 0 00 fill all barred except from 14 to 11 major from 14 to 12 major from 14 to 13 major from 11 to 14 minor from 13 to 11 minor from 12 to 13 minor phase 4 0 00 max 100 00 red phase 0 00 fill all barred except from 13 to 12 major from 14 to 11 major from 11 to 14 minor from 13 to 11 minor from 14 to 12 minor from 12 to 13 minor phase 5 0 00 max 100 00 red phase 4 00 fill all barred except 4 3 Split pha
28. se the lane will count both as one through lane and as half 0 5 of a left turning lane 8 From the layout find out how many right turn lanes for each approach 1 gt 4 Please refer to the definition at step 4 for the definition of approaches 1 to 4 Write down these numbers in the row of Right turn lanes As in the case of lanes that allow both left and through movements lanes that allow through and right turn movements will count as one through lane and one half of a right turning lane 9 The row of detector 1 to detector 4 should be filled with the name of detectors the sequence is from stopline detectors to the advance detector seen in figure 1 on approach 1 to approach 4 Please refer to the definition at step 4 for the definition of approaches 1 to 4 In some cases one or more of the detectors for an approach does not need to be modeled Each missing detector needs to be specified as N A in the worksheet In Paramics v3 0 build 6 it was necessary to place three separate detectors at the stopline to ensure proper detection However build 7 of Paramics 3 0 and all later versions only need one long detector To allow reverse compatibility it still might be desirable to place three separate detectors 10 PATH ATMS Center Actuated Signal Control Plugin 3 4 Preparation of signal control file The plugin requires a file titled signal_control to be in the PARAMICS network d
29. ses Except the above mentioned cases users may need to make signals work under split phases For example there are only two possible phase combinations 1 amp 6 and 2 amp 5 in the first phase group Under this situation the signal timing chart from the local transportation agency may provide phase information which may not make this plugin work as expected 4 3 1 2 amp 5 first and 1 amp 6 second The signal control file can be configured as movements 2 1 3 4 9 9 7 8 ini_green 10 5 5 8 0 0 5 8 extension 4 3 3 5 0 0 3 5 max_green 32 24 24 32 0 0 24 32 recall 4 8 20 PATH ATMS Center lanes rightturn detector1 detector2 detector3 detector4 5 0 icbsw icbss icbse icbsn 5 1 N A N A N A N A 2 0 N A N A N A N A 3 1 icbuw icbus icbue icbun Actuated Signal Control Plugin There is no phase 5 and 6 Only phases 1 and 2 exist Note that movement i e phase 1 includes all lanes of link 13 10 and phase 2 includes all lanes of link 14 10 no matter the lane is reserved for left turns or through movements We can also configure the signal control file in another way i e without phases 1 and 2 but with phases 5 and 6 as shown below The previous phase goes to phase 6 and the previous phase 2 goes to phase 5 movements 9 9 3 4 6 7 8 ini_green 0 0 5 8 10 5 5 8 extension 0 0 3 5 3 3 5 max_green 0 0 24 32 32 24 24 32 recall 4 8 lanes 0 0 2 3 5 5 2 3 rightturn 0 1 0 1 detector1 icbsw N A N
30. st plugin will not be loaded Version 4 of PARAMICS introduces a network specified method to load plugins Each network has a programming file which contains the plugins used together with the network If you put this plugin in the PARAMICS root directory where you can find other Quadstone s plugins including HOV Loop aggregator and Monitor you do not need to specify the path of this plugin in the programming file actuated_signal dll If this plugin is stored to a directory other than the root directory of PARAMICS the path of the loaded plugin need to be specified Program Files ParamicsV4 uci_plugins actuated_signal dll Note PARAMICS thinks this plugin is in Drive C only If you put this plugin to Driver D or others PARAMICS will not find the plugin In addition note that no drive can be specified in this programming file The following format will not be identified by PARAMICS as a valid plugin input D Program Files ParamicsV4 uci_plugins actuated_signal dll If you prefer to put this plugin to Driver D or others you have to use the way of version 3 of PARAMICS to load plugins 38
31. u can load the simulation network together with this plugin The names of this plugin files are actuated_signal dll Modeller Plugin actuated_signal p dll Processor Plugin Run simulation and then you will see that this plugin is used to emulate the actuated signal control at specified intersections via GUI 3 7 Error checking If there is any mistake happened in the signal_control file the plugin will be disabled The report window of PARAMICS will show whether this plugin is working This plugin generates a file named Log signal txt under the network directory which can be used to check if the signal control file has been understood by this plugin correctly The detector information in the signal_control file is connected with the priorities information of the signal intersection The mismatch of them may cause the signal work abnormally Two methods can be used to judge if the actuated signal control has the correct logic 1 Based on the observation from GUI Node gt Modify junction gt Signal display or 2 Making a long time simulation run and then check if there are any serious congestion happened at actuated signal intersections If an actuated signal control is not working correctly all input files need to be double checked for any mistakes The correct use of this plugin depends on your knowledge of signal control If necessary please have a look at related chapters in the textbooks listed in S
32. worksheet for the example intersection Location Borda 10 Signal ID_143 Direction 9 1 approach lt approach approach 4 GEET Initia Green 5 lt S 5 5 s Extension 13 e TAS Green Ia 32 24 32 24 32 2 Recall Phase 5 CT CL O Detector iCbsw __ ichb3w Detector2 ___ ich ss 100265 ich3s Perata 34 PATH ATMS Center Actuated Signal Control Plugin APPENDIX 5 The priorities information for the example intersection actions 1167 phase offset 0 00 sec phase 1 0 00 max 100 00 red phase 0 00 fill all barred except from 1416 to 299 minor from 1610 to 1416 minor from 1610 to 1533 major from 299 to 1416 major from 299 to 1533 minor from 1533 to 1610 minor phase 2 0 00 max 100 00 red phase 0 00 fill all barred except from 1416 to 299 minor from 1610 to 1416 minor from 299 to 1416 major from 299 to 1533 minor from 299 to 1610 major from 1533 to 1610 minor phase 3 0 00 max 100 00 red phase 0 00 fill all barred except from 1416 to 299 minor from 1610 to 1416 minor from 1610 to 299 major from 1610 to 1533 major from 299 to 1533 minor from 1533 to 1610 minor phase 4 0 00 max 100 00 red phase 0 00 fill 35 PATH ATMS Center Actuated Signal Control Plugin all barred except from 1416 to 299 minor from 1610 to 14
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