Computer exercise 1 – Description
Contents
1. 23 00 DD Turning Probability 0 3 Average Speed Total vehicles 0 i PJ stopped vehicles Mark a section in the box at the top of the dialog Then mark an entrance section in Entrances Specify any entrance flow in Entrance Flow Mark a destination in the box Turnings and specify the turn Page 6 12 proportion in Turning Probability Continue with the next destination and then choose the next Entrance The needed turn share and in flow data is available in the table below Remember to specify the turn proportions for all Entrances for all sections Section 2 has for example 3 entrances Section 1 5 7 and 2 destinations 1 e 6 inputs has to be specified for Section 2 1 2 21 1 2 23 7 2 21 7 2 23 5 2 21 and 5 2 23 From section To section Share In flow From section To section Share In flow 1 16 17 0 33 1 16 19 0 07 1 i 16 12 0 60 2 23 0 71 18 12 0 88 530 3 4 18 15 0 03 3 6 20 12 0 73 3 8 i 20 15 0 06 295 4 9 20 17 0 21 4 21 25 0 65 4 21 27 0 35 5 6 20 23 0 13 5 8 22 3 0 87 5 2 24 3 0 71 139 7 8 0 15 24 21 0 29 7 2 0 22 189 26 27 0 76 186 7 4 0 63 26 22 0 24 9 27 29 0 30 9 27 33 0 15 27 10 0 55 28 22 0 44 28 25 0 56 30 33 0 01 30 10 0 90 747 30 28 0 09 32 37 0 29 32 16 0 71 36 16 0 19 36 31 0 81 40 10 0 00 40 28 0 28 40 29 0 72 Save the state Result Save State and set the start time to 07 in the dialog box Save Network State Close t2. 200 0 70 0 150 0 10 0 20 0 0 00 80 0 30 0 20 0 40 0 20 0 180 0 30 0 20 0 60 0 0 00 30 0 400 20 0 50 0 40 0 100 0 30 0 20 0 120 0 20 0 0 00 Appendix 2 The network Appendix 2 Appendix 3 The network including centroids 15 17 Appendix 3 Appendix 4 Detector numbering Appendix 4
3. Auto Evaluate Warning None Optional Initial Current Cost Function InitialCost2 InitialCost4 CurrentCost2 CurrentCost4 InitialCost3 Page 4 12 1 right 32 1 32 1 left 36 3 36 3 15 3 15 5 right 5 5 left 7 7 7 27 27 27 30 right 30 30 left 4 right 40 4 right 40 4 left 40 10 right 9 right 10 right 9 10 left 9 left 12 right 12 right 26 12 left 26 14 right 28 14 right 28 14 left 21 21 AN ON OD LD Ff 11 right 11 22 11 left 22 16 24 16 24 16 2 18 right 2 18 18 left 20 20 20 Driving behavior differs between different intersections and different countries Some drivers enter an intersection even though they know that they will not be able to leave it within for example the current green period Intersections in which the opposite hold 1 e m which drivers do not enter if they are not able to leave should be modeled as a Yellow box intersection Change intersection 5 to a Yellow box intersection Traffic AIMSUN offers two possibilities for modeling vehicles route choices either by using turn proportions or by using an OD matrix together with a route choice model We start by modeling the route choice by turn proportions Page 5 12 Start by creating a so called result container Result New Result Container and save it Result Save Result Container as It is possible to specify different turn proportions for different vehicle types This network
4. Turn autogrid on and View Show grid There are several tools available for coding the network the following is an explanation of the buttons Page 1 12 Select Rotate gt r I EYES Selection by area Zoom Section Polysection Intersection Junction Centroid Controller Bus Line Bus Stop Detector VMS t EES 015 EH LA Ramp Metering There are also tools for editing the graphical representation of the environment T O O a 2 Each section intersection and centroid is numbered to show these numbers do View Show Objects and click in the ZD column for sections junctions and centroids If succeeded Yes should appear in the box you clicked Task 1 Turn proportions Code the network The fictitious network that you will work with is available both below and in appendix 2 A suggestion is to separate the appendix from the rest of this instruction so that you can easily look at it without having to turn page Sections m The section button is used to code draw the sections road segments It will be much easier to complete the exercise if you code the sections in the order as they are numbered in the picture below It is possible to change the ID number afterwards by double clicking on a section and editing the ID box It is not possible to change to an ID number that already is used thus it can take awhile to adjust the numbers afterwards Page 2 12 It is possible to
5. is assumed to only carry cars Define the vehicle type car Result Vehicle Types by creating a new vehicle type New and name it Car Change to the Parameter tab and add the following data Deviation Length Width Max Desired Speed Max Acceleration Normal deceleration Max deceleration Speed Acceptance Min Distance Veh Give Way time Guidance Acceptance Guided vehicles 0 00 Cruising Tolerance 0 80 m s The inflow to the network and the turn proportions vary between different times during Inflow and turn proportions for a specific time period are specified in a State Result New State As Empty Choose Result Sections For each section is it possible to specify Entrance flow This is however of interest only for sections at the edge of the network It is also possible to specify turn proportions Turning Probability 1 e how large proportion of vehicles on the section that will turn right left and straight forward It is possible to use different turn proportions depending on which section that the vehicles came from Section Entrances when entering the present section One has to specify the Turning Probability for each combination of Section Entrances and Dest Sections in Labi State EJ CK Cancel 5 Show All Sections Section Entrances vehicle Types Entrance and vehicle Type Entrance flow 0 0 veh Turnings Dest Prob speed Total stopped
6. marked using bold font e g save the network File Save as Selection or marking of radio buttons or check boxes or writing values in edit boxes will be marked with italic font e g set the lane width to 3 5 meters by writing 3 5 in Lane Width Examination You have to solve task 1 3 in order to pass the exercise Present your solutions to the supervisor at the end of the scheduled class Settings in TEDI Start by open up the TEDI program there is a short cut on the start menu under program GETRAM v4 2 Before starting to code the network some vital settings have to be done Start by creating a new drawing area File New and save the network File Save as Remember to save continuously during the computer exercise to avoid loss of data Another important thing to keep in mind is that writing in some edit boxes has to be completed with ENTER in order for the value to be saved Set standard values for lane width and road type e Lane width Edit Preferences Sections and set Lane Width to 3 5 meter e Road type Edit Preferences Sections Types and choose Street as default type by marking Street and Default Type Street will now be marked as default Yes in the last column Limit the drawing area to 300x300 meter Edit Preferences Network Drawing Area and set Bottom left to 0 0 and Top right to 300 300 Choose a suitable distance between the grid points e g 1 0 meters The coding gets much easier with the grid turned on View
7. ITN LINKOPINGS TEKNISKA HOGSKOLA TNK082 Johan Janson Olstam amp Andreas Tapani 1 21 08 Computer exercise 1 Modeling in AIMSUN 2 AJ Computer exercise 1 Description This computer exercise is an introduction to the traffic simulation tool AIMSUN 2 The tool consists of an editor called TEDI and a simulation environment called AIMSUN 2 During this exercise you will get familiar with creating simulation models using the network editor TEDI Besides the instructions in this document there is also a Get started guide available under Transport Simulation Systems GETRAM v4 2 Manuals A complete user manual is available under stud dir s in the directory GETRAM manualer which also can be reached via internet at http www student itn liu se kursmaterial GETRAM 20Manualer In this exercise a model over a fictitious network is to be created The traffic flow in the network will be modeled using both turn proportions and by an OD matrix The exercise consists of 3 obligatory tasks and 2 optional tasks The first task is to code the network and to model route choices using turn proportions The second task is to model route choices using an OD matrix instead of turn proportions The third and last obligatory task is to add traffic signal control to one intersection The optional tasks are to try to model a vehicle actuated traffic signal and to code a roundabout Menu and tab choices will in this document be
8. ab and choose min in the Recall drop down list Set the Passage time to 0 1 seconds and the Time before reduce equal to the max green time 1 e 25 and 23 for phase 1 and 2 respectively Repeat the settings procedure for the second phase Some explanations Passage time is the time that the green time is extended with for each vehicle passage If not all detectors in a phase should extend the green time with the same amount of time the Extension time can be used to get a detector to extend the green time with Passage Time Extension Time The Min Recall setting implies that the phase always runs at least the minimum green time The No Recall setting implies that the phase only runs 1f a vehicle has been detected during the red time Additional task Roundabout There is no roundabout tool available in AIMSUN 2 Roundabouts are instead modeled by using several sections and linking them together with the junction tool Start from the network in task 3 Save it with another name File Save as Mark junction 2 and press delete Create the roundabout according to the figure below Page 12 12 Appendix 1 OD matrix 2 3 4 5 6 7 8 9 60 0 0 00 70 0 180 0 30 0 20 0 200 0 80 0 30 0 10 0 15 0 0 00 5 0 20 0 5 0 20 0 5 0 20 0 60 0 100 0 60 0 0 00 30 0 20 0 100 0 100 0 10 0 30 0 50 0 15 0 50 0 0 00 20 0 20 0 30 0 10 0 Appendix 1 15 0 20 0 5 0 15 0 5 0 0 00 15 0 10 0 25 0 70 0
9. copy sections and to change direction of already created sections Section Change Direction Multi lane sections are created by first creating a single lane section and then changing the number of lanes by Section Number of Lanes You can also use the short key CTRL n where is the desired number of lanes Section 14 has an extra lane for left turning vehicles at intersection 2 This lane is created by grabbing the second black box from the right and dragging it upwards until the extra lane appears see the following illustration The length of a section can also be adjusted by first marking high lighting the section and then putting the mouse in the middle between the two black boxes at the end of the section The mouse pointer should now change to a circle click and drag using the left mouse button to change the length Page 3 12 5 The curved sections can be coded by using the polysection tool LE Click where you want the section to start and then click at every point you want the section to turn and double click to mark the end of the section It is also possible to create polysections by creating single sections and then high lighting them in the correct order and use Sections make polysection The speed limit for a section can be changed by double clicking on the section and changing Maximum speed under the Basics tab The sections 15 16 31 32 36 and 37 lies close to a School and the speed limit is therefore se
10. he state Result Close State Save the result container Result Save Result Container and close the result container Result Close Result Container Save the network File Save Page 7 12 Public transport There are some default vehicle types available in TEDI e g bus Open the dialog box Vehicle Types PT PT Vehicle Types and then open the dialog box Vehicle Types Library Mark the desired vehicle type in this case bus and click on To Model The vehicle type should now appear in the dialog box Vehicle Types PT Close both dialog boxes sl Make each bus stop approximately 15 meters change size by clicking and dragging on black boxes at the edges Double click on the bus stop to edit Name and Type It is possible to model 3 different types of bus stops Start to code the bus stops using the tool e Normal the bus stops on the street e Bus Bay the bus stops in a little extra lane so that vehicle can pass e Bus terminal the bus turns off to a bus terminal The bus stops should be placed according to the table below B Bus Bay and N Normal Section 2 3 6 7 9 10 13 14 15 16 19 20 21 22 36 37_ Tye N ININ IN B B B BIN IN IN IN IN IN NIN Compare to the picture in appendix 2 Create a bus line by using the tool and then click at any place on the drawing area Double click on the icon that appears and do the following in the dialog box that ap
11. ify the green times according to the table below You can review your signal settings by pressing the Show button Signal group 1 Safety time Signal group 2 Safety time Save Control Save Control and close Control Close Control the traffic control Save the network File Save Page 11 12 Additional task Traffic actuated signal 0 Start by positioning detectors according to appendix 4 by clicking on E and then at the position and the link where the detector should be located The detectors can be moved along the section at which it is placed It is also possible to change the size by dragging with the mouse in the ends of the detector Double click on every detector and check the Count and Presence boxes Name each detector according to the numbering in appendix 4 Open up the created traffic control Control Open Control and save it with another name e g traffic actuated Control Save Control Open up the dialog box Control Plan Control Junctions Change the control Type to Actuated instead of Fixed Mark the first phase under Phases uncheck the Interphase box Set the Min time to 4 seconds and the Max time to the old duration time Go to the Detector tab Click on the detectors that should be connected to the present phase 1 e 41 42 121 122 in phase 1 Set the Extension time to 2 9 seconds for the detectors 42 122 102 and 142 Note Do not forget to press ENTER between the inputs Go to the Actuated t
12. nals Continue with the OD matrix network but save the network with different name File Save Remove all regulations stop or yield in intersection 2 but add yield on all left turnings Open up the intersection and choose None in the Warning drop down list Then choose the Signal groups tab Click on New and choose desired turnings under Unassigned Turnings click on Add The intersection should be controlled by a 2 mixed phase configuration see pictures below Specify the signal groups as Signal group 1 turnings from north south section 4 12 i Signal group 2 turnings from west and east section 10 and 14 A When all turnings are assigned to a signal group the list Unassigned Turnings should be empty Now it is time to specify the green times This is in TEDI done in a traffic control Create a new traffic control Control New Control and save it with a suitable name Control Save Control as Open the dialog box Control Junctions Choose junction 2 in the box at the top and then change the control Type to Fixed The phases are defined by pressing New Check the check box Interphase and specify the green time in the box Duration Choose the signal groups that should be included in the phase in the Signal groups box The safety time is modeled by adding an empty phase i e red for all approaches In GETRAM is all phases assumed to have equal amber times set the amber time to 3 seconds Spec
13. og box Vehicle Types Model and close the result container Result Close Result Container DO NOT CLOSE the dialog box Vehicle Types Library e Create a new OD matrix O D Matrix New O D Matrix and save it O D Matrix Save O D Matrix as e Open up Vehicle Types Model O D Matrix Vehicle Types e Mark the vehicle type Car in Vehicle Types Library and click on To Model Check that the vehicle type Car appears in Vehicle Types Model and then close the two dialog boxes Page 9 12 The OD flows are specified in O D Matrix Statements Click on Ser and set the time period to 07 00 09 00 Divide the time period into two periods of one hour each Write 60 minutes in Set Interval Length of and click on Set The OD flows can either be specified in the dialog box or imported read from a text file There is a OD matrix file at s TN K TNKO082 Lab 1 that you can use Choose Car Vehicle and import the matrix by clicking on Import and choose the file OD matrix txt The OD matrix is also available in appendix 1 The second interval in the OD matrix 15 empty This interval is used to clear all vehicles from the network the vehicles that travel into the network in the previous interval but was not able to exit the network within that period Close the dialog box Save the OD matrix O D Matrix Save O D Matrix and close O D Matrix Close O D Matrix Save the network File Save Page 10 12 Task 3 Traffic sig
14. pear e Name the line e g line 1 in Name under the Basics tab Mark then how the bus line goes through the network by clicking on the sections in that order that the bus will pass The bus will only stop at a bus stop if Assign Stop is chosen mark the section in the table and click on Assign Stop e Go to the Time Tables tab and click on New and name the time table e g Line 1 Click on New at Schedules Slices Specify in the edit box down at the left at what time that the first bus will come Specify departure frequency average and standard deviation under Frequency of Departure e g 10 minutes in average between arrivals and a standard deviation of I minute Choose desired vehicle type Veh Type Specify the Stop Time at the different bus stops in the down right corner Specify average and standard deviation The following bus lines runs through the network Bus stops section numbers Dept frequency 4 13 Bo oo B 14 5 8 2 East_ 7 2 21 27 33 34 35 36 16 19 7 2 21 36 16 19 0 2 West 20 15 37 38 39 40 28 22 3 6 20 15 37 22 3 6 10 B ao E _ _ _ Assume that there are no deviations in departure frequencies Choose suitable values on stop and deviation times for each bus stop and bus line All created bus lines have to be specified in a bus plan PT PT Plans Choose New and name the plan Mark the bus lines and their time tables and click on Add Save the net
15. t to 30 km h For all other sections is the speed limit 50 km h It is also possible to make lane changing restrictions in TEDI this is done under the Lanes tab This is done by marking the lane that should be restricted in Solid Lines The Restriction can be set to the whole section or only a part of it There are no lane restrictions in this network but knowledge about how to model them can be useful in the simulation project lane restrictions are at least m Sweden common for the last meters before an intersection Intersections Please remember to number your intersections in the same way as in this instruction However as for the sections it is possible to change ID number after the creation of an intersection Intersections are created using se The possible turnings are specified under the Basics tab by clicking New and then high lighting the lane or lanes where the turning starts and then high lighting the section where the turning ends see the illustration below To mark several lanes use the SHIFT button Click new again to add a new turning Some turnings have yield or stop regulation this is modeled by choosing Stop or Yield in the Warning drop down list The possible turnings and regulations are specified in the table on the next side Junction 1 Basics Signal groups 5 4 3 3 Id 1 Name 11 Yellow box bo SUS a ae cee n Ta R id Delete Turning Max speed 39 16 Km h
16. work File Save Page 8 12 Task 2 OD matrix Start with saving the network with a different name File Save as An OD matrix describes how many vehicles that want to travel from different origins to different destinations Origins and destinations are in TEDI named centriods Centroids Create the different centroids using the tool Check that their numbering corresponds to the one used in this document You can edit the centroids by double clicking on them Click on New From and then mark the section that runs from the network to the centroid Do the same for the section that runs to the network from the centroid by clicking New To and then on the section see example below la F Name Automatic PF Consider Percentages Connections From section 6 100 00 22 00 To Section 1 100 00 5 00 7 0 New From New To Delete 7 OK Cancel OD matrix The OD matrix varies between different vehicle types but since this network only includes cars we only have to create one OD matrix However we have to specify the vehicle type car again but in order to avoid putting in all numbers again follow the following procedure e Open up Vehicle Types Model Result Open Result Contaioner Result Vehicle Types e Open up the vehicle types library Edit Vehicle Types Library e Mark the vehicle type Car Vehicle Types Model that you created earlier and click on 7o Lib e Close the dial
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