BikeSim User Manual Version 1.0
Contents
1. Cs A a SELT E a i L L 1 1 L gt 1 1 1 1 L i j ji L 1 1 leva Applet Window Tava Applet Window Tava Applet Window ome SNERO or os os oP om ep es aR a lee Hees Ome 17 4 Figure 1 The screenshot of the BikeSim 3 1 The main window The main window visualises the spatial structure of this simulation The activities and interactions of the agents are displayed on the monitor where users can observe the behaviour of agents and emerging phenomena 3 2 Control panels The control panels are set to change the attributes and parameters of BikeSim The adjustment of these panels is detailed in sections 4 2 and 4 3 3 3 Observing windows There are a number of observing windows with the function of collecting the information of the agents and displaying the graphs 1 Speed Density Chart The fundamental diagrams can be obtained from BikeSim To display the speed density relationship of the simulation result press the Control Panels button from the main window In the pop up window Main Controller press the Speed Density Chart button 2 Speed Flow Chart Press the Control Panels button from the main window then press the Speed Flow Chart from the Main Controller 3 Flow Density Chart Press the Control Panels button from the main window then press the Flow Density Chart from the Main Controller 4 Saturation Flow Chart The Saturation Flow Chart desc2. changing the scope of the window This can be done by pressing the Control Panels button from the main window In the pop up window Main Controller press the Road button then change the value of Window scope in the window Road Property Please note that the Reset button in the main window has to be pressed to confirm the change 6 Computational speed BikeSim is able to adjust the computational speed of the program A slower speed enables users to observe the movement of the vehicles whereas a faster one saves the simulating time To change the speed press the Control Panels button from the main window In the pop up window Parameter Controller press the Parameter button then change the value of Time Warp Factor by adjust the slider bar The larger value means the faster executing speed The default value is 30 After the adjustment press Reset button in the main window to confirm the change 4 3 Scenario settings 1 Length of the link To change the length of the link press the Control Panels button from the main window In the pop up window Main Controller press the Road button then change the value of Street Length in the window Road Property After the adjustment press Reset button in the main window to confirm the change 2 Width of the lanes To change the width of the lanes press the Control Panels button from the
3. eee ApH O dete see eed ie 3 2m 290 m 10m Figure 2 The default settings of the simulation environment 8 Vehicle generation The vehicles in each lane are generated by the time headways drawn from a normal distribution normal 2000 200 1 0 57 sec The mean of this normal distribution decreased along with the simulation time t following a rectangular hyperbola curve However when the time headways drawn form this distribution were shorter than safety time headways the vehicles would be generated by safety time headways Thus this vehicle generation mechanism could simulate the traffic which changed gradually from a free flow to a congested flow The flow would achieve the maximum flow rate at the simulation time of around 1 800 sec 9 Other settings The description of the other settings in BikeSim can be found in chapter 7 of 4 2 Simulator control 1 Start Start the simulation according to the current settings The Start button is located at the main window 2 Stop Stop the simulation according to the current settings The Stop button is located at the main window 3 Clear Redraw the images according to the current simulation results The Clear button is located at the main window 4 Reset Reset the parameters of the simulation according to the adjustments of users The Reset button is located at the main window 5 Window scope BikeSim is able to zoom out or zoom in on the traffic by
4. BikeSim User Manual Version 1 0 Tzu Chang Lee John W Polak and Michael GH Bell 1 July 2008 1 Introduction BikeSim is a multi agent system for simulating the movements of motorcycles in mixed traffic This program aims to estimate the flow rate of a section of road under constraints such as lane layout traffic composition traffic signals etc Hence it is a useful tool for analysing the impacts of the presence of motorcycles The features of BikeSim are listed below 1 BikeSim is developed by using Java language users all over the world can use this software for free via the Internet 2 BikeSim simulates the traffic flow focusing on capturing the interactions between motorcycles and other vehicle types so it is able to represent the unique movements of motorcycles and the characteristics of mixed traffic 3 The outcomes of the models are visualises Hence the movements of the vehicles in traffic can be observed 4 The fundamental diagrams of the simulation results are produced in this software 2 Installation and System Requirements In order to perform BikeSim a computer which is connected to the Internet and has been installed a web browser and Java is needed The web browser can be Firefox Windows IE Internet Explorer or other browsers A copy of Firefox can be obtained at www mozilla com the Windows IE can be downloaded at www microsoft com The browser should be set to enable to display Java applets The J
5. ava environment in the computer should be Java J2SE 1 4 or later edition which is available at www java com en download manual jsp To diagnose the configuration of Java in the computer please visit www realapplets com help_java asp After the above requirements are met the computer can execute BikeSim by linking to www cts cv imperial ac uk StaffPages TzuchangLee Bike htm The program will be run automatically once the webpage is shown Centre for Transport Studies Imperial College London 3 User Interface BikeSim has a graphical user interface which consists of a main window several control panels and observing windows which are described below The screenshot of the user interface is shown in Figure 1 Simulation of Motorcycles Mozilla Firefox File Edit View History Bookmarks Tools Help lt o X o O hp wwwcetscvimperalac uk StafPages TzuchangLee Bike htm WW Wz Wikipedia English L Simulation of Motorcycles il 3 iGoogle Vehicle following model for simulating motorcycles updated 26th Feb 2008 Start Stop Clear Reset Control Panels Aux Main Controller ee m lojxi Parameter Simulation Road Speed Flow Chart Speed Density Chart Flow Density Chart Tava Applet Window Parameter Controller Speed Density Chart I Flow Density Chart MME M a iguration please visit 0 20 40 60 80 100 de upgrade Java Applet Window a
6. d in Chapter 3 of as the simulation process have been detailed in its Chapter 7 References 1 Lee T C An Agent Based Model to Simulate Motorcycle Behaviour in Mixed Traffic Flow PhD dissertation Imperial College London UK Accessed on Ist July 2008 at www cts cv ic ac uk documents theses LeePhD pdf 2007
7. main window In the pop up window Main Controller press the Road button then change the value of Width of Lane x for each lane in the window Road Property After the adjustment press Reset button in the main window to confirm the change 3 Traffic signal To turn on or turn off the traffic signal press the Control Panels button from the main window In the pop up window Main Controller press the Simulation button then select or un select Signal in the window Simulation Controller After the adjustment press Reset button in the main window to confirm the change 4 Advanced stop line BikeSim is able to simulate the advanced stop line which is used to constitute a reservoir area for motorcycles behind the traffic signal The advanced stop line is set to be situated 10 m back from the primary stop line It is synchronised with the traffic signal and forbids passenger cars to run across in the red time To activate the advanced stop line press the Control Panels button from the main window In the pop up window Main Controller press the Simulation button then select Advanced Stop Line in the window Simulation Controller After the adjustment press Reset button in the main window to confirm the change 5 Motorcycle desired speed To change the desired speed of motorcycles press the Control Panels button from the main window In the po
8. p up window Parameter Controller press the Parameter button then change the value of Bike Desired Speed by adjust the slider bar The default value is 48 km hr After the adjustment press Reset button in the main window to confirm the change 6 Passenger car desired speed To change the desired speed of passenger cars press the Control Panels button from the main window In the pop up window Parameter Controller press the Parameter button then change the value of Car Desired Speed by adjust the slider bar The default value is 48 km hr After the adjustment press Reset button in the main window to confirm the change 7 Traffic composition To change the proportion of motorcycles press the Control Panels button from the main window In the pop up window Parameter Controller press the Parameter button then change the value of Proportion of Bike by adjust the slider bar The default value is 25 After the adjustment press Reset button in the main window to confirm the change 5 Mathematical Models and Simulation Process The mathematical models and simulation process of BikeSim are developed focusing on representing the unique movements of motorcycles and the characteristics of mixed traffic The characteristic behaviour patterns of motorcycles to be modelled can be found in Chapter 2 of 7 The mathematical models used in BikeSim have been describe
9. ribes the relationship of the flow rate and time measured at the end of the traffic It is able to illustrate the saturation flow rate of the traffic when the traffic signal has turned on 4 Simulation 4 1 Default settings The program will be executed automatically as the browser links to www cts cv imperial ac uk StaffPages TzuchangLee Bike htm The default settings are described as follows 1 Simulation time 12 000 sec 2 Length of the link 300 m 3 Number of lanes 3 4 Proportion of motorcycles 25 5 Speed limit 48 km hr 6 Width of lanes The widths of these lanes from the fast lane to the slow lane for left hand traffic are 3 2 m 3 2 m and 3 6 m 7 Signal control A traffic signal is scheduled to take effect at the 1 801 sec This traffic signal employed for the purpose of simulating the traffic disturbance downstream is installed near the end of the link It is designed to have three signal phases with a cycle length of 93 sec The length of the amber light is set to be the first 3 sec of the red light In order to simulate the traffic conditions from slightly delay to the traffic gridlock the lengths of the green and red lights varied with the simulation time The length the red light including the amber was O sec initially but would increase by 1 sec for every 200 sec This schedule ensured that this simulation was able to represent all kinds of flow speed density compositions in the traffic 3 2m ee
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