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Case Study Datasets Network NameNodesLinksZonesTrips Case ,600 TestNet ,410 Alexandria2,5723, ,810 1/21/2011 Chicago RTSTEP TRANSIMS Model 3
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Version 5 Hands-On
January 21, 2011David Roden – AECOM
Chicago RTSTEP TRANSIMS Model2
Topics Three case study datasets Batch and configuration files Network conversion Demand conversion Router Plan processing Microsimulator Feedback Boost threads
1/21/2011
Chicago RTSTEP TRANSIMS Model3
Case Study Datasets
Network Name Nodes Links Zones Trips
Case1 15 13 5 4,600
TestNet 72 73 30 25,410
Alexandria 2,572 3,606 85 378,810
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Chicago RTSTEP TRANSIMS Model4
Batch Files Start with Case1\control directory Open the RunAll.bat with a text editor
Right click Edit Set paths to executable programs and the configuration
file Open the Config.txt file with a text editor to review or edit
the configuration file
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Chicago RTSTEP TRANSIMS Model5
Configuration Files A configuration file can set global control keys
– Set TRANSIMS_CONFIG_FILE=…
Program control keys override configuration keys1/21/2011
PROJECT_DIRECTORY ../DEFAULT_FILE_FORMAT TAB_DELIMITEDTIME_OF_DAY_FORMAT HOUR_CLOCKMODEL_START_TIME 0:00MODEL_END_TIME 27:00UNITS_OF_MEASURE ENGLISHNUMBER_OF_THREADS 4NOTES_AND_NAME_FIELDS TRUE
Chicago RTSTEP TRANSIMS Model6
Network Conversion NetPrep
– Reformat network link and node data
TransimsNet– Apply warrants/rules to synthesize TRANSIMS network details– Pocket lanes, lane connectivity, activity locations, parking lots, access
links, lane use, turn prohibitions, and signal and sign warrants
IntControl– Synthesize traffic controls from signal and sign warrants– Signal timing and phasing plans, detectors and phase offsets
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Chicago RTSTEP TRANSIMS Model7
Conversion Process
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TransimsNet
Synthetic Network
ArcNet
Network Shapefile
Control Warrants
IntControl
Traffic Controls
NetPrepConversion Script
Input_Link Input_Node Input_Zone
Link/Node/Zone
Chicago RTSTEP TRANSIMS Model8
Review Control Files Go to the control folder and open
– NetPrep.ctl– TransimsNet.ctl– IntControl.ctl– ArcNet.ctl
Look for the input/output files and the program parameters
Review the inputs\NetPrep_Script.txt
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Chicago RTSTEP TRANSIMS Model9
Demand Conversion Process distributes aggregate trip table data to
individual travelers at specific locations and trip start times– Zones activity locations within the zone– Daily/time period second of the day
Trip purpose and orientation used to allocate trips to activity locations and set travel schedules– Activity location distribution weights by trip type– Diurnal distribution curves by trip type
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Chicago RTSTEP TRANSIMS Model10
Demand Conversion Process
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Location data
Zone Data
Location File
Conversion Script
Convert Trips
Trip Tables
Diurnal Distributions
Activity Location
Trip File HouseholdFile Vehicle File
Chicago RTSTEP TRANSIMS Model11
Review Demand Inputs Go to the input folder and open
– Auto_Trips.txt– Transit_Trips.txt– HBW_PA.txt (Diurnal information)– Vehicle_Type.txt– LocationData_Script.txt
Go to the control folder and open– LocationData.ctl– ConverTrips.ctl
Look for the input/output files and the program parameters
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Chicago RTSTEP TRANSIMS Model12
Demand Conversion
0:050:15
0:250:35
0:450:55
1:051:15
1:251:35
1:451:55
0
500
1000
1500
2000
2500
Trip Start Time
Axis Title
Num
ber o
f Trip
s Sta
rted
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Converting the traditional zone based demand database to the activity based demand database
Chicago RTSTEP TRANSIMS Model13
Router Create partitions using “RandomSelect”
– Divides travelers to randomly selected partitions
Build paths for all the trips using “Router”– Paths built with Free Flow Speeds or an input link delay file
Go to the control folder and open– RandomSelect.ctl– Router.ctl
Look for the input/output files and the program parameters
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Chicago RTSTEP TRANSIMS Model14
Router Process
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Router
Link
Node
Connection
New Plans (Travel Paths) New LinkDelay File
Selection File
Random SelectTrip File
Parking
Location
Plans
Link Delay File
Trip File
Vehicle File
Vehicle Type File
New Problem File
Chicago RTSTEP TRANSIMS Model15
Plan Processing Preparing the plans file to be read by Microsimulator
– Plans are sorted based on their starting time
Go to the control folder and open– PlanPrep.ctl
Look for the input/output files and the Plan_Sort_Type key
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PlanPrep
Sorted Plans
New Plans
Chicago RTSTEP TRANSIMS Model16
Microsimulator A cell-based simulator that moves vehicles between
link-lane-cells on a second-by-second basis– Cell length are equal to the length of the smallest vehicle
in the Vehicle_Type file• Trucks occupy multiple cells
– Includes traffic signals and stop signs, reaction time, required and discretionary lane changing, random slow downs, permissive merge probabilities, vehicle loading and parking, plan following, bus stop interactions, etc.
– Actual travel time of each trip is calculated
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Chicago RTSTEP TRANSIMS Model17
Microsimulator Process
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Microsimulator
New Performance File (s)
New LinkDelay File (s)
Sorted PlansVehicle File
New Problem File
Network
New Sanpshot File (s)
New Occupancy File (s)
New Turn Volume File (s)
Vehicle Type File
Chicago RTSTEP TRANSIMS Model18
Microsimulator Output
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Auto Truck
Chicago RTSTEP TRANSIMS Model19
Feedback – Router Stabilization
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PlanPrep
Microsimulator
Router
New Link Delay
LinkDelay
PlanSelect
Selected Plans
Travel Plans
Sorted Plans
Travel Times
Change ?StopNo
Yes
