The TRANSIMS Model: Combining Travel Demand and Microsimulation Operating Paradigms Presented to...
If you can't read please download the document
The TRANSIMS Model: Combining Travel Demand and Microsimulation Operating Paradigms Presented to 2012 ITE District 6 Annual Meeting by John Kerenyi, P.E.,
The TRANSIMS Model: Combining Travel Demand and Microsimulation
Operating Paradigms Presented to 2012 ITE District 6 Annual Meeting
by John Kerenyi, P.E., Senior Engineer, City of Moreno Valley June
26, 2012
Slide 2
Summary of Presentation What is TRANSIMS How are travel demand
and microsimulation combined Selected results from Heacock Street
extension study (new street connection) Current status of TRANSIMS
software Prospects for future use of dataset
Slide 3
TRANSIMS Overview Seeks to incorporate additional detail into
the traffic forecasting process Movement of individual vehicles
Intersection controls e.g. traffic signal operation, gap acceptance
at unsignalized locations
Slide 4
Trip Conversion Process TRANSIMS is an activity-based model;
however, development of a robust activity modeler is suspended
pending better data to operate on As a result, the travel
information TRANSIMS currently operates on is typically imported
from a four-step model (in this case, RivTAM, which is based on the
current SCAG model)
Slide 5
SCAG Region 40 million daily base-year trips 50 million daily
trips in 2035
Slide 6
Microsimulated Subarea 1 million daily base-year trips 2
million daily trips in 2035 Microsimulating the MPOs Model means:
Consistency Defensibility Added detail, e.g. Intersection control
delay Time-of-day data
Slide 7
Typical Simulation Flowchart Convert Network Convert Trip
Tables Load Network Run Router Shuffle Plans Seek System-Optimal
Solution Test Router- Derived Plans Run Microsimulator Stabilize
Microsimulation Seek User-Optimal Solution Establish Intersection
Controls BPR Formula Driven Microsimulator Delay Driven Set Up One
CPU Four Hours 48 CPUs Five Days 24 CPUs One Week 8 CPUs One
Day
Slide 8
TAZs vs. Activity Locations
Slide 9
Commercial/Residential Traffic
Slide 10
Box Springs/Freeway Interaction
Slide 11
Freeway/Surface Street Diversion
Slide 12
Eucalyptus TOD Traffic Prediction
Slide 13
Time Of Day FlowsExample TRANSIMSGround Count
Slide 14
Heacock Street Extension
Slide 15
ADT Comparison Red: Base network Blue: Alternative network
Slide 16
ADT Comparison Red: Base network Blue: Alternative network
Slide 17
Heacock Street Users (AM) Red: Base network Blue: Alternative
network
Slide 18
Heacock Street Users (PM) Red: Base network Blue: Alternative
network
Slide 19
Perris Blvd Users (AM) Red: Base network Blue: Alternative
network
Slide 20
Perris Blvd Users (PM) Red: Base network Blue: Alternative
network
Slide 21
Shifted to Perris (AM) Red: Base network Blue: Alternative
network
Slide 22
Shifted to Perris (PM) Red: Base network Blue: Alternative
network
Slide 23
TRANSIMS Program Status Moreno Valley TRANSIMS uses Version 4,
which is stable Version 5 is actively under development; focuses on
better integration between tools TRANSIMS is open-source; FWHA pays
AECOM to write the code, which is freely shared For more
information visit http://code.google.com/p/transims/
Slide 24
New TRANSIMS GUI
Slide 25
New TRANSIMS Visualizer
Slide 26
Potential Applications of SCAG/RIVTAM Dataset Link
addition/deletion/change Major project construction detours
Operational enhancements e.g. intersection controls, lane
augmentation, signal operation improvements Any application
requiring refined time-of-day analysis Rigor of four-step model
with detail of microsim
Slide 27
Acknowledgements Carleton Waters of Urban Crossroads served as
advisor and his staff provided the trip table alternatives by
running TransCAD/RivTAM Mike Ainsworth from SCAG lent input and
support to the FHWA proposal and attended every TRC meeting,
lending further valuable input James Camarillo and Maria Aranguiz
from Caltrans District 8 attended TRC meetings regularly
Slide 28
Questions?
Slide 29
Perris Blvd Speed Differentials (AM)
Slide 30
Perris Blvd Speed Differentials (PM)
Slide 31
SCAG Region
Slide 32
Histograms
Slide 33
PM Impacted Intersections
Slide 34
Top 10 AM Link Delay Changes
Slide 35
Top 10 PM Link Delay Changes
Slide 36
Subregion
Slide 37
Commercial/Residential Traffic
Slide 38
Turning Movement Validation AMPM
Slide 39
Microsimulator Outputs Base Land Use ScenarioAlternate Land Use
Scenario