The TRANSIMS Model: Combining Travel Demand and Microsimulation Operating Paradigms

1. The TRANSIMS Model: Combining Travel Demand and Microsimulation Operating Paradigms Presented to2012 ITE District 6 Annual Meeting by John Kerenyi, P.E., Senior Engineer, City of Moreno Valley June 26, 2012

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

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

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)

5. SCAG Region • 40 million daily base-year trips • 50 million daily trips in 2035

6. Microsimulated Subarea • 1 million daily base-year trips • 2 million daily trips in 2035 • Microsimulating the MPO’s Model means: • Consistency • Defensibility • Added detail, e.g. • Intersection control delay • Time-of-day data

7. Set Up Run Router BPR Formula Driven Convert Network Convert Trip Tables Load Network Shuffle Plans Seek System-Optimal Solution Establish Intersection Controls Microsimulator Delay Driven Run Microsimulator Test Router-Derived Plans Stabilize Microsimulation Seek User-Optimal Solution Typical Simulation Flowchart One CPU Four Hours 48 CPUs Five Days 8 CPUs One Day 24 CPUs One Week

8. TAZ’s vs. Activity Locations

9. Commercial/Residential Traffic

10. Box Springs/Freeway Interaction

11. Freeway/Surface Street Diversion

12. Eucalyptus TOD Traffic Prediction

13. Time Of Day Flows—Example TRANSIMS Ground Count

14. Heacock Street Extension

15. ADT Comparison Red: Base network Blue: Alternative network

16. ADT Comparison Red: Base network Blue: Alternative network

17. Heacock Street Users (AM) Red: Base network Blue: Alternative network

18. Heacock Street Users (PM) Red: Base network Blue: Alternative network

19. Perris Blvd Users (AM) Red: Base network Blue: Alternative network

20. Perris Blvd Users (PM) Red: Base network Blue: Alternative network

21. Shifted to Perris (PM) Red: Base network Blue: Alternative network

22. 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 visithttp://code.google.com/p/transims/

23. New TRANSIMS GUI

24. New TRANSIMS Visualizer

25. Potential Applications ofSCAG/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

26. 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

27. Questions?

28. Perris Blvd Speed Differentials (AM)

29. Perris Blvd Speed Differentials (PM)

30. SCAG Region

31. Histograms

32. PM Impacted Intersections

33. Top 10 AM Link Delay Changes

34. Top 10 PM Link Delay Changes

35. Truck Volume Differential (Daily)

36. Truck Volume Differential (Night)

37. Selected Freeway Operations Results

38. Selected Freeway Operations Results