1. Dynamic Traffic Assignment: Integrating Dynameq into Long Range Planning Studies Model City 2011 – Portland, Oregon Richard Walker - Portland Metro Scott Higgins, Peter Bosa – Portland Metro

2. Introduction Current DTA Applications Immediate project impacts (e.g., lane closures, ramp openings, construction impacts, etc.) Short term horizon DTA as a planning tool Alternative analysis (multiple scenarios, comparative evaluation metrics) Long term horizon

3. Overview 1.Motivation for change 2.Assignment metrics 3.Challenges 4.Status 5.Future plans and applications

4. Motivation for Change Congestion is a given. Assignment tools need to operate within that environment. Decision metrics are changing Queuing and path choice effects Duration of congestion Temporal characteristics matter

5. Assignment Metrics -Static Static assignment – Served us well, but – Shortcomings are becoming problematic

6. Metrics - Static V/C ratios – PM 2 hr. Can exceed 1.0. Represent average conditions

7. Metrics - Static Average speeds – PM 2 hr

8. Metrics - Static PM 2-hr volume flows based upon average speeds for time period

9. Assignment Metrics - DTA Dynameq (DTA) – Addresses many of the shortcomings

10. Metrics - DTA Incremental volumes: 6:30 – 6:35 p.m.

11. Metrics - DTA Incremental volumes: 6:35 to 6:40 p.m.

12. Metrics - DTA Incremental volumes: 6:40 to 6:45 p.m.

13. 13 Metrics – DTA Temporal characteristics Static DTA Detector Vehicles per lane per hour

14. 14 Metrics – DTA Temporal characteristics

15. Metrics - DTA Queuing effects – 6:35 to 6:40 pm

16. 16 Metrics – DTA Time –space diagram

17. 17 Metrics - DTA Travel time trajectories

18. Metrics - DTA Potential for more “realistic” turns at intersections Signal plans Accounts for conflicting moves Visualization/animation Pricing strategies Reliability

19. Challenges Building staff expertise Adding network attributes Validation more work Base vs. future year temporal profile Scenario preparation time Computer run time

20. Status Staff development Read (DTA Primer) Observe other studies Develop expertise with other DTA software. (Note: We have recently added Dynameq capability). Dynameq – tutorial and formal training Network development Geometries Attributes (signal locations, lanes/turn bays, etc.)

21. Status Regional application - DynusT Freeway focus, major highways Consistent with cutline counts o Temporal profile checks Portal data - PSU INRIX o 2035 application

22. Status Corridor application – Dynameq Recent purchase – very early stages Subarea has been created with INRO’s assistance Knowledge building o Add signal plans in the heart of the corridor study area. Simpler intersection treatment outside the focal point. o 2035 application o Alternative analysis

23. Near Term Applications East Metro Connection Plan – Dynameq corridor study – “test” application SW Corridor Study – Transit study – Lane removals

24. Future Plans Elevate DTA to “everyday tool” status Use DTA to provide better input to microsimulation Link to MOVES Investigate transit treatment in DTA Link to tour based model – “DASH” model very temporally based

25. Thank you Questions?