1. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Pseudo Dynamic Traffic Assignment A Duration Based Static Assignment Process

2. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida ARC Regional Travel Demand Model 24-Hour Volumes 24-Hour Volumes Static Assignment Process Static Assignment Process 13 County Region 13 County Region SOV, HOV, Trucks and Transit SOV, HOV, Trucks and Transit 24-Hour Volumes 24-Hour Volumes Static Assignment Process Static Assignment Process 13 County Region 13 County Region SOV, HOV, Trucks and Transit SOV, HOV, Trucks and Transit Planning Context: I-285 Strategic Implementation Plan

3. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Microscopic Model VISSIM 24-Hour Volumes 24-Hour Volumes Static Assignment Process Static Assignment Process 13 County Region 13 County Region SOV, HOV, Trucks and Transit SOV, HOV, Trucks and Transit 24-Hour Volumes 24-Hour Volumes Static Assignment Process Static Assignment Process 13 County Region 13 County Region SOV, HOV, Trucks and Transit SOV, HOV, Trucks and Transit 15-Min. Volumes 15-Min. Volumes I-285 Corridor I-285 Corridor Traffic Control Traffic Control ITS Strategies ITS Strategies SOV, HOV and Trucks SOV, HOV and Trucks Dynamic Traffic Assignment Dynamic Traffic Assignment 15-Min. Volumes 15-Min. Volumes I-285 Corridor I-285 Corridor Traffic Control Traffic Control ITS Strategies ITS Strategies SOV, HOV and Trucks SOV, HOV and Trucks Dynamic Traffic Assignment Dynamic Traffic Assignment ARC Regional Travel Demand Model 1. Temporal distribution of traffic 2. Better peak period paths Big Leap from Macro to Micro

4. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Microscopic Model VISSIM 24-Hour Volumes 24-Hour Volumes Static Assignment Process Static Assignment Process 13 County Region 13 County Region SOV, HOV, Trucks and Transit SOV, HOV, Trucks and Transit 24-Hour Volumes 24-Hour Volumes Static Assignment Process Static Assignment Process 13 County Region 13 County Region SOV, HOV, Trucks and Transit SOV, HOV, Trucks and Transit 15-Min. Volumes 15-Min. Volumes I-285 Corridor I-285 Corridor Traffic Control Traffic Control ITS Strategies ITS Strategies SOV, HOV and Trucks SOV, HOV and Trucks Dynamic Traffic Assignment Dynamic Traffic Assignment 15-Min. Volumes 15-Min. Volumes I-285 Corridor I-285 Corridor Traffic Control Traffic Control ITS Strategies ITS Strategies SOV, HOV and Trucks SOV, HOV and Trucks Dynamic Traffic Assignment Dynamic Traffic Assignment 15-Min. Volumes 15-Min. Volumes 13 County Region 13 County Region SOV, HOV and Trucks SOV, HOV and Trucks Static Assignment Process Static Assignment Process 15-Min. Volumes 15-Min. Volumes 13 County Region 13 County Region SOV, HOV and Trucks SOV, HOV and Trucks Static Assignment Process Static Assignment Process ARC Regional Travel Demand Model 1. Temporal distribution of traffic 15-Min. Volumes 15-Min. Volumes 13 County Region 13 County Region Traffic Control Traffic Control ITS Strategies ITS Strategies SOV, HOV and Trucks SOV, HOV and Trucks Dynamic Traffic Assignment Dynamic Traffic Assignment 15-Min. Volumes 15-Min. Volumes 13 County Region 13 County Region Traffic Control Traffic Control ITS Strategies ITS Strategies SOV, HOV and Trucks SOV, HOV and Trucks Dynamic Traffic Assignment Dynamic Traffic Assignment Matrix Variegator 2. Better peak period paths Mesoscopic Model DTA Overall Modeling Process

5. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Planned Mesoscopic Approach VISTA –Northwestern University –Only DTA program reported to be able to handle the problem size at the time –Issues encountered: Data assumptions Data preparation Software bugs Memory intensive Excessive runtimes –“Plan B” required

6. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Plan B – Options Considered Successive Static Assignments –Write custom applications to track long trips Use a different DTA package –Cube Avenue, Dynameq, DynaSMART-P, etc. Discovered an option in Citilabs software already in the assignment pathload function that enables volumes to be saved in travel time segments

7. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Pathload Option Valuename specifies the name of a link value that should be used in restricting the links that should be included in the VOL assignment. The primary use of this keyword is for air quality analysis. An example would be to obtain what portion of the volume on a link is in cold start mode. In that case, VOL[2]=MI.1.TRIPS, TIME=0-7.5 would mean to assign only to the links that are within 7.5 minutes from the origin zone. A single range of numbers is required for this keyword. In the example, if a 3 minute link's A node were 6 minutes from I, only 50% of the trip value would be added to the link volume (7.5 is 50% of the way from 6 minutes to 9 minutes). Normally, the range would be 0-some number, but if the range were say, 7.5-99999, only the hot running portion of the trip would be assigned. pathload path=TIME, vol[1]=mw[1], time=0-15, vol[10]=mw[1], time=15-30, vol[11]=mw[1], time=30-45, vol[12]=mw[1], time=45-60, vol[13]=mw[1], time=60-75, vol[14]=mw[1], time=75-99999

8. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida 0-15 minutes 15-30 minutes Preload assignment 2 30-45 minutes Preload assignment 3 45-60 minutes Preload assignment 4 60-75 minutes Preload assignment 5 75 minute trip Pseudo DTA Overview

9. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Pseudo DTA – Preload Management

10. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Two-Zone Examples 60-mile single-lane corridor 60-mile single-lane corridor Assume capacity of 2000 vph Assume capacity of 2000 vph Assume free-flow speed of 60 mph Assume free-flow speed of 60 mph Link sub-divided into 5-mile segments in order to see the progression of volume during the PDTA process Link sub-divided into 5-mile segments in order to see the progression of volume during the PDTA process 60-mile single-lane corridor 60-mile single-lane corridor Assume capacity of 2000 vph Assume capacity of 2000 vph Assume free-flow speed of 60 mph Assume free-flow speed of 60 mph Link sub-divided into 5-mile segments in order to see the progression of volume during the PDTA process Link sub-divided into 5-mile segments in order to see the progression of volume during the PDTA process 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=0 min 60 miles 5 miles Direction of Travel

11. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Two-Zone Examples Free-Flow Traffic Conditions (1000 vph) 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=0 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=15 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=30 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=45 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=60 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=75 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=90 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=105 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=120 min Direction of Travel

12. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Two-Zone Examples Congested Traffic Conditions (2000 vph) 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=0 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=15 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=30 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=45 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=60 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=75 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=90 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=105 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=120 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=135 min Direction of Travel

13. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Two-Zone Examples Over-Saturated Traffic Conditions (3000 vph) 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=0 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=15 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=30 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=45 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=60 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=75 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=90 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=105 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=120 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=135 min Direction of Travel 60 miles 5 miles 000Total Volume (15-minute) 000Preload Volume (15-minute) Time=150 min Direction of Travel

14. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida I-285 Application

15. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Pseudo DTA - Validation

16. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Potential Applications Refined time-of-day assignments Evacuation Modeling Special Events Arrival & Departure Lane Closures

17. 2007 TRB Transportation Planning Applications Conference – Daytona Beach, Florida Questions / Comments