Apply DynusT Model for Incident Management along Loop 101 Corridor Lili(Leo) Luo, P.E. ITS/Safety Engineer Sarath Joshua, P.E. ITS/Safety Program Manager
What do Transportation Models do? Help us answer the What if questions. One example: What if we adjust the splits given the existing Turning Movement Volumes? Would that reduce delay? With one catch: The underlying method/algorithm of the model is sound or at least its limitations are well understood.
Example: SYNCHRO One of the most widely used signal timing models Implementation of HCM method and other analytical methods Did not account for intersection spill back or turn bay blockage, etc. Limitations may be addressed through timing fine tuning process --Still considered a very useful tool for signal timing analysis
Role of Models We should not discard all Models because they are not sufficiently realistic Need to recognize that, at best, models are a close representation of reality Models are very useful because they can help answer complex what if questions
What is DTA? A more realistic representation of how each individual decide which path he/she is going to take from origin to destination. An aggregation of this path choice decision from all of the individuals forms the volumes on our street network.
MAG DynusT Model Network 11,200 Sq Miles # of links: 24869 # of nodes: 11550 # of signalized intersections: 2933 # of zones: 2006 10+ Million Trips
MAG DynusT Model Network (cont.) Covers all the major arterials and the entire freeway system within the current planning boundary Simulates traffic across the entire network for 24hr for a typical work day Capable in converting into VISSIM model for more detail hot spot analysis and visualization
Model Calibration--Count AM Simulation Count V. Actual Count PM Simulation Count V. Actual Count
Model Validation Bottleneck AM Dynust Output AM MAG Bottleneck Study PM Dynust Output PM MAG Bottleneck Study
Model Validation Travel Time 7:30AM-8:00AM 35.00 31.25 30.00 25.00 24.95 20.00 18.89 20.74 15.00 13.60 10.98 10.00 8.54 6.28 7.25 5.00 3.64 0.00 US60 to L202 L202 to US60 SH51 to L202 I-10 to SH51 I-17 to I-10 TT Survey Simulation Travel Time Along Loop 101NB by Segments
Application on Loop 101 Verify the pre-designed diversion plan Focus resources on major diversion routes Promote coordination Improve Incident Response, improve safety and reduce congestion
The Original Plan PINNACLE PEAK SECTOR 3 BELL PIMA FWY / LOOP 101 LOCAL INCIDENT DETOUR PLAN GREENWAY THUNDERBIRD CACTUS SHEA SECTOR 2 STRATEGIC SECTOR # DOUBLETREE McCORMICK VIA DE VENTURA INDIAN BEND McDONALD CHAPARRAL INDIAN SCHOOL SECTOR 1 SAMPLE INCIDENT LOCATION POSSIBLE DETOUR ROUTES LOCAL DYNAMIC MESSAGE SIGN THOMAS McDOWELL McKELLIPS Note: Scottsdale does not control any of the freeway interchange signals south of Indian Bend. In order to have better remote control of traffic exiting the freeway during an incident we would need communications to those signals.
2013 Western ITE Conference Freeway Statistics Upstream Flow
2013 Western ITE Conference Freeway Statistics Upstream Travel Time
Freeway Statistics 6 Miles Upstream
Arterial Statistics Suggested Diversion Routes 2013 Western ITE Conference
Arterial Statistics Hayden NB Traffic Flow
Arterial statistics Volume Time Volume Street Hayden Direction NB Location Between Princess Drive and Loop 101 Link# 26525 FromNode 10031 ToNode 11122 3:15 160 3:30 167 3:45 172 4:00 155 4:15 220 4:30 377 4:45 494 5:00 540 5:15 520..
Arterial Statistics Turning Movement Counts Intersection Dir Movement 6:30 6:45 7:00 7:15 7:30 7:45 8:00 8:15 8:30 8:45 9:00 Pima&McDo well SB right 18 22 27 37 54 77 89 124 157 193 237 SB left 37 54 62 79 91 114 133 161 197 244 287 EB left 56 79 87 129 179 241 301 392 500 632 777 EB through 150 220 269 355 462 567 680 834 1014 1180 1328 WB right 42 64 92 111 151 209 255 334 409 491 608 WB through 84 128 168 217 280 364 447 534 647 775 922
Recommendations PINNACLE PEAK SECTOR 3 BELL GREENWAY THUNDERBIRD CACTUS SHEA SECTOR 2 DOUBLETREE McCORMICK VIA DE VENTURA INDIAN BEND McDONALD CHAPARRAL INDIAN SCHOOL THOMAS McDOWELL McKELLIPS SECTOR 1
What else the DTA models can do? Regional or area-wide traffic operations strategies have system wide impacts One-way Couplets V. Two-way Streets Reversible Lanes V. Fixed-use Lanes Traffic Incident Management Strategies Major Construction Traffic Control Emergency Evacuation Integrated Corridor Management