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Arterial Traffic Models

Arterial Traffic Models. Ken Courage TTE 6815. Models vs TMSPs. Model: An abstract representation of a real world object or phenomenon A Traffic Model Software Product (TMSP) employs one or more models (usually many models) to produce useful information

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Arterial Traffic Models

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  1. Arterial Traffic Models Ken Courage TTE 6815

  2. Models vs TMSPs • Model: An abstract representation of a real world object or phenomenon • A Traffic Model Software Product (TMSP) employs one or more models (usually many models) to produce useful information • TMSPs are often called models (incorrectly)

  3. Models vs TMSPs Models and TMSPs both have the same flow chart representation Rules of Operation Inputs Outputs

  4. Software Products to be Discussed • TRANSYT-7F • PASSER II • CORSIM (NETSIM)

  5. TRANSYT-7F Link-node based, Mezoscopic (Flow rates) Time-scan, 60 steps per cycle Queue accumulation by input/output Platoon propagation by exponential smoothing Optimization (DI or Pros) by “hill climbing” Software Products to be Discussed

  6. Flow Rate 1 Step in Cycle 60 T7F Flow Profiles (Link-specific)

  7. Platoon Propagation Downstream Node Arrival Departure Upstream Node T7F Link Operations

  8. Departures Arrivals Flow Profile Interpretation 4000+ : : SSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS 3000+ SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSSS 2000+ SSSSSSOOOSSS : SSSSSOOOOOSS : SSSSOOOOOOOS : SSOOOOOOOOOOO : SOOOOOOOOOOOOOI : OOOOOOOOOOOOOOIII 1000+ OOOOOOOOOOOOOOIIII : IOOOOOOOOOOOOOOIIIIII : IIOOOOOOOOOOOOOOIIIIIIIIII : IIOOOOOOOOOOOOOOIIIIIIIIIIIIIIII IIIIII :I IIIOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIIIIIIIOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII ************* **************************** 123456789012345678901234567890123456789012345678901234567890

  9. Departure of previous red arrivals (S) Arrival on green before the queue has cleared (O under S) Arrival on green after the queue has cleared (O not under S) Arrival on red (I) Flow Profile Interpretation 4000+ : : SSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS 3000+ SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSS : SSSSSSSSSSSS 2000+ SSSSSSOOOSSS : SSSSSOOOOOSS : SSSSOOOOOOOS : SSOOOOOOOOOOO : SOOOOOOOOOOOOOI : OOOOOOOOOOOOOOIII 1000+ OOOOOOOOOOOOOOIIII : IOOOOOOOOOOOOOOIIIIII : IIOOOOOOOOOOOOOOIIIIIIIIII : IIOOOOOOOOOOOOOOIIIIIIIIIIIIIIII IIIIII :I IIIOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIIIIIIIOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII ************* **************************** 123456789012345678901234567890123456789012345678901234567890

  10. External link (nearly saturated) : SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSS 3000+ SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS 2000+ SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS :IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII 1000+IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIIIIIOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

  11. External link (undersaturated) : SSSSSSSSS : SSSSSSSSS : SSSSSSSSS : SSSSSSSSS 3000+ SSSSSSSSS : SSSSSSSSS : SSSSSSSSS : SSSSSSSSS : SSSSSSSSS : SSSSSSSSS 2000+ SSSSSSSSS : SSSSSSSSSS : SSSSSSSSSS : SSSSSSSSSS : SSSSSSSSSS : SSSSSSSSSSS 1000+ SSSSSSSSSSS :IIIIIIOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIIIIIOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIII

  12. Departure of red arrivals Not stopped Arrived on red Arrived on green but stopped by queue Platoon arrives on green after queue has cleared : SSSSSSSS : SSSSSSSS 3000+ SSSSSSSS OO : SSSSSSSS OOOOO : SSSSSSSS OOOOOOOOOI : SSSSSSSS OOOOOOOOOOII : SSSSSSSS OOOOOOOOOOOIII : SSSSSSSS OOOOOOOOOOOOIIII 2000+ SSSSSSSS OOOOOOOOOOOOIIIII : SSSSSSSS OOOOOOOOOOOOOIIIIII : SSSSSSSS OOOOOOOOOOOOOIIIIIII : SSSSSSSS OOOOOOOOOOOOOOIIIIIIII : SSSSSSSS OOOOOOOOOOOOOOIIIIIIIII : SSSSSSSSS OOOOOOOOOOOOOOOIIIIIIIIII 1000+ SSSSSSSSS OOOOOOOOOOOOOOOIIIIIIIIIII : SSSSSSSSS OOOOOOOOOOOOOOOOIIIIIIIIII :I SSSSSSSSS OOOOOOOOOOOOOOOOOIIIIIIIIIIII II :IIOSSSSSSSS OOOOOOOOOOOOOOOOOIIIIIIIIIIIIIII III :IIOOOSSSSSS OOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIII :IIOOOOOOOOS OOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIII

  13. Arrived on green But stopped by queue Arrived on red Arrived on green after queue was serviced Platoon arrives at beginning of red : SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS 3000+ SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : SSSSSSSSSSSSSSSSSS : II SSSSSSSSSSSSSSSSSS : IIIIII SSSSSSSSSSSSSSSSSSS : IIIIIIIII SSSSSSSSSSSSSSSSSSS 2000+ IIIIIIIIIIII SSSSSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIII SSSSSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIIIIII SSSSSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIIIIIIII SSSSSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIIIIIIIIII SSSSSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIIIIIIIIIIIII SSSSSSSSSSSSSSSSSSS 1000+ IIIIIIIIIIIIIIIIIIIIIIIIIIIIIOSSSSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIIIIIIIIIIIIIIIOOOOSSSSSSSSSSSSSSS : IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIOOOOOOOOSSSOOOOOSSS : IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIOOOOOOOOOOOOOOOOOOO :OOO IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIOOOOOOOOOOOOOOOOOOOOO :OOOOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIOOOOOOOOOOOOOOOOOOOOO ****************************** Queue Departure

  14. TRANSYT–F Optimization Evaluation Procedures Optimization Search

  15. TRANSYT–F Optimization Evaluation Procedures Optimization Search

  16. Disutility Index • Stops • Delay • Fuel Consumption • Operating Cost

  17. PROs Optimization • A progression opportunity (PRO) is the ability to “see ahead” one signal in the time space diagram • The number of PROs is defined at every intersection on each step of the cycle • The PROs index is the accumulated PROs / the number that would be available if all signals were always green

  18. Bandwidth Efficiency (60 sec cycle) 10 sec 10 /60 = 0.167

  19. PROs Example (60 sec cycle) 1 1 1 2 2 3

  20. Maximum PROs = 60 (3+2+1) = 360 # sec with 3 Pros 2 Pros 1 Pro At 1 10 10 5 At 2 20 5 At 3 25 Total 30 60 35 PROS index= (30+60+35)/360 =0.347 BW efficiency = 10/60 = 0.167

  21. F(t) Original flow profile Downstream projection By S seconds F(t + S) F’(t + S) Exponential smoothing F’(t + S) = K*F’(t+S-1) + (1-K)*F(t+S) Smoothing factor, K, depends on speed and link length Platoon Propagation

  22. Platoon Propagation: Stop line : SSSSSSS : SSSSSSS : SSSSSSS : SSSSSSS 3000+ SSSSSSS : SSSSSSS : SSSSSSS : SSSSSSS : SSSSSSS : SSSSSSSS 2000+ SSSSSSSS : SSSSSSSS : SSSSSSSS : SSSSSSSS : SSSSSSSS :IIIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIII 1000+IIIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIII :IIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIII :IIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIII :IIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIII :IIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIII :IIOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIII

  23. Platoon Propagation: 1000 ft 3000+ : O : OO : OOO : OOOO : OOOOO 2250+ OOOOOO : OOOOOOO : OOOOOOOO : OOOOOOOOO : OOOOOOOOOO : OOOOOOOOOOOO 1500+ OOOOOOOOOOOOO : OOOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO 750+ OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :O OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

  24. Platoon Propagation: 2000 ft 3000+ : : : : : 2250+ : OOO : OOOOOO : OOOOOOO : OOOOOOOOOO : OOOOOOOOOOOO 1500+ OOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOO : OOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOO 750+OOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

  25. Platoon Propagation: 3000 ft 2000+ : : O : OOOOOOO : OOOOOOOOO :O OOOOOOOOOOO 1500+OOO OOOOOOOOOOOO :OOOOO OOOOOOOOOOOO :OOOOOOOO OOOOOOOOOOOOO :OOOOOOOOOOOO OOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOO 1000+OOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOO 500+OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

  26. T7F Link Numbers for Node N

  27. TRANSYT Timing Plan ------------------------------------------------ Intersection 1 Pretimed - Splits Optimized ------------------------------------------------ Interval Number : 1 2 3 4 5 6 7 8 9 10 11 12 Intvl Length(sec): 7.0 5.0 4.0 5.0 22.0 5.0 7.0 5.0 2.0 5.0 18.0 5.0 Intvl Length (%): 8 6 4 6 22 6 8 6 2 6 20 6 Pin Settings (%): 100/0 8 14 18 24 46 52 60 66 68 74 94 Phase Start (No.): 1 2 3 4 5 6 Interval Type : V Y V Y V Y V Y V Y V Y Splits (sec): 12 9 27 12 7 23 Splits (%): 14 10 28 14 8 26 Links Moving : 110 110 111 102 110 109 106 105 105 104 103 101 108 106 -106 104 -102 112 110 107 103 -108 -104 Offset = 0.0 sec 0 %.

  28. Software Products to be Discussed • TRANSYT-7F • PASSER II • CORSIM (NETSIM)

  29. Software Products to be Discussed • PASSER II • Bandwidth optimization • Phasing optimization • Speed Search (+/- 2 mph)

  30. PASSER II Movement Numbers

  31. PASSER Timing Plan *** INT. 1 .0 SEC OFFSET ART ST PHASE SEQ IS LT 5 LEADS (2+5) West .0 % OFFSET CROSS ST PHASE SEQ IS DUAL LEFTS (3+7) ARTERIAL STREET CROSS STREET CONCURRENT PHASES 2+5 2+6 1+6 TOTAL 3+7 3+8 4+8 TOTAL PHASE TIME (SECS) 22.0 17.0 12.0 51.0 12.0 3.0 24.0 39.0

  32. Software Products to be Discussed • TRANSYT-7F • PASSER II • CORSIM (NETSIM)

  33. Software Products to be Discussed • CORSIM (NETSIM) • Microscopic simulation • 1 second time scan • Pretimed control • Explicit actuated control emulation • Hardware in the loop feature • Platoon dispersion by speed differential

  34. CORSIM Node Numbers (AAP)

  35. TRANSYT CORSIM PASSER II Platoon Propagation Comparison Upstream Downstream

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