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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 - PowerPoint PPT Presentation
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Arterial Traffic Models
Ken CourageTTE 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
TMSPs are often called models (incorrectly)
Models vs TMSPs
Models and TMSPs both have the same flow chart representation
Inputs OutputsRules of Operation
Software Products to be Discussed
TRANSYT-7F PASSER II CORSIM (NETSIM)
Software Products to be Discussed
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”
T7F Flow Profiles (Link-specific)
Step in Cycle1 60
Flow Rate
T7F Link Operations
Platoon
Propagation
Arrival Departure
Upstream Node
Downstream Node
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
Arrivals
Departures
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
Arrival on red (I)
Departure of previousred arrivals (S)
Arrival on green afterthe queue has cleared (O not under S)
Arrival on green before the queue has cleared (O under S)
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
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
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
Not stopped
Departure of red arrivals
Arrived on red
Arrived on green but stopped by queue
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 ******************************
Arrived on red
Arrived on green after queue was serviced
Arrived on greenBut stopped by queue
Queue Departure
TRANSYT–F Optimization
EvaluationProcedures
Optimization Search
TRANSYT–F Optimization
EvaluationProcedures
Optimization Search
Disutility Index
Stops Delay Fuel Consumption Operating Cost
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
Bandwidth Efficiency
10 /60 = 0.167
(60 sec cycle)
10 sec
PROs Example
3
21
2
11
(60 sec cycle)
Maximum PROs = 60 (3+2+1) = 360
# sec with 3 Pros 2 Pros 1 ProAt 1 10 10 5At 2 20 5At 3 25Total 30 60 35PROS index= (30+60+35)/360 =0.347BW efficiency = 10/60 = 0.167
Platoon Propagation
Downstream projectionBy S seconds
F(t + S)
Original flow profileF(t)
Exponential smoothing F’(t + S)
F’(t + S) = K*F’(t+S-1) + (1-K)*F(t+S)Smoothing factor, K, depends on speed and link length
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
Platoon Propagation: 1000 ft3000+ : 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
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
Platoon Propagation: 3000 ft2000+ : : 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
T7F Link Numbers for Node N
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 %.
Software Products to be Discussed
TRANSYT-7F PASSER II CORSIM (NETSIM)
Software Products to be Discussed
PASSER II
•Bandwidth optimization•Phasing optimization•Speed Search (+/- 2 mph)
PASSER II Movement Numbers
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
Software Products to be Discussed
TRANSYT-7F PASSER II CORSIM (NETSIM)
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
CORSIM Node Numbers (AAP)
Platoon Propagation Comparison
Upstream
Downstream
TRANSYT
CORSIM
PASSER II
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