A new methodology is proposed to identify intersections with high numbers of red light-running vehicles. An overview of the field performance of this methodology, based on high-resolution signal controller data, is presented

Bullock, Darcy M

Lavrenz, Steven

English

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Field Evaluation of Red Light Running Evaluation MethodsSteven Lavrenz, Darcy BullockPurdue University101st Annual Purdue Road SchoolWednesday, March 11th, 2015Existing Red Light Running Research• Countermeasure effectiveness vs. site selection• Bonneson (2003): Video detection & automated camera enforcement to track red light runners• Papaioannou (2007), Sharma et al. (2007), Lavrenz et al. (2014): Factors influencing driver behavior in dilemma zones• Lu et al. (2015): Yellow Light Running Identification with Loop DetectorsFactors Behind Red Light Runners (RLRs)Dilemma ZonesShould-stop ZoneShould-go ZoneTYPE 1 DILEMMA ZONEStop barShould-stop ZoneShould-go ZoneTYPE 2 DILEMMA ZONEStop bar?Distracted DrivingSplit Failures & Other CongestionConceptual OverviewField Evaluation of Red Light Running Evaluation MethodsConcept: How is a Red Light Runner Defined?Yellow Interval (Length Varies)End of Green Interval (10s)Start of Red Interval (10s)Detector OnDetector OffDet OnDet OffDet OnDet OffConceptual Example: US231 & State St.Φ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ8Conceptual Example: US231 & State St.Φ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ8Field mounting of cameras for video recordingUS231 & State St US231 & River RdCamera behind signCamera behind signDetector Zone OccupiedDetector Zone OccupiedUno cupiedStart of YellowWaiting Left Turning CarStart of RedRed Light RunnerEstimating RLR Driver Speed through the Intersection𝑅𝐿𝑅 𝑉𝑒ℎ𝑖𝑐𝑙𝑒 𝑆𝑝𝑒𝑒𝑑=𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒𝐷𝑒𝑡 𝑂𝑛𝑇𝑖𝑚𝑒𝐷𝑒𝑡 𝑂𝑛=20𝑓𝑡 + 36𝑓𝑡 ∗1 𝑚𝑖𝑙𝑒5,280𝑓𝑡0.7𝑠 ∗1 ℎ𝑟3,600𝑠= 𝟓𝟒. 𝟓 𝒎𝒑𝒉Estimating RLR Vehicle Speed through the IntersectionDetector On Time = 0.7sVehicle Length = 20ftDetection Zone = 36ftUS 231 & State St. Patterns & TrendsField Evaluation of Red Light Running Evaluation MethodsNormalized RLR Distribution by Day of WeekΦ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ80.005.0010.0015.0020.0025.0030.0035.0040.00SUN MON TUE WED THU FRI SATRed Light Running Vehicle per 1000 ADTPhase 2 Phase 4 Phase 6 Phase 8RLR Distribution by Hour of DayΦ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ80204060801001201401601800 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Count of Red Light Running VehiclesHour of DayPhase 2 Phase 4 Phase 6 Phase 8Normalized RLR Distribution by Hour of DayΦ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ80.005.0010.0015.0020.0025.0030.0035.0040.0045.000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Red Light Running Vehicle per 1000 ADTHour of DayPhase 2 Phase 4 Phase 6 Phase 8Normalized RLR Distribution by Timing Plan0.005.0010.0015.0020.0025.0030.0035.0040.0045.00AM Peak Midday PM Peak OvernightRed Light Running Vehicle per 1000 ADTPhase 2 Phase 4 Phase 6 Phase 8Φ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ8Benefits & Case Study UsesField Evaluation of Red Light Running Evaluation MethodsStatewide High Resolution Signal Ranking• Approximately 140 signals in Indiana with hi-res data• Opportunities for targeted law enforcement• Safety countermeasure screeningPhase 2/6 Top 20 Intersections0246810121416Red Light Runners, All LanesConceptual RankingLeft Turn Split Extension: US231 & River RdΦ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ834567891011122/14 2/16 2/18 2/20 2/22 2/24 2/26 2/28 3/2 3/4 3/6 3/8 3/10 3/12Red Light RunnersEB Left: 1500-1900 Split IncreaseSplit AdjustmentΦ3        5%Φ3        8%Before AfterMean 4.4 3.2Variance 0.7 0.4Observations 11 9Pooled VarianceHypothesized Diff.Degrees Freedomt StatisticP(T<=t) one-tailt Critical one-tail0.60183.390.0021.73Going from Actuated-Coordinated to Fully Actuated Operation: US231 & River RdΦ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ80246810128/28 8/30 9/1 9/3 9/5 9/7 9/9 9/11 9/13 9/15 9/17 9/19 9/21 9/23Red Light RunnersBefore AfterMean 8.1 7.2Variance 6.7 0.9Observations 11 9Pooled VarianceHypothesized Diff.Degrees Freedomt StatisticP(T<=t) one-tailt Critical one-tail 1.734.10180.950.177EB Left: Coordinated  FreeChange from Coord to FreeΦ1 Φ2 Φ3 Φ4Φ5 Φ6 Φ7 Φ8Conclusions• Intersection safety measures using in-place signal infrastructure• Proper signal database maintenance is crucial• Proper phasing, clearance intervals• Identification of detector channels, lane movements, etc.• Evaluation of Countermeasures• Targeted Law Enforcement Opportunities

Field Evaluation of Red Light Running Evaluation Methods

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1507&amp;context=roadschool

Field Evaluation of Red Light Running Evaluation Methods

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