analysis of fatal crashes involving chennai city's mtc buses

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  1. 1. Analysis of fatal crashes involving Chennai citysAnalysis of fatal crashes involving Chennai citys Metropolitan Transport Corporation (MTC) busesMetropolitan Transport Corporation (MTC) buses Jeya Padmanaban*, Ravishankar Rajaraman**, Swastik Narayan**, Bharat Ramesh**Jeya Padmanaban*, Ravishankar Rajaraman**, Swastik Narayan**, Bharat Ramesh** JP Research India Private LimitedJP Research India Private Limited
  2. 2. JP Research India Pvt Ltd OverviewOverview IntroductionIntroduction MTC busses in Chennai cityMTC busses in Chennai city The issueThe issue Data Collection MethodologyData Collection Methodology Detailed Accident Reports (DAR)Detailed Accident Reports (DAR) Creation of Analytical DatabaseCreation of Analytical Database ResultsResults ConclusionsConclusions
  3. 3. JP Research India Pvt Ltd Chennai City and MTC busesChennai City and MTC buses Chennai CityChennai City spans for over 180 sq.kmspans for over 180 sq.km population density of 24,683 persons perpopulation density of 24,683 persons per sq.km.sq.km. Metropolitan Transport CorporationMetropolitan Transport Corporation Government run bus organizationGovernment run bus organization MTC has a fleet of 3267 buses (2009)MTC has a fleet of 3267 buses (2009) MTC buses carry 5.5 million passengersMTC buses carry 5.5 million passengers every day.every day. Ordinary Semi-Low Floor (SLF) Volvo AC
  4. 4. JP Research India Pvt Ltd The IssueThe Issue Year Number of buses Number of bus crashes Crashes Crashes per bus Fatal Crashes per 1000 busesFatal Injury No injury 2006 2773 2837 129 982 1726 1.02 46.52 2007 2934 3857 142 1213 2502 1.31 48.39 2008 3300 4542 145 1419 2978 1.38 43.93 2009 3267 4284 138 1489 2657 1.31 42.24 Over 40 fatal crashes per 1000 buses per year Over 1 crash per bus per year Lack of in-depth scientific analysis
  5. 5. JP Research India Pvt Ltd Data Collection MethodologyData Collection Methodology Detailed Accident Report (DAR)Detailed Accident Report (DAR) 2-page handwritten report in local language (Tamil)2-page handwritten report in local language (Tamil) Records created and maintained by Accident Branch of MTCRecords created and maintained by Accident Branch of MTC Objective is to fix responsibility for the accidentObjective is to fix responsibility for the accident Researchers used these reports as the base for analysisResearchers used these reports as the base for analysis
  6. 6. JP Research India Pvt Ltd Data Collection MethodologyData Collection Methodology Acquisition of Detailed Accident Reports (DARs)Acquisition of Detailed Accident Reports (DARs) Using Right To Information (RTI)Using Right To Information (RTI) 283 fatal crash reports obtained283 fatal crash reports obtained (2008 - 145; 2009 - 138)(2008 - 145; 2009 - 138) Creation of Analytical DatabaseCreation of Analytical Database Translation of documents to EnglishTranslation of documents to English Extracted information and coded variablesExtracted information and coded variables Personal or proprietary information not includedPersonal or proprietary information not included
  7. 7. JP Research India Pvt Ltd Distribution of Fatal CrashesDistribution of Fatal Crashes by Road User Type Involvedby Road User Type Involved M2Ws, pedestrians and footboard passengers constitute 89% of fatal MTC bus crashes.
  8. 8. JP Research India Pvt Ltd Victim Profile M2W RidersVictim Profile M2W Riders 92% of the fatal M2W riders and footboard passengers were92% of the fatal M2W riders and footboard passengers were malesmales 50% of male M2W fatal riders are ages 20-2950% of male M2W fatal riders are ages 20-29 Helmet usage among the M2W riders are very lowHelmet usage among the M2W riders are very low
  9. 9. JP Research India Pvt Ltd Victim Profile Pedestrians andVictim Profile Pedestrians and Footboard PassengersFootboard Passengers Pedestrian fatalities about 82% were malePedestrian fatalities about 82% were male 85% of male pedestrian fatalities are ages 30 or older85% of male pedestrian fatalities are ages 30 or older 38% of footboard passengers are less than 19 years old38% of footboard passengers are less than 19 years old indicating that fatalities involved school/college studentsindicating that fatalities involved school/college students
  10. 10. JP Research India Pvt Ltd Crash Interaction TypesCrash Interaction Types 11stst Event: Fall DownEvent: Fall Down M2W, Pedestrian or FootboardM2W, Pedestrian or Footboard Passenger falls downPassenger falls down 22ndnd Event: Run OverEvent: Run Over M2W rider, Pedestrian orM2W rider, Pedestrian or Footboard Passenger subsequentlyFootboard Passenger subsequently gets run over by tiresgets run over by tires
  11. 11. JP Research India Pvt Ltd Crash Interaction Types - Place ofCrash Interaction Types - Place of DeathDeath 78% of Run Overs result in fatalities even before victim reaches the hospital
  12. 12. JP Research India Pvt Ltd Run Over by Tire PositionRun Over by Tire Position Rear tires involved in 82% ofRear tires involved in 82% of run oversrun overs
  13. 13. JP Research India Pvt Ltd Run Over by Tire PositionRun Over by Tire Position Run overs involving all footboard passengers 88% of M2W riders were due to rear tires
  14. 14. JP Research India Pvt Ltd Head injury involved - Fall DownHead injury involved - Fall Down onlyonly Helmet use for M2Ws can significantly reduce injury severity
  15. 15. JP Research India Pvt Ltd Pre-Crash Conditions Pre-Crash Conditions M2W Crash ConfigurationsM2W Crash Configurations Sideswipe most predominant crash configuration
  16. 16. JP Research India Pvt Ltd Pre-Crash Conditions Pre-Crash Conditions M2W Crash ConfigurationM2W Crash Configuration Sideswipe collisions resulted in 80% of M2W run overs Crash configuration for 5% of fall downs could not be determined
  17. 17. JP Research India Pvt Ltd Pre-Crash Conditions Pre-Crash Conditions PedestriansPedestrians 64% impacts involved pedestrian crossing the road 82% pedestrians hit by front of the bus
  18. 18. JP Research India Pvt Ltd Pre-Crash Conditions Pre-Crash Conditions Footboard PassengersFootboard Passengers 59% - Passenger Boarding/alighting a bus59% - Passenger Boarding/alighting a bus 31% - Foot board travellers in a moving bus31% - Foot board travellers in a moving bus 94% - Run over of foot board passengers from front door94% - Run over of foot board passengers from front door Importance of doors?Importance of doors? Buses with doors show very low occurrence of foot board passengerBuses with doors show very low occurrence of foot board passenger crashescrashes
  19. 19. JP Research India Pvt Ltd Infrastructure ProblemsInfrastructure Problems Crashes on divided roadsCrashes on divided roads 63% of M2W sideswipe crashes63% of M2W sideswipe crashes 67% of crossing pedestrian impacts67% of crossing pedestrian impacts 30% of pedestrian crashes30% of pedestrian crashes occurred at or near a bus stopoccurred at or near a bus stop
  20. 20. JP Research India Pvt Ltd ConclusionsConclusions Data does exist but needs to be scientifically analyzedData does exist but needs to be scientifically analyzed On-scene crash investigations and in-depth data collection canOn-scene crash investigations and in-depth data collection can act as a good feedback loopact as a good feedback loop
  21. 21. JP Research India Pvt Ltd New buses in 2010New buses in 2010 Sideswipe with M2W Run over prevented due to low ground clearance of bus THANK YOU reachus@jpresearchindia.com

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