kolkata city fatal accident study (april 2016 march 2017) research study_kol.pdf · kolkata city...

Saving lives through accident research!

Kolkata City Fatal Accident Study(April 2016 – March 2017)

Submitted to

Deputy Commissioner of Police (Traffic), Kolkata City

18 April, 2017

18 April 2017 Kolkata city fatal accident study 1


Overview

• JPRI Accident Response Process

• Notifications by Traffic Control Room

• Fatal accidents examined by JPRI

• Causal and Contributing Factors

• Factors affecting accidents

• Factors affecting injuries

• Conclusions



JPRI Accident Response Process


Notification Phase

• Traffic Control Room calls and notifies about the fatal accident

Response phase

• JPRI team leaves office for the accident location.

Investigation Phase

• JPRI team arrives at the accident spot and checks for accident details and examines available vehicles and scene to have a complete picture of the accident.

Analysis phase

• All investigated cases (Excluding no information cases) are considered for analysis.


Notifications by traffic control room

• Status as on 31st March 2017:

• Total number of notifications : 246

• Number of cases investigated by JPRI : 148

• Number of cases not investigated by JPRI : 98

• Lack of crash scene evidence : 46

• Hit and run : 36

• Late reported : 12

• Lack of vehicles : 4


Note: The above status is based on accident notifications received between Apr’ 2016 to Mar’ 2017.


Distribution of fatal accidents by time zone


00:00 to 05:5958

23%

06:00 to 11:5964

26%12:00 to 17:59

5121%

18:00 to 23:5973

30%

Fatal accident by time zones are almost evenly distributed.

Number of accidents notified: 246


Percentage distribution of vehicles and pedestrians involved


Pedestrians, M2Ws, buses and trucks constitute 80% of road users involved in fatal accidents.

Number of road users: 462

30

1917

14

8 8

2 2

0

50

Pedestrian M2W Bus Truck Car UnknownVehicle

Autorickshaw

Bicyclist

%

Road User Type


Percentage distribution of vehicle and pedestrian fatalities


50

30

7 4 4 4 10

100

Pedestrian M2W Bus Car Truck Bicyclist M3W

%

Road User Type

Pedestrians, M2Ws, bus occupants and bicyclists constitute 91% of fatal road users types

Number of fatal road users : 258


Fatal accident locations

Fatal accidents plotted: 246



Causal and Contributing Factors

Road traffic accidents andinjuries are primarilyinfluenced by three mainfactors :

• Human

• Vehicle

• Infrastructure

Each of these factors caninfluence an accident orinjury causationindependently…


Human

InfrastructureVehicle


Causal and Contributing Factors

… or as a combination.

For e.g.

Human and Vehicle factors,Human and Infrastructurefactors, Vehicle andInfrastructure factors, or allthree together.

This aims to determine thevarious factors influencingfatal city accidents and thesubsequent injuries.


Human

InfrastructureVehicle

h-v h-i

v-i

h-v-i


Contributing Factors for Accidents

The 148 accidents examinedhave been distributed by theircontributing factor(s) and shownin the figure alongside.

The numbers in the figure arepercentage of the total numberof accidents examined.

Hence, the influence of eachfactor for causation of accidentsis:

Human : 95%

Vehicle : 26%

Infrastructure : 98%


2%

3%0%

0% 69%

2%

24%

Human (95%)

Vehicle (26%) Infrastructure (98%)


Human Factors Influencing Accidents


Number of accidents: 148Other factors consists of all the remaining human factors which have individually influenced the accident by less then 4%.

Conditions No. of Accidents % InfluencedExcessive speeding for conditions(11 Cars, 9 Trucks, 10 M2Ws, 8 Buses)

45 30%

Driver Inattention( 3 M2W, 5 Cars, 8 Buses, 9 Trucks, 7 Unknown vehicles,

1 bicyclist)41 28%

Pedestrian dangerous behavior on roadway (23 Pedestrians)

27 18%

Pedestrian Inattention(10 Pedestrians)

14 9%

Improper lane change/lane usage(6 M2Ws, 1 Bus, 1 M3W)

6 6%

Violation of right of way(3 M2Ws, 2 Cars, 1 M3W, 1 Truck)

7 5%

Overtaking on left side of vehicle(5 M2Ws, 1 Bus, 1 Truck)

7 5%

Turning suddenly or without indication(5 M2Ws, 1M3W)

6 4%

Speeding – speed limit unknown(3 Cars, 2 Buses, 1 M3W)

6 4%

Other factors 41 28%


Vehicle Factors Influencing Accidents


Conditions No. of Accidents % Influenced

Vision obstruction due to vehicle interiors(11 Buses, 9 Trucks, 2 Cars)

22 15%

No operational doors(11 Buses)

11 7%

Overloading – people(5 M2Ws, 2 Bicycles)

7 5%

Number of accidents: 148


Infrastructure Factors Influencing Accidents



Poor road marking/signage (38 Buses, 38 M2Ws, 25 Trucks, 28 Cars, 5 M3Ws, 10 Unknown vehicles, 4

bicyclist)148 100%

Poor pedestrian infrastructure – Crossing (32 Pedestrians)

32 22%

Undivided road(2 M2W, 1 M3W, 2 Car, 3 Truck, 2 Bicyclist) 10 7%

Vision obstruction due to manmade objects(4 Trucks, 2 M2Ws, 1 M3W, 1 Car, 1 Pedestrian)

9 6%

Poor bus stop facilities(7 Buses, 2 Pedestrians)

9 6%

Other factors, each contributing less than 3% 37 25%



Contributing Factors for Injury

The 148 accidents resulting intofatal injuries examined havebeen distributed by theircontributing factor(s) and shownin the figure alongside.

The numbers in the figure arepercentage of the total numberof accidents examined whichresulted into fatal injuries.

Hence, the influence of eachfactor for causation of injury is:

Human : 42%

Vehicle : 95%

Infrastructure : 17%


1%

1%54%

28% 3%

3%

10%

Human (42%)

Vehicle (95%) Infrastructure (17%)


Human Factors Influencing Injury



Helmet not used(42 M2Ws, 5 Bicyclists)

47 32%

Seat belt not used(7 Cars, 4 Trucks)

11 7%

Occupants in cargo area(2 Trucks)

2 1%

Overloading of occupants(2 M2Ws)

2 1%



Vehicle Factors Influencing Injury



Knock-down(28 M2Ws, 39 Pedestrian, 2 Buses, 1

M3W, 1 Car, 1 Truck, 3 bicyclist)75 51%

Run over (23 Pedestrians, 15 M2Ws,

11 Bus occupants, 2 Bicyclist, 2 Trucks)

5336%

Fall down(11 M2Ws, 2 Bus occupant fall)

13 9%

Ejection(1 Car, 2 Truck, 2 M3W)

5 3%

Seatbelt not available(2 Cars, 2 Buses, 1 M3W)

5 3%

Passenger compartment intrusion(3 Cars)

3 2%



Infrastructure Factors Influencing Injury



Object impact - Road side/Manmade structures

(8 Cars, 6 M2Ws, 1 M3W, 2 Buses, 1 Truck, 1 Pedestrian)

19 13%

Object impact - road side -trees/plantation

(4 M2Ws)

4 3%

Object impact - on roadway(1 M2W)

1 1%



Conclusions

• Fatal accident by time zones are almost evenly distributed.

• Pedestrians, M2Ws, buses and trucks constitute 80% of road users involved in

fatal accidents.

• Pedestrians, M2Ws, bus occupants and bicyclists constitute 91% of fatal road

user types.

• Fatal accidents in Kolkata are widely spread.


Note: The above conclusions are based on crashes investigated between Apr’ 2016 to Mar’ 2017.


Conclusions – Top 3 Factors (Accident)


Human (95%)

Driver Inattention(30%)

Excessive speeding for conditions (28%)

Pedestrian dangerous behavior on roadway

(18%)

Vehicle (26%)

Vision obstruction due to vehicle interiors (15%)

No operational doors (7%)

Overloading – people (5%)

Infrastructure (98%)

Poor road marking/signage(100%)

Poor pedestrian infrastructure –Crossing (22%)

Poor bus stop facilities (6%)



Conclusions – Top 3 Factors (Injury)


Human (42%)

Helmet not used (32%)

Seat belt not used (7%)

Occupants in cargo area (1%)

Vehicle (95%)

Knock-down (51%)

Run over (36%)

Fall-down (9%)

Infrastructure (17%)

Object impact - Road side/Manmade structures (13%)

Object impact - road side -trees/plantation (3%)

Object impact - on roadway (1%)



Thank You!


We look forward to your continued support in this joint initiative towards a safer roads in Kolkata city.

kolkata city fatal accident study (april 2016 march 2017) research study_kol.pdf · kolkata city...

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