Overview of Truck Accidents in Japan

Informal Meeting of Cab Strength

2007.4.10

(Current materials concerning truck accidents)

GRSP-INF-CS/5

Accident type of truck driver

＜ National traffic accident data in 1995＞

Rear-end35%

Intersection10%

Intersection10%

Intersection8%

Other18%

Head-on21%

Head-on18%

Head-on18%

Head-on21%

Rear-end45%

Rear-end44%

Rear-end37%

Intersection5% Other

9%

Other14%

Other17%

Alone9%

Alone20%

Alone29%

Alone11%

0% 20% 40% 60% 80% 100%

Total

Minor

Serious

Fatal

Severity of injuries on truck drivers classified by the accident

N=130

N=345

N=2945

N=2270

Injury

Injury

Injury

*Object truck model : 12ton < GVW* Except 3rd concerned truck in pile up accidents.

Collision part of truck

＜ National traffic accident data in 1995＞

*Vehicle to vehicle collision except 3rd concerned truck in pile up accidents.*Object truck model : 12ton < GVW

Front61%

Front55%

Front82%

Front96%

36%

39%

12%

0% 20% 40% 60% 80% 100%

Total

Minor

Serious

Fatal

Front

Right side

Left side

Rear

Injury

Injury

Injury

N=92

N=276

N=2243

Severity of injuries on truck drivers classified by damaged areas

Injury region and contact point

Fatal Injur N=174

Serious Injury N=620

With seat-beltWithout seat-belt

＜ National traffic accident data in 1992-96＞*Hear-on and Rear-end collision accidents

Effect of wearing seatbelt

60 40 20 0Probability (%)

0 10 20 30Probability (%)

without seat-belt with seat-belt

Thorax-Steering

Abdomen-Steering

Leg & Arm-Instrumental panel

(Fatal+Serious)/(Fatal+Serious+Minor) Fatal/(Fatal+Serious+Minor)Fatal-serious injury rate Fatal injury rate

＜ National traffic accident data in 1992-96＞*Hear-on and Rear-end collision accidents

In-depth data

JAMA investigated HGV rollover accidents by using the in-depth data of Japan highway Safety Center (JHS).

JHS collects a HGV accidents around the Toumei-highway.

Rollover data: 55 vehicles(1997-2005)

Nagoya

Tokyo

Toumei-highway

Data collectimg aria

Truck rollover accidents The rollover accident occurs also in Japan. No injury:47% Injury (almost slight injury):31% Therefore, serious rollover accident is few in Japan. 90-rollover is 87% of all rollover accident. 180-rollover

is only 4%.

90- rollover87%

Other9%

180- rollover4%

HGV: 55

Unknown22%

Injury31%

No injury47%HGV: 55

Deformation mode of 90 rollover

Little deformation : 34% (Front guard frame or van body greatly contributed to the restraint of the cab deformation).

Most many deformation : C-type

(21%), these thinks 90-rollover with subsequent impact.

Little deformation A type B type C type D type

A2%

D6%

B10%

C21%

Difficult todetermine

27%

Littledeformation

34%

HGV: 48

Summary

Most important cases of the truck crew's injury . → Frontal accident 1) Rear-end (front / rear) 2) Head-on (front / front)

Rollover accidents are few in serious injuries of trck drivers.

Thank you !