Effectiveness of wearing a bicycle helmet
for impacts against the front of a vehicle
and the road surface. - PubMed - NCBI
as of Mon May 06 2019 22:00:45 GMT-0400 (Eastern Daylight Time)
Traffic Inj Prev. 2018;19(7):773-777. doi:
10.1080/15389588.2018.1498089. Epub 2018 Oct 23.
Effectiveness of wearing a bicycle helmet for impacts against the
front of a vehicle and the road surface.
Matsui Y 1, Oikawa S 2, Hosokawa N 1.
1 Automotive Research Department , National Traffic Safety and
Environment Laboratory , Chofu , Tokyo , Japan.
b Department of Mechanical Engineering , Tokyo College, National
Institute of Technology , Hachioji-shi , Tokyo , Japan.
To assess the effect of wearing a bicycle helmet using an adult
headform in terms of the head injury criterion (HIC) when the frontal
and lateral parts of the helmet impact a vehicle body and also when
the frontal part of the helmet impacts the road surface.
The adult headform was made to impact the hood, windscreen, roof
top, and roof side rail of a vehicle body at an impact velocity of 35
km/h, which is a common head-to-vehicle impact velocity in real-world
cyclist-vehicle collisions, in which the vehicle impacts the cyclist
at 40 km/h.
For the road surface impact experiments, we set a drop height of 1.5 m
(impact velocity of 20 km/h).
Helmet usage helped to reduce the HIC when the frontal and lateral
parts of the helmet impacted vehicle parts other than the hood.
The HIC reduction for the frontal impact was greater than that for
the lateral impact.
Moreover, the higher the stiffness index of the vehicle structure,
the greater was the HIC reduction.
However, helmet usage was ineffective for reducing skull fracture
risk (HIC 2558) when the lateral part of the helmet impacted stiffer
parts of the vehicle, such as the roof side rail close to the
Helmet usage helped to reduce the HIC by 91% when the frontal part
of the helmet impacted the road surface.
Wearing a helmet reduces skull fracture risk when the frontal and
lateral parts of the helmet impact vehicle parts (excluding the hood)
at 35 km/h and the road surface at 20 km/h.
However, when the lateral part of the helmet impacts the B-pillar,
the helmet cannot effectively reduce the skull fracture risk at these
Cyclist; head injury; headform; helmet; road surface impact
experiment; vehicle impact experiment
This not-for-profit reproduction is for the purposes of private study, research, criticism,
review, education, parody or satire as permitted under provisions of Copyright Act
C-42(fair dealing) in Canada, and under Title 17 USC Section 107 of US Copyright
Opinions expressed are personal unless specifically attributed to an organisation
Every time I see an adult on a bicycle, I no longer despair for the future of the human race
- H.G. Wells
MD5 Fingerprint 27:B8:BA:91:70:E5:44:20:8F:29:EE:46:1E:52:F6:81
Est-ce c'est necessaire d'imprimer ce courriel? / Do you really need to print this email?