The aim of the investigation is to clarify the economies
of introducing window-mounted extra brake lights on
passenger cars. The parameters used were price of lights
(one or two), reduction in the number of accidents,
private and socio-economic accident costs, discount rate,
and how the regulation should be implemented, a) all
passenger cars at one time or b) new-registered passanger
We have considered the expected development of the
vehicle stock and rear-end collisions during a 20-year
payback period and the real costs of rear-end collisions.
Extra brake lights are a profitable measure if they
reduce the costs of rear-end collisions by 15, 11, 7 and
13 % in Denmark, Finland, Norway and Sweden respectively.
If we assume an accident cost reduction of 20 % for
rear-end collosions and a discount rate of 6 %, the
investment is repaid in 12, 8, 5 and 10 years
respectively in the countries referred to.
The most economically-sound of the above measures is
alternative b). One light is more economical than two
According to the majority of the roughly 60 Nordic
experts interviewed in the investigation, the
accident-reducing effect of extra brake lights is higher
than that required to make them economically justified.
If we consider the socio-economic estimates, the
profitibality of the measure increases by almost a third.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||74|
|Publication status||Published - 1987|
|MoE publication type||Not Eligible|
|Series||Valtion teknillinen tutkimuskeskus. Tiedotteita|
- brake lights
- benefit cost analysis
- traffic accidents