UDV conducts study on ADAS benefits from its accident database; AEB cuts rear-end crashes at junctions.

Real World Effects of Advanced Driver Assistance Systems

Earlier retrospective accident studies carried out by UDV already predicted benefits for ADAS like AEB and lane support systems (LSS: lane change assist systems LCA and lane-keeping assist systems LKA).

The mix of systems in the vehicle fleet and the available accident data now make it possible to compare accident patterns for passenger cars with and without AEB, LSS and LCA.

The UDV has used its accident database (UDB) in order to perform a comprehensive analytical accident study on the benefits of these systems. In the process, scenarios were also identified in which the current systems are ineffective or insufficiently effective.

The study identifies relevant accident scenarios and describes shifts in the accident patterns for cars either equipped or not equipped with these systems. Based on a case-by-case analysis, it gives possible explanations for the occurrence of such accidents.

The positive shifts in accident patterns show that AEB systems are effective in the following situations:

typical linear rear-end collisions, and in particular

rear-end collisions with vehicles waiting or braking at junctions as well as collisions with the rearmost vehicle in a traffic jam.

reduction in accident severity due to more frequent and more effective braking compared to cars without AEB.

In the following situations, AEB systems show no effect or an insufficient effect:

high driving speeds and on motorways

detection of and response to hazards in curved roads

collisions with two-wheel motor vehicles, collisions with oncoming traffic and accidents involving vehicles turning into or crossing the carriageway.

The positive shifts in accident patterns show that LCA-systems are effective in the following situations:

in accidents on roads outside of built-up areas

serious and fatal accidents outside of built-up areas.

In the following situations, LCA- systems show no effect or an insufficient effect:

complex accidents with multiple lane change maneuvers.

The positive shifts in accident patterns show that LSS systems are effective in the following situations that were caused by unintentional lane departure:

single vehicle accidents and accidents with oncoming traffic

accidents on roads outside of built-up areas and on motorways

serious and fatal accidents in general.

In the following situations, LSS- systems show no effect or an insufficient effect:

accidents at speeds below 60 kph

accidents with impaired drivers (especially impairment due to sudden sickness).

Compact Accident research Report: Real World Effects of Advanced Driver Assistance Systems

rear-end collisions with vehicles waiting or braking at junctions as well as collisions with

the rearmost vehicle in a traffic jam.

collisions with two-wheel motor vehicles, collisions with oncoming

traffic and accidents involving vehicles turning into or crossing the carriageway.

Real World Effects of Advanced Driver Assistance Systems