Road crashes are usually caused by a combination of factors and thus often have multiple causes [5]. For example, it is known that speeding, drink- and/or drug-driving, driving when fatigued and not wearing a seat belt play a role in the occurrence and/or outcome of (fatal) crashes. Road design, vehicle characteristics and certain circumstances can also contribute to the occurrence of a crash. This picture is confirmed in Dutch in-depth research on fatal crashes (see, for example, [6] and [7]). Crash causes are not (reliably) registered in BRON. Therefore, it cannot be unequivocally determined in how many crashes the various factors played a role.
More information about factors that play a role in (fatal) crashes can be found in various SWOV fact sheets under the Risk theme.
