Reducing comparative optimism regarding risk perceptions in traffic accidents has been proven to be
particularly difficult (Delhomme, 2000). This is unfortunate because comparative optimism is assumed
to impede preventive action. The present study tested whether a road safety training course could reduce
drivers' comparative optimism in high control situations. Results show that the training course efficiently
reduced comparative optimism in high control, but not in low control situations. Mechanisms underlying
this finding and implications for the design of road safety training courses are discussed.