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TOPIC:
WHEN SAFETY MESSAGES MAKE US LESS SAFE: EVIDENCE FROM TRAFFIC FATALITY MESSAGES
ABSTRACT
We provide evidence that displaying roadside fatality counts on highway dynamic message signs (DMSs) result in significant increases in traffic accidents directly downstream of the DMSs. We exploit detailed data on DMS and accident location, DMS log files, and a unique setting in Texas where fatality messages are instructed to occur only during one week each month. We further find that the association between fatality messages and subsequent accidents is increasing in the reported fatality count, suggesting that drivers become nervous and drive less safely when presented with shocking statistics.