As described in the final report, the research team conducted an experiment in which posted speed limits were reduced from 70 mph to 55 mph during dusk to dawn hours in key deer activity seasons at six sites in southwestern Wyoming. Drivers reduced their speeds in response to the posted speed limit reduction, but the average reduction was only 3-5 mph. At winter sites, where the reduced speed limit was in effect for seven months, there was no evidence of any reduction in wildlife-vehicle collisions (WVCs).  At migration sites, where the reduced speed limit was in effect for two months at a time, there was some evidence of fewer WVCs, although it was not clear that this could be attributed to the reduced speed limit.  The researchers recommended that a reduced posted speed limit is not an effective measure to reduce WVCs on high-speed rural two-lane highways.