Calculating traffic speeds to make roads safer, less congested
Transportation safety professionals and regulatory agencies study how fast traffic is moving so they can better monitor the efficiency of roadways and relate travel speeds to trends in vehicle crashes. This information helps them to develop and oversee programs that promote safe and efficient travel for all types of vehicle.
Westat collected nationally representative traffic speeds for the National Highway Traffic Safety Administration (NHTSA). We provided speed estimates for all vehicle types on different types of roads across all U.S. geographic regions.