U.S. drivers have lack of speed limits across the nation . The maximum legal speed is roughly 80 mph in Poland , Austria , France and a few other countries . Parts of Texas have speed limit of 100 miles per hour . Some researchers skeptical of link between low , high speeds .
U.S. drivers have lack of speed limits across the nation . Parts of Texas have speed limit of 100 miles per hour . Some researchers skeptical of link between low , high speeds .