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United States. National Highway Traffic Safety Administration

NTL-SAFETY AND SECURITY-Speed Limits

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The Surface Transportation and Uniform Relocation Assistance Act enacted by Congress on April

2, 1987, permitted states to raise the speed limit up to 65 miles per hour, (mph) on their rural

Interstate highways. Thirty-eight states have opted for the higher speed limit on some or all of their

eligible rural Interstates. Congress subsequently directed the National Highway Traffic Safety

Administration (NHTSA) to assess the impact of the increased speed limit on highway safety. This

is the first of three annual reports to Congress on the safety impact of the 65 mph speed limit.

NHTSA - Behavioral Safety Research