55 +

Under support from the National Highway Traffic Safety Administration, the National Research Council assembled a committee of 19 individuals with expertise in the various disciplines needed to evaluate the benefits and costs of the 55 mph speed limit and to assess the effectiveness of state laws in inducing compliance. The findings and recommendations of the committee are presented in this report, along with the unresolved issues that surround the appropriate speed limit for selected roads. The committee findings on the consequences of the 55 mph speed limit relate to safety, energy, taxpayer costs, and travel time. Recent trends in motorist compliance and pressures for change are also discussed.