55 mph fact book.
Publisher: U.S. Dept. of Transportation, National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Enforcement and Emergency Services Division
Published: 1978
Place of publication: [Washington]
Language: eng
Number of pages: 39
Subjects: Speed limits -- United States.; Automobiles -- Fuel consumption -- Statistics.; Traffic accidents -- United States -- Statistics.
Notes: "DOT HS 803 577."