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1973 oil crisis

National maximum speed limit of 55 mph (89 km/h)

1974
U.S.

To help reduce consumption, in 1974 a national maximum speed limit of 55 mph (89 km/h) was imposed through the Emergency Highway Energy Conservation Act. Development of the Strategic Petroleum Reserve began in 1975, and in 1977 the cabinet-level Department of Energy was created, followed by the National Energy Act of 1978.


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