Double nickels
55 miles per hour.
Definitions
Two fives = double nickels = 55 mph. Specifically the hated national speed limit imposed in the US by the 1974 Emergency Highway Energy Conservation Act, kept on the books until 1995. Truckers loathed it because it tanked their delivery times and revenue, and 'doing the double nickels' became code for crawling along under the federal limit just to avoid a ticket.
Double nickels In A Sentence
Origin & Usage
1970s trucker slang, coined in response to the 55 mph national maximum speed limit (NMSL) signed by Nixon in 1974 to conserve fuel during the OPEC oil crisis.
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