Yardstick
A highway mile marker post.
Definitions
CB slang for the small mile-marker signs along the shoulder. Drivers use them to call out their exact position, hazards, or speed traps without naming an exit. Treat the highway like a giant measuring stick.
Yardstick In A Sentence
Origin & Usage
American CB radio jargon, popularised during the 1970s CB boom when truckers coordinated speed-trap warnings down to the mile.
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