speedboard

Etymology

From speed + board.

speedboard means A board indicating a speed limit. Lexicurio rates it Sui generis — a strength score of 97 out of 100.

noun

A board indicating a speed limit.“Speedboards would provide drivers immediate notification of their speed as they pass the device.”
A skateboard designed for high speed.“"We tend to get a bad rap because we are associated with the punk, vandal stereotype given to skateboarders," Pennell said. "The speedboard world is made up of people who love the sport too much to risk its reputation."”