diomand lane

carpool lane, HOV lane.
Cali. coll. early 90's
A refrence to the symbol painted on the roadway a diomand to show that the lane is designated to carpoolers (cars with more than 2 or 3 people).

hey, get into the diomand lane! we dont nee to wait in traffic we are carpooling.

by Brion December 9, 2004