The vaguely-triangular strip of road separating a highway exit from the actual off-ramp. So named because drivers will use the space to stop and make decisions, merge through to the off-ramp after making split-second decisions, and/or crash into water-filled barrels or exit signs contained therein after failing to properly make a decision.
(To a passenger) Did you see that guy cut through the decision lane?
(To another driver) Nice use of the decision lane, idiot!
(Relating a story) Ted really needed to stop, so he parked in the decision lane.
(Relating directions) You can merge off the ramp that's next to the decision lane without any barrels.
by Stephen Anthony Uy July 15, 2006
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