Origin of off-ramp
Examples from the Web for off-ramp
At least a plan to the effect of stating some kind of exit strategy, an off-ramp, would be refreshing; I haven't seen one.Skepticism About Syria Isn't A Left Or Right Problem|Ali Gharib|June 24, 2013|DAILY BEAST
But if I had to guess, I'd say that option 4, the off-ramp, will look less unappealing that the other three options.
The justices did show a lot of interest in a fourth option: an off-ramp.