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1.
Highway shoulder. Also, an oxymoron - the last place you want to break down in greater Boston is in the breakdown lane, especially during rush hour, when it becomes the high-speed lane (in some places, even legally). The state has built a series of emergency turn-outs along Rte. 128 so you can pull out of the breakdown lane if, in fact, your car breaks down.
Are car is dying, get into the breakdown lane
by wickedMA February 06, 2004
 
2.
same as heartbreak lane.
a state you are in when a relationship ends or when you 'breakdown' and can't take something anymore
Him and his gf just broke up. She looks as if she just got back from breakdown lane.
by Ashley June 02, 2004