True, but you're average commuter in destress can expect a rescue within 20 minutes to an hour, depending on severity.
Even a distressed ship in foul weather can expect a Coast Guard rescue within a reasonable amount of time, provided they have a reliable means of communication.
A shuttle up the creek is more comparable to a disabled submarine in terms of situational complexity.
Not saying its not worth taking the chance to get the job done, but its hardly a jaunt around the Capitol Beltway, despite the traffic we Marylanders inflict on one another.
