Out in the rural areas, I stop. When I've been on tour by myself and stopped to rest or eat, other cyclists *always* stopped. It's a great way to meet people

I have yet to come across an injured and alone cyclist, thank goodness.

Riding for transportation here in town, I don't always stop when I see someone with mechanical trouble. There are 6 bike shops along my 5 mile commute. We have a good bus system and cab service. Cyclists who can't or don't feel like doing the repair on the spot have multiple options to get where they are going; most of the university students aren't going very far in any case. If the stopped cyclist looks upset, I stop and see if I can help. However, if he or she looks calm and is walking with purpose, I figure that the situation is under control and generally I go on. When I've had flats, I seem to get the same treatment. If I've already got the wheel off and my hands dirty, a few people might stop to see if I've got everything I need. When I got a flat and decided to walk it out to the shop (not wanting to sit down on a muddy curb) tons of people stopped to make sure I was all right.