QUOTE=PatrickGSR94;18366507]... The only place where I have used such a device while on my bike is where a bike path (MUP) crosses a few busy roads, one of them being off-limits to cyclists according to the signage. That's the only place IMHO where these are justified.[/QUOTE]

That nearly describes the situation I described above. Taylor and Salmon are quiet residential streets but bicycle highways that cross the 4 lane Caesar Chavez Avenue. At rush hour a huge pain to cross in a car. The bike buttons are right beside the street, easily reachable without putting your foot down (although you are going to have to unless you can trackstand for a while).

This setup encourages bikes but not cars to use the street. (Cars cannot activate anything. It is stop sign only for them. So when CC Ave is busy, it could be a long wait unless there are bikes!

Ben