Speed limits are for cars; I NEVER approach the limit anymore (don't care, either, a faster ride is over sooner).
Stop signs have become a suggestion, both for cars and for me; I'll stop for traffic, or if a cop is close by.
Red lights are a bit more serious; circumstances have to be just right for me to run one, and that's almost never in the presence of cars.
Also, I use lights in the winter (the only time I ride in the dark), and NEVER salmon in the street (well, there is that little access street, about 150 feet long....one way, coming at me, but it goes to a neighborhood I can get through quietly, as opposed to diving off into the HUGE food bank parking lot). *Guess I should say ALMOST NEVER.......*