PB12IN wrote: What happens to peoples minds that makes them think it is ok to ignore the rules on a bike but wouldn't dream of acting like that in their cars.
Enforcement (the lack of).... "I can get away with it"
A feeling that a bike rider is unlikely to hurt someone.... more likely to be injured... so "ride fast and sneaky to get through safe" (not saying I agree with this)
The view (partly true) that devices like traffic lights have only been needed because of "all those damn cars". Not relevant to a bike.
Lack of any programs of bicycle skills and safety training.