This is really the big problem, but it's solved if it's implemented with a simultaneous crossing for bikes & pedestrians (aka scramble intersections). Without that, turning left means waiting through two (sometimes three!) red lights.

Source: we have one of these here in Cambridge (UK) and they haven't implemented the simultaneous crossing. It's untenable, so cyclists (myself included) do all sorts of dangerous things just to avoid the ridiculous wait times.