Bikes must stop if a bike path or trail crosses a roadway. The cyclists even have a stop sign to let them know in case they don't know the law.
Around here many motorists stop for cyclists because they (the motorists) don't know the law.
These are probably the same motorists that I see on my daily commute. They are already at a stop sign and have the right of way because I'm still 1/2 block from the intersection, yet they wait for me to get to the intersection and wave me through. I never fall for that one and point to "my" stop sign and tell them they have the right of way. Idiots!