Actually, everyone here seems to be considering just the road calming pinch points, but there is actually a more common form of pinch point which occurs when a bus stops (or anything else, but mostly it is buses)
To manage that, I stay back from the bus all the time (what IS it with cyclists and drivers that follow right behind the bus which then stops to their eternal surprise. A bus, stopping? who'da thunk it), moving to primary near any stop (always checking for cyclists and cars first) moving out a bit more if it stops ready to pass, then matching speed to fit pulling out to overtake in traffic just behind some vehicle passing. If at all possible, I try to avoid being the jam in a sandwich. In the unusual event that I don't know I can do it safely, I stop behind the bus.
