There's a four way stop that I always find hazardous. The east-west street is a narrow street, but is a convenient shortcut between two arteries, so it is busy. The north-south street is very quiet and has a cul de sac to the south, so no cars go through, but bikes can access a convenient commuting trail, so we do. So the east-west drivers are stacked up at the stop signs and as each car reaches a stop sign, they tend to stare straight ahead with tunnel vision, without expecting cross traffic, and only paying attention to the car ahead of them which they are following through the intersection. Basically they slow briefly and then go. If you are heading north or south, they often don't seem to expect or notice you, so when you enter the intersection you can't always be sure they will stop. Several times I have thought a car is stopping, and have started to go, only to have them surge across my path within inches of my front wheel.

So I really try to make sure I make eye contact, and if in doubt also ring my bell.