This describes a situation I run into about once a week. I commute partially via MUP, and there's a spot where the MUP crosses over a busy road. A lot of times I'll get there and one driver will stop, signaling for me to cross. When this happens, I ALWAYS wait until traffic in the other direction has also come to a complete stop. I've had people wave me across, and the traffic in the other direction decides to continue through the crossing at 40 mph. One close call was enough for me to live by this rule.