One that I find most troubling is when a line of cars are heaped together waiting for a traffic to move. Let's say you're in the bike lane traveling at a reasonable speed. A car to your left ahead of you will pause (Car A) to allow for a car to cross the roadway (Car B) and enter a driveway, or allow for a car to exit a driveway (Car C) while allowing an oncoming car to make a left in front of them. My caution alert, dead zone button flies to alert when these proceedings happen. Just one of those times when I'm on my brake pads cautiously looking at the kindly gesture unfolding. Hey, you didn't ask for my permission to cross the roadway, I aver while applying brakes!