i go 10 mph in 15 mph zones just to amplify the silliness of silly speed limits. roads are for cars. stay the fuck out of the road if you are not in a car. school zones are great for this. the 15mph limit backs up a caravan of vehicles going a snails pace past the school, so there are a few hundred pissed off parents picking up their tranny communist kids that can’t exit the school because traffic never clears up. there wouldn’t be an issue if it was 40 mph. this is where i slow down to 10 and maximize that caravan behind me.