Is there a link between the car type and the threat to a bicyclist? Not sure if this would be a valid poll because it probably varies a lot depending on what country you live in and in the USA what state you live in and whether you are in a rural or city area, but this still might be interesting to see:
Which type of vehicle have you noticed that seems to more often come very close to you while driving or endanger you in other ways?
For me, it seems like sports cars are the worst offenders as far as coming very close to me while riding on residential streets. Next would probably be large SUVs. Maybe I'm imagining it though.