Slow drivers in the left lanes. I dont mean the guy doing the limit and are overtaking a slower a car, I mean the ones doing 20 or more under the posted limit and hold up traffic.
And I agree with everything OP said.
While I'm at it, when someones being pulled over by the cops and they stop in the middle of the road instead of proceeding to the nearest side street or parking lot. Which is a lot safer for the cop, the offender and not hold up traffic. Dont worry people, the nice police man will follow you
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