I see this all the time with scooters. They're motor-vehicles. Riders are supposed to drive in the lane, but here's the rub: they don't. I see it all the time.

I see this all the time with scooters. They're motor-vehicles. Riders are supposed to drive in the lane, but here's the rub: they don't. I see it all the time. Scooter drivers hug the edge of the road. They do so at their own peril. The drivers behind them are confused. Does the scooter want them to pass? Is it even legal to pass right now; there's a double-yellow (no passing in the US) line on the road? Let's accept the argument here and say that drivers of this vehicle do drive in a lane. They are, at that point, putting themselves on equal footing with other drivers. Driving 20 MPH on just about any street where the speed limit is above 25 MPH is a disaster waiting to happen. You can't simply tell other drivers that they're allowed to and expect them not to be frustrated. Frustration leads to aggressive driving, and aggressive driving leads to accidents. Accidents are highest when vehicles traveling at different speeds encounter each other. That is a statistical reality. Putting a "car" limited to 20 MPH -- with very, very little in the way of crash protection -- on the road with other, much heavier, automobiles is a horrible idea.