On Fri, 9 Feb 2018 07:07:20 -0800 (PST), jbeattie
wrote:

But I have yet to see a ghost car by the side of the road.

No, people put up memorial crosses and the like where fatal accidents
have happened. It's common enough that the Minnesota Department of
Transportation has policies and guidelines about it. There are mostly
informal policies about ghost bikes in the Twin Cities.