A quotation from Judith Martin
Miss Manners is amazed at the number of otherwise gentle souls who turn nasty when they are driving. And they all suffer from the wonderful, ostrich-like delusion that they cannot be identified because they are safely inside their cars. It seems silly to her to have to say what good driving manners are. They are the same as the simplest, most obvious of non-driving manners, except that each person is surrounded by thousands of dollars of treacherous metal.
Judith Martin (b. 1938) American author, journalist, etiquette expert [a.k.a. Miss Manners]
“Miss Manners,” syndicated column (1981-03-29)
Sourcing, notes: wist.info/martin-judith/75509/