When there is a slow truck truck in the right line and 5-10 cars in a LINE trying to pass it then it is a LINE and the person what speeds up to cut the line and wait for either a weak driver or try and muscle his way into the front is an ASS.

You’re leaving a gap in the line which means line cutters can swoop in.

Science!

 The morning queue at your local Starbucks is much lower stakes