What do pink traffic signs mean? Reader's Digest, Thomas Pajot/Getty Images Pink traffic signs mean that you should anticipate slowing down, either because of an accident or an obstacle on the road.

In Alberta, all traffic rules apply in parking lots, but whether you have to follow signs depends on who put up the sign, Corporal Troy Savinkoff, Alberta RCMP spokesman, says in an e-mail.

A bilingual road sign in Calgary, Canada. Getty Images ‘One people’ Politically, however, the problem with a debate over bilingual road signs is that it quickly becomes another skirmish in the ...