if you are a us citizen (or visa exempt), what CanV said is correct, you do not need a pr travel document. that is only for people who require visas to travel (ie: fly) to canada. when you drive, all that's necessary is your passport and copr. there is no need for a pr card when traveling by land. the pr card and pr travel document are primarily for airlines that require such items in order to board a plane. a pr card is not a requirement to enter canada, when a person has their copr.