With marijuana now legal in Canada, what will that mean for border crossings?

With recreational marijuana now legal in Canada, officials are warning travelers: Make sure there is no cannabis in the car when you try to cross the international border — in either direction.

Canada legalized the use of marijuana across all provinces Wednesday, allowing sales for recreational use within the country. With Washington state already allowing cannabis sales, it may create some confusion for people who keep recreational amounts with them, said Laurie Trautman, director of the Border Policy Research Institute at Western Washington University.