The Western Hemisphere Travel Initiative went into effect after the 9-11 attacks. The intent was to improve and strengthen border control in the United States. Requirements for passengers to carry proper identification mean each traveler can be identified quickly. This is extremely important when the traveler is suspicious.
As of June 1, 2009, travelers entering the United States from Canada or entering Canada from the United States are required to carry a valid passport, regardless of the means of transportation used. There are a few exceptions.
There are a few different forms of identification that are allowed to be used instead of a valid passport. These include a military ID card, passport card or a WHTI complaint document.
Traveling with children is more difficult because it requires extra documentation. If both parents are present, a valid passport is all that is needed. However, if a child is traveling with just one parent or another family member, a note signed by the other parent must be presented, as well. This is to ensure that the child is not being abducted or taken illegally out of the country. If a child under the age of 18 is traveling by herself, a letter from both parents must be presented with a valid passport.
A person convicted of drunken driving and some other serious crimes may not be allowed into Canada. An approval process may take several weeks, so apply many weeks before the travel time. If you are a dual citizen, meaning you are a Canadian and American citizen, present yourself as a Canadian upon entering Canada and an American upon entering the United States. Be sure to have proper identification.
To apply for a U.S. passport visit the State Department's Travel Website: travel.state.edu or call 877-487-2778 to speak with someone at the National Passport Information Center.