Changes

A note about the main crossing at A-15 known as "Champlain-Lacolle". It's technically illegal to hitch south from the main crossing as it is an Interstate highway on which pedestrians (including, er, especially hitchhikers) are forbidden. So unless you get a through ride across the border, there are some alternative border crossings to consider other than the main Champlain-Lacolle crossing on A-15 (I-87 on the U.S. side).

Overton Corners (US), 6 km south of the village of Lacolle, is a small crossing mostly used by locals and by those in the know. It connects the Quebec route 221 with NY-276 and is about 2 miles east of the main Champlain-Lacolle border crossing that connects A-15 and I-87. Obviously, it's only useful if you can get a lift near there, but is sometimes worth saving the hassle as border guards from both countries are generally more laid-back here.