Quebec Autoroute 35

Autoroute 35 (A-35) is an Autoroute in the region of Montérégie, Quebec, Canada. With the first section constructed in the 1960s, the A-35 links Saint-Jean-sur-Richelieu with Montreal via the A-10. The A-35 is also the primary route for traffic between Montreal and Boston, although it ends 13.4 km (8.3 mi) short of the U.S. border. South of its current terminus in Saint-Sébastien, the A-35 continues as two-lane Route 133 (which becomes four-lane divided 6.5 km (4.0 mi) north of the border) to the border. An extension of A-35 to meet Interstate 89 at Saint-Armand would have completed a nearly 500 km (310 mi) limited-access highway link between Montreal and Boston. It had been scheduled to open in 2017, but was delayed until 2023, and then delayed again until 2025, with the final segment from the border to 6.5 km (4.0 mi) north of it cancelled in March 2025.

Like many Quebec Autoroutes, the A-35 also has a name: Autoroute de la Vallée-des-Forts (Forts Valley Highway). The name refers to a chain of forts built by the French in the Richelieu Valley during the 17th and 18th centuries to defend their colonial settlements from the Iroquois. The A-35 used to be known as Autoroute de la Nouvelle-Angleterre (New England Motorway), referring to its role as a link between Quebec and New England.