| Province: | QC |
| Type: | Autoroute |
| Route: | 540 |
| Alternate Name: | Autoroute des Briquets |
| Maint: | Transports Québec |
| Map: | map_A540_2009.png |
| Length Km: | 4.9 |
| Length Round: | 1 |
| Length Ref: | [1] [2] |
| Direction A: | South |
| Direction B: | North |
| Terminus A: | in Vaudreuil-Dorion |
| Terminus B: | in Vaudreuil-Dorion |
| Cities: | Vaudreuil-Dorion |
| Established: | 1967 |
| Decommissioned: | 2012 |
| History: | Replaced by A-30 |
| Previous Type: | A |
| Previous Route: | 520 |
| Next Type: | A |
| Next Route: | 540 |
| Next Dab: | Quebec City |
Autoroute 540 (Vaudreuil-Dorion) was a short spur route that connected Autoroute 20 to Autoroute 40, providing a direct freeway link from Windsor, Ontario (via Highway 401) to Quebec City, Rivière-du-Loup, and points east through A-40, as A-20 currently has several at-grade intersections in Vaudreuil-Dorion as a multi-lane divided road. A-540 was the shortest numbered Autoroute.
In 2006, construction began to extend Autoroute 30 north of the St. Lawrence River (over a new crossing) to the existing junction with Autoroute 540 and Autoroute 20, necessitating reconstruction of that interchange. Once that was completed in December 2012, A-540 was annexed and re-designated as an extension of Autoroute 30, while the old alignment of A-30 south of Salaberry-de-Valleyfield was renamed Autoroute 530. This made the expanded A-30 a ring road serving the southwestern part of the Montreal metropolitan area.
From south to north.