| Autoroute 25 | ||||
|---|---|---|---|---|
| Autoroute Louis-H.-La Fontaine | ||||
|  | ||||
| Route information | ||||
| Maintained by Transports Québec | ||||
| Length: | 21.8 km (13.5 mi) | |||
| Existed: | 1967 – present | |||
| Major junctions | ||||
| South end: |   A-20 (TCH) in Longueuil | |||
|   A-40 (TCH) in Montreal  A-440 in Laval  A-640 between Terrebonne and Mascouche | ||||
| North end: |   Route 125 / Route 158 in Saint-Esprit | |||
| Location | ||||
| Major cities: | Boucherville, Montreal, Laval, Terrebonne, Mascouche | |||
| Highway system | ||||
| 
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Autoroute 25 (or A-25, also called Autoroute Louis-H.-La Fontaine in Montreal) is an Autoroute in the Lanaudière region of Quebec. It is currently 49 km (30.4 mi) long and services the direct north of Montreal's Metropolitan Area. The A-25 has one toll bridge, which is the first modern toll in MMA and one of two overall in Quebec (after being joined by the A-30 toll bridge, which opened in 2012).
A-25 begins at an interchange with Autoroute 20 and Route 132 in Longueuil and quickly enters the Louis Hippolyte Lafontaine Bridge-Tunnel into the east end of Montreal. It is the main north-south freeway in the east end of Montreal (actually northwest-southeast but perpendicular to the St. Lawrence River).
Before the Montreal-Laval Extension, a gap existed in A-25 north of the interchange with Autoroute 40. Instead it followed Boulevard Henri-Bourassa to Boulevard Pie-IX, both of which are principal urban arterial roads. Boulevard Pie-IX north of Boulevard Henri-Bourassa was used as a temporary section of Autoroute 25 across the Rivière-des-Prairies to Autoroute 440. From there, A-25 proceeded east with A-440, then continued north and east of Laval.