# Quebec Autoroute 25

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. A-25 has one toll bridge, which is the first modern toll in the Montreal area 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 A-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.
The designation of Autoroute Louis-Hippolyte-Lafontaine is named after Louis Hippolyte Lafontaine, a 19th-century Lower Canada leader of what was then the Province of Canada.
A-25 is also part of the Trans-Canada Highway between the A-20 and A-40 interchanges.

## History
### Construction history

| Kilometre | Kilometre | Year | Notes |
| 0 to 4 | 0 to 4 | 1967 | Louis Hippolyte Lafontaine Bridge-Tunnel |
| 4 to 7 | 4 to 7 | 1966 | Avenue Souligny, Montreal to A-40/TCH, Montreal |
| 7 to 10 | 7 to 10 | 2002 | A-40/TCH, Montreal to Boulevard Henri-Bourassa, Montreal |
| 10 to 17 | 10 to 17 | 2011 | Boulevard Henri-Bourassa, Montreal to A-440, Laval |
| 12 to 44 | 12 to 44 | 1971 | From A-440, Laval to Chemin du Ruisseau Saint-Jean, Saint-Roch-Ouest |
| 44 to 46 | 44 to 46 | 1999 | Ruisseau Saint-Jean, Saint-Roch-Ouest to Rue Montcalm, Saint-Esprit |
| 46 to end | 46 to end | 2001 | Rue Montcalm, Saint-Esprit to Route 125, Saint-Esprit |
| Source: ||||

### Montreal-Laval extension

Autoroute 25 has been extended under a public-private partnership. The 7.2 km section of highway joins the southern part of Autoroute 25 at Boulevard Henri-Bourassa in Montreal's East end and the northern part at Laval's Autoroute 440. The $207-million project will save some $226 million for the province since a private consortium will assume any cost overruns. A toll bridge using a RFID transponder automatic payment system spans the Rivière des Prairies and costs transponder-owning motorists $3.20 per crossing at peak hours (6-9 AM and 3-6 PM) and $2.24 per crossing the rest of the day. An additional $5.34 in administration fees is charged for motorists without transponders. The road opened on May 21, 2011. The highway has six lanes (three in each direction), while the bridge features three lanes in each direction with one reserved for public transit.
Now that the link between Montreal and Laval is complete, the temporary autoroute section connecting Boulevard Pie-IX to Autoroute 440 lost its A-25 designation. The new route designation for this section is Route 125.
The new span effectively joins the North Shore, Laval, Montreal, and the South Shore.
Environmental organizations have raised concerns that the highway extension will lead to an influx of automobiles entering Montreal and increase development pressure on agricultural land in Eastern Laval.

## Exit list

| RCM | Location | km | mi | Exit | Destinations | Notes |
| Longueuil | Longueuil | 0.0– 0.4 | 0.0– 0.25 | – | A-20 (TCH) east to A-30 – Québec, Sorel-Tracy, Aéroport Saint-Hubert | A-25 southern terminus; roadway and Trans-Canada Highway continue as A-20 east |
| Longueuil | Longueuil | 0.0– 0.4 | 0.0– 0.25 | 90 | A-20 west / R-132 to A-15 – Varennes, La Prairie, Aéroport P.-E.-Trudeau, USA | A-20 west exit 90; R-132 / A-20 east exit 89 |
| Saint Lawrence River | Saint Lawrence River | 0.4– 0.9 | 0.25– 0.56 | Pont Louis-Hippolyte-La Fontaine | Pont Louis-Hippolyte-La Fontaine | Pont Louis-Hippolyte-La Fontaine |
| Saint Lawrence River | Saint Lawrence River | 1.1 | 0.68 | 1 | Île Charron, Îles-de-Boucherville Park | |
| Saint Lawrence River | Saint Lawrence River | 1.7– 3.1 | 1.1– 1.9 | Tunnel Louis-Hippolyte-La Fontaine | Tunnel Louis-Hippolyte-La Fontaine | Tunnel Louis-Hippolyte-La Fontaine |
| Montréal | Montréal | 3.6– 3.4 | 2.2– 2.1 | 3 | Rue Notre-Dame | Southbound exit |
| Montréal | Montréal | 4.1– 4.7 | 2.5– 2.9 | 4 | Montréal Centre-Ville | Access via Avenue Souligny |
| Montréal | Montréal | 5.4 | 3.4 | 5 | Rue Sherbrooke (R-138) / Rue Hochelaga / Rue Notre-Dame | Signed as exits 5E (east) and 5O (west) northbound |
| Montréal | Montréal | 5.4 | 3.4 | 5 | Rue Beaubien / Boulevard Yves-Prévost | Northbound exit is via exit 5O |
| Montréal | Montréal | 6.4 | 4.0 | 7 | Boulevard Wilfrid-Pelletier / Boulevard Châteauneuf | Northbound exit |
| Montréal | Montréal | 7.1 | 4.4 | 6 | Rue Beaubien / Boulevard Yves-Prévost | Southbound exit |
| Montréal | Montréal | 7.6– 8.5 | 4.7– 5.3 | 8 | A-40 (TCH) – Trois-Rivières, Québec, Gatineau, Ottawa, Aéroport P.-E.-Trudeau, Aéroport Mirabel | Trans-Canada Highway follows A-40 west; signed as exits 8E (east) and 8O (west); A-40 exit 80 |
| Montréal | Montréal | 9.0 | 5.6 | 9 | Rue Bombardier | Northbound exit |
| Montréal | Montréal | 9.3 | 5.8 | 10 | Boulevard Henri-Bourassa / Boulevard Perras / Boulevard Maurice-Duplessis | Northbound exit |
| Montréal | Montréal | 11.5 | 7.1 | 9 | Boulevard Henri-Bourassa / Rue Bombardier | Southbound exit |
| Montréal | Montréal | 12.9 | 8.0 | 10 | Boulevard Perras / Boulevard Maurice-Duplessis | Southbound exit |
| Rivière des Prairies | Rivière des Prairies | 12.9– 14.2 | 8.0– 8.8 | Pont Olivier-Charbonneau (tolled) | Pont Olivier-Charbonneau (tolled) | Pont Olivier-Charbonneau (tolled) |
| Laval | Laval | 14.3 | 8.9 | 14 | Montée Masson (R-125) / Avenue Marcel Villeneuve / Boulevard Lévesque | No southbound signage for Route 125 |
| Laval | Laval | 15.5– 17.5 | 9.6– 10.9 | 16 | A-440 west (Autoroute Jean-Noël-Lavoie) | Eastern terminus of A-440; exit 35 on A-440 |
| Laval | Laval | 19.8 | 12.3 | 20 | Boulevard des Mille Îles | |
| Rivière des Mille Îles | Rivière des Mille Îles | 20.1– 20.3 | 12.5– 12.6 | Pont Lepage | Pont Lepage | Pont Lepage |
| Rivière des Mille Îles | Rivière des Mille Îles | 20.6 | 12.8 | 21 | Île Saint-Jean | |
| Rivière des Mille Îles | Rivière des Mille Îles | 21.0– 21.2 | 13.0– 13.2 | Pont Mathieu | Pont Mathieu | Pont Mathieu |
| Les Moulins | Terrebonne | 21.5 | 13.4 | 22 | R-344 (Boulevard des Seigneurs) – Terrebonne Centre-Ville | Northbound exit and southbound entrance; signed as exits 22E (east) and 22O (west) |
| Les Moulins | Terrebonne | 22.3 | 13.9 | 23 | R-337 (Boulevard Moody / Chemin Gascon) – Terrebonne Centre-Ville | |
| Les Moulins | Terrebonne | 24.4 | 15.2 | 24 | R-125 (Montée Masson) / Rue Grande-Allée | Southbound exit shares a ramp with exit 25 |
| Les Moulins | Terrebonne | 25.5 | 15.8 | 25 | A-640 to A-40 – Repentigny, Québec, Saint-Eustache, Mirabel Airport | A-640 exit 42 |
| Les Moulins | Terrebonne | 26.4 | 16.4 | 25 | Avenue de l'Esplanade | Standalone interchange that shares ramp with exit 25 |
| Les Moulins | Mascouche | 28.4 | 17.6 | 28 | Chemin Sainte-Marie – Mascouche Centre-Ville | |
| Les Moulins | Mascouche | 29.8 | 18.5 | 30 | Chemin Saint-Pierre | |
| Les Moulins | Mascouche | 34.3 | 21.3 | 34 | Chemin Saint-Henri – L'Épiphanie | |
| Montcalm | Saint-Roch-de-l'Achigan | 38.6 | 24.0 | 38 | Rue Armand-Majeau | Northbound exit and entrance |
| Montcalm | Saint-Roch-de-l'Achigan | 41.0 | 25.5 | 41 | Rang du Ruisseau-des-Anges S | |
| Montcalm | Saint-Roch-Ouest | 44.3 | 27.5 | 44 | R-339 / R-125 south – Saint-Roch-de-l'Achigan | South end of R-125 unsigned concurrency |
| Montcalm | Saint-Esprit | 47.3 | 29.4 | 46 | R-158 west – Saint-Lin-Laurentides, Saint-Jérôme | South end of R-158 concurrency; A-25 becomes unsigned; R-125 becomes signed |
| Montcalm | Saint-Esprit | 48.6 | 30.2 | – | Rue Montcalm / Rang de la Rivière S | At-grade (traffic signals) |
| Montcalm | Saint-Esprit | 49.3 | 30.6 | – | R-125 north – Sainte-Julienne, Rawdon, Saint-Donat R-158 east – Joliette, Saint-Jacques | A-25 northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Electronic toll collection Incomplete access Route transition |||||||