Mount Royal Tunnel
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The Mount Royal Tunnel is a railway tunnel located in Montreal, Quebec, Canada. The tunnel, second longest in Canada, connects the city's Central Station, located downtown, with the north side of the Island of Montreal and Laval, passing through Mount Royal. Until 2014, the only trains using the tunnel were commuter trains from AMT's Deux-Montagnes service. Since December 2014, it is now also used by the Mascouche Line serving the northeastern part of the Island of Montreal, then the suburban communities of Repentigny, Terrebonne, and Mascouche. AMT also wants to reroute its Saint-Jérôme Line trains to Central Station via the tunnel, from their present termini at either Parc or Lucien L'Allier, for a 15-minute time saving.
The tunnel was conceived in 1910 by the Canadian Northern Railway (CNoR) as a means to give the company access to downtown Montreal. The only easy routes along the south side of Mount Royal had long been taken by rivals Canadian Pacific Railway (CPR) and Grand Trunk Railway (GTR). CNoR wanted to avoid crossing the CPR and GTR lines. Likewise CNoR preferred a direct route as opposed to detouring the railway around the north and east sides of Mount Royal.
To finance the costly tunnel option, CNoR planned to develop the low-valued farmland north of Mount Royal into a model community which was named the Town of Mount Royal. CNoR also planned a downtown terminal and associated office and retail developments for low-priced lands at de la Gauchetière Street and McGill College Avenue. Several farms which grew the Montreal melon were bought by the builders to make way for the tracks: "There were two years of preliminary bargaining, after which currency by the satchel full was paid over to the owners of the farms which made the Montreal melons famous, in the purchase of their land. More than $1,500,000 was paid out in that way, with currency, in the rush of land speculation that followed the announcement of the plan. One farmer was paid $117,000 and another farm brought $781,783." 
In 1911, the Canadian Northern Montreal Tunnel and Terminal Company was incorporated to build the tunnel and terminal. It was renamed Mount Royal Tunnel and Terminal Company in 1914, and was a wholly owned subsidiary of CNoR. Construction started at the west portal on July 8, 1912. On December 10, 1913, crews from the east and west portals met beneath Mount Royal; they were out of alignment by 1 inch (2.5 cm). The bore measures approximately 5 kilometres (3.1 mi) and has an ascending grade of 0.6% westbound.
CNoR placed an order with General Electric in 1914 for 6 boxcab electric-powered locomotives for use in the tunnel; they were delivered in 1916–1917. Lining of the tunnel bore with concrete was completed by 1916 and the 2 parallel standard gauge tracks and 2400 V DC catenary were installed by September 1918. Progress was slowed by the First World War and CNoR's ongoing financial difficulties by the mid-1910s.
On September 6, 1918, the insolvent CNoR was nationalized by the federal government when its board of directors was replaced by a government appointed board of management, implemented by the Department of Railways and Canals. At the same time, the newly appointed board at CNoR was directed to take over the operation of the government-owned Canadian Government Railways (CGR). On December 20, 1918, the Privy Council issued an order creating the Canadian National Railways (CNR) to operate CNoR, CGR and eventually other bankrupt private-sector railways. Ironically, the Grand Trunk became part of CNR in 1923, giving CNR better routes to Ottawa and Toronto and relegating the tunnel line to branch-line status. Nevertheless, it still remains an essential part of Montreal's regional transport system.
CNR took over the Mount Royal Tunnel at the time of its completion, along with the virtually empty lands which CNoR's owners, Sir William Mackenzie and Sir Donald Mann, had envisioned would become a signature real estate development. CNR developed this area sporadically from the 1930s to the 1960s, interrupted by the Great Depression and the Second World War.
A new terminal, begun in 1931, opened as Central Station on July 14, 1943, resulting in the closure of the "temporary" CNoR-era Tunnel Terminal near the same location. Central Station consolidated CNR's passenger terminals in the city and also replaced Bonaventure Station which CNR had inherited from GTR. In the late 1950s, the remainder of the CNoR lands acquired in downtown Montreal during the Mount Royal Tunnel project were developed by CNR. The signature Queen Elizabeth Hotel opened in 1958, followed by the CN (name/acronym change in 1960) headquarters building in 1961 and Place Ville-Marie in 1962.
On July 1, 1982, CN signed a 10-year agreement with STCUM whereby CN operated the line under contract to STCUM's commuter rail service. On February 12, 1992, Quebec's provincial government announced a $289 million modernization of the Mount Royal Tunnel line, including $130 million awarded to Bombardier for 58 new commuter rail cars. Stations, track, electrification and signalling systems were all upgraded, in addition to the tunnel structure itself.
On June 2, 1995, the last of the GE boxcab electric-powered locomotives delivered to CNoR in 1916–1917 for use in the tunnel were retired by CN after nearly 80 years of service. The old rolling stock was replaced by 58 state-of-the-art 25 kV AC electric multiple-unit trains built by Bombardier Transportation.
Today, commuter trains from AMT's Deux-Montagnes and Mascouche lines use the Mount-Royal Tunnel. Before 1995, Via Rail trains to/from Northern Quebec and the northern route to Quebec City (cancelled in 1990) also used the tunnel, being hauled up by boxcabs pre-1990, and coasting downhill. This practice was eliminated when the catenary and signalling were replaced in 1995. The old catenary was 3000 V DC (upgraded from the original 2400 V DC in the early 1980s) and the new catenary is 25 kV AC. The new signalling is CTC. The ventilation shaft is too small to allow the use of diesel electric locomotives in the tunnel.
Purchase of line by AMT
On February 28, 2014, the AMT and CN announced that AMT had purchased the Deux-Montagnes line from CN for a sum of $97 million. The agreement gives CN trackage rights for freight trains outside two rush-hour exclusive time windows (08:30—15:30 — 20:30–05:30).
Double-tracking to Roxboro-Pierrefonds
Also in the works is the double-tracking of the line from Bois-Franc to Roxboro-Pierrefonds, which will enable the AMT to significantly increase the number of trains on the line. Currently, there is a second track from Bois-Franc to slightly past Saraguay (about half way between Bois-Franc and Sunnybrooke at the A13), but it is not electrified and is used by CN freight trains serving industries along Doney spur.
On December 1, 2014, the Mascouche line opened to passengers. The line uses the Deux-Montagnes line until Jonction de l’Est (between the Montpellier and Mont-Royal stations), where it turns onto the St-Laurent subdivision on the way to Mascouche. Trains are operated with the new dual-powered ALP-45DP locomotives, and are initially run under electric power to the Mont-Royal station where the changeover to diesel is done.
- John, Kalbfleisch. "Opinion: Extraordinary tunnel vision leads to Town of Mount Royal". The Gazette. Retrieved 19 April 2013.[dead link]
- Dufour, Marc. "CoupeTunnelDouble" (GIF). La ligne de banlieue Montréal - Deux-Montagnes & le réseau ferré de banlieue. Retrieved 2008-05-13.
- Doney spur
- The standard work on the Mount Royal Tunnel is: Clegg, Anthony (2008) . The Mount Royal Tunnel. Montreal: Railfare Books. ISBN 978-1-897190-41-8.
- The Tacoma times. (Tacoma, Wash.), 21 Aug. 1912. Chronicling America: Historic American Newspapers. Lib. of Congress. <http://chroniclingamerica.loc.gov/lccn/sn88085187/1912-08-21/ed-1/seq-8/>
- "CN sells Deux-Montagnes rail line to Agence métropolitaine de transports for commuter rail service for C$97 million". News Articles. Canadian National Railway Company. 28 February 2014. Retrieved 17 May 2016.
- AMT purchases Deux-Montagnes rail line from CN for $92 million[dead link]