the Lucien-L'Allier Metro station just south-west of the Bell Centre, without going outside—a span of as the crow flies, or approximately walking distance. Structural concerns, 2007 closure On Friday, August 24, 2007, construction crews discovered a seven-meter (23 foot) long fissure in the ceiling of an underground corridor linking the McGill station to The Bay store located under de Maisonneuve Boulevard, between Aylmer Street and Union Avenue. The station, the Underground City shops, and above ground streets and buildings were closed to assess whether there was any risk of collapse of the structure. Service on the Métro Green Line was halted between Berri-UQAM and Lionel-Groulx stations until Sunday evening. According to a spokesperson for the Hudson's Bay Company, city workers may have caused the damage by hitting a nearby pillar. During the weekend, city workcrews worked non-stop to shore up the sagging slab of concrete, installing more than 1,000 temporary metal supports. On Monday, August 27, 2007, service was restored to the Green Line, and all streets but the block of de Maisonneuve boulevard between Union and Aylmer were reopened to traffic. The one block that was not open to traffic was open to pedestrians. All buildings reopened, including The Bay. Officials said that it would take months to fix the problem. While inspecting the site, it was discovered that 2021 Union, the Parkade Montreal building, was in danger of having concrete side panels fall off. City engineers performed emergency repairs. A report later blamed the construction of a bike path for the damage. Street traffic on De Maisonneuve resumed in March 2008. Central segment The central segment interconnects the following seven Metro stations via indoor walkway. As the Berri-UQAM station, which allows transfers between the Green, Orange and Yellow lines, is two Metro stops from the closest station in this segment, in many cases it is quicker to walk than to take the Metro. The lists of connected facilities which follow are grouped by segment and nearest Metro station. Bonaventure Place Bonaventure STM headquarters (access to Square-Victoria-OACI Metro station via ICAO Building) Place Ville-Marie (access to McGill Metro station via Le Centre Eaton) Édifice Gare Windsor – former Canadian Pacific Railway headquarters (access to Lucien-L'Allier Metro station via Bell Centre) 1250 René Lévesque Place du Canada – Château Champlain Hotel Central Station – Via Rail, AMT and Amtrak Les Halles de la Gare CN headquarters Queen Elizabeth Hotel Le