See the "Eurasia" section of this article, above. Trolleybus systems run in more than 40 cities, including the interurban Crimean network connecting Simferopol with Alushta and Yalta on the coast. The Crimean trolleybus network includes the longest trolleybus route in the world, the 86-km (54 mi.) route from Yalta to Simferopol. No trolleybus systems are in operation. A new Leeds trolleybus system was given preliminary government approval and funding in March 2010, but cancelled in 2016. In the past, more than 50 systems existed and a large number of trolleybuses have been preserved at British museums. The last trolleybuses in Britain ran in Bradford in 1972. The world's largest collection of preserved trolleybuses is at The Trolleybus Museum at Sandtoft in England. Examples are also preserved at the East Anglia Transport Museum and the Black Country Living Museum in England. Edmonton was the most recent city to abandon its trolleybus network, ending service in May 2009, despite opposition from local citizens. Vancouver is currently the only Canadian city operating trolleybuses, with several other cities considering new trolleybus networks, including Laval and Montréal. TransLink operates a fleet of 262 vehicles in Vancouver, locally known as "trolleys". The city's aging trolley fleet was replaced in 2006–2009 with new low-floor models built in Canada by New Flyer, including 74 articulated units. The trolleys are valued in the Vancouver transit network for their "greener" energy usage and emissions (relying on hydro-electric power), quieter operation over diesels and the high-torque electric motors are well-suited to hilly areas of the city. In Laval, Quebec (within the Greater Montreal area), the transit system operator, Société de transport de Laval (STL), launched a study in spring 2009 into the possible construction of a new, four-route trolleybus system. Funded jointly by STL and Hydro-Québec, the study was completed in 2010. In discussing the Laval study, some provincial officials indicated they would like to see transport agencies in other major Québec cities also consider installing trolleybus networks. At the end of the study, the Laval transit authority decided to experiment with rechargeable battery-powered buses first, before making a decision on whether to proceed with trolleybuses. Among the points noted in the study's findings were that installing a trolleybus system would require a significant initial capital investment in infrastructure, but that trolleybuses are a technology that is known to be able to operate reliably in harsh winter temperatures, whereas it is uncertain whether other types of electric buses would be able to do so, and testing of this is now planned.