sentences:  The strategy, led by Urban Strategies Inc. of Toronto, consulted hundreds of individuals and stakeholders from Cambridge, Kitchener, and Waterloo.Construction began in August 2014 and service was expected to begin in late 2017; however, because of delays in the manufacture and delivery of rolling stock, the introduction of the light rail service was significantly delayed.The total cost of the system was estimated at $818 million, but in December 2017, the overruns were estimated to total approximately $50 million.