MONTREAL -- From CTV Montreal’s second-floor perch at the corner of Papineau and Rene-Levesque, as night fell on the city, staff noticed something peculiar about the Jacques-Cartier Bridge: it was dimmer than before. And this has been true for several days now. “People may not realize it, but the illumination of the Jacques-Cartier Bridge is not turned on by the flick of a switch,” said Nathalie Lessard, the spokesperson for the Crown corporation that manages the Jacques Cartier and the Champlain bridges. The animated lights of the bridge are affected by collected social media data, traffic and weather, which the Crown corporation refers to on its website as the city’s “mood.“