nothing to stop them from reapplying for an extension when the temporary zoning is near its expiration date. Mostly get it too if there's nothing or no one in the pipeline to properly develop the site.
I have a feeling that those who program the light cycles have simply applied some default timings for now with the ultimate timings being tweaked as real traffic flow data is gathered and analyzed.
heated parkade ramps don't melt the snow to water which then runs down the ramp and into the drains. the snow melts and quickly turns to vapour. There's no build up of liquid water.