So it looks like the City of Calgary's Standing Policy Committee on Land Use, Planning, and Transportation is going to take another look next Wednesday at building a grade-separated extension of Airport Trail NE under the Calgary International Airport's new parallel runway. The engineers have apparently come up with the bright idea of building a series of bridges over the Airport Trail trench instead of one big long tunnel; in addition to saving about $250-million in up-front capital construction costs, the idea also involves shrinking the width of the necessary right of way for the longest bridge of the lot from 60 metres to 49.8 metres. It needn't be said that I would be happiest with this homemade take on the 49.8 cross-section cobbled together from Page 49 of ABDot's Highway Geometric Design Guide and the geometrical characteristics from Calgary Transit's C-Train technical data:
Dunno whether running storm sewer grates in the shoulders is entirely according to Hoyle, but hey--that's what the CIV E types are for, right?
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