Wildlife Crossing overpass! We saw a couple of these completed and four more under construction in
Banff national Park. See the following websites for info:

http://www.pc.gc.ca/eng/pn-np/ab/banff/docs/routes/sec3.aspx

http://www.pc.gc.ca/eng/pn-np/ab/banff/docs/routes/sec3/page12.aspx