Advance green signls for cyclists are a useful and (in other parts of the world) common way of giving bikes a head start, making them more visible by letting them enter the intersection ahead of motor vehicle traffic. When there is no right turn on red, an advance green for cyclists also reduces conflicts between bikes in the curb or bike lane and right-turning cars.
At 16 Ave NW, the advance green for bikes in the 10 St NW bike lane doesn't serve these functions: it's mainly there so that the buses, which share the curb lane at the intersection with bicycles, don't have to wait behind a bicycle at the intersection. The advance signal is only activated when a bus is waiting to cross 16 Ave NW. It is, however, activated for both directions, so cyclists going the opposite direction of a bus get a head start as well.
Still, it's really nice to see this type of traffic control device appear in Calgary, and it is to be hoped that many more will appear around town soon. A recent discussion in the forum indicates that the intersection of 11 St SW and 11 Ave would be a prime candidate for this type of traffic control device.
Cyclists going south on 11 St conflict with cars turning right onto 11 Ave SW. The solution would be to prohibit right turns on red from 11 St onto 11 Ave and provide an advance green for bicycles -- or better yet, a bike box.
This may very well be the northernmost bicycle signal in North America.