I'd like to see the actual plans because this could either be done very poorly, or somewhat ok. 14th and 12th handles a lot of movement and having bicycles in the rightmost lane could serious fubar the light sequence. Saying this as someone who would probably use this almost every day once implemented.
Huge and awesome news! 12th Avenue has become the backbone of Beltline cycling and is a big reason for the big growth in bicycle counts and the increasingly urban vibe of the neighbourhood. This is a huge move for Calgary's bicycle users. And an opportunity to address some deficiencies (beyond the lane jogging for cars):
If I am imagining this correctly, I would assume the bicycles are in the left-most lane of 12th Avenue (as they are now). I would also assume they would implement it similarly to the existing 12th Ave; where major turning movements have dedicated turn-cycles for cars that preempt cycle movements. This is a huge pet-peeve of mine as it undercuts bicycle efficiency significantly for often trivial / negligible auto throughput, particularly outside of rush hours where there is little turn movements from 12th Ave to 11th, 9th, 8th or 4th Streets northbound.
The turn-cycles from 12th Avenue onto 4th and 9th Streets northbound are the most egregious; 4th because the turn cycle is like 30 seconds long *for every cycle all day and night* which is only required for that length of time for about 15 minutes of rush-hour. 9th because it's a side road and has no traffic (or at least any more traffic than any of the intersections where they didn't bother with turn-cycles).
The final pet peeve of mine is MacLeod's weird bicycle-preemption; where bicycles get 5 seconds out of every 12th Avenue eastbound green to cross ahead of the cars, then get a red signal for the rest of the green and subsequent MacLeod Trail northbound. Results in an almost certainty that a east or westbound bicycle will be stopping for a full (or longer) light cycle. Really weird, because none of the other signals are like this (causing confusion) and the pedestrian signal is normal (causing further confusion)
Perhaps all my complaints are reasonable trade-offs to slowly eek out acceptance of bicycles from the complete car-culture hegemony we find our society in. But would be nice to do some minor tweaks (e.g. no turn signals outside rush hours to improve after-rush cycling, tighten up the cycle-length to avoid long bicycle wait-times etc.)
At any rate, exciting times ahead! Can't wait to go to Sunalta!