Generally, the SE portion is 3 continuous lanes, plus an additional lane between interchanges. SB has three continuous lanes all the way from 17th, to the Deerfoot exit. No lanes are added on the left side.
Northbound, the third lane ends just before rounding the corner to turn northbound.
Then, it ends again at 17th. The ending at 17th is a serious bottleneck right now, as within a couple hundred metres, four lanes turns into two (one exiting off to 17th ave), then the EB to NB ramp merges in, THEN, the WB to NB ramp merges in. Once the traffic merges in, traffic begins to speed up a bit again. Adding the third continuous lane, and then adding the fourth lane between 17th and 16th will pretty much solve that bottleneck.
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