They've been closing off the North side of Broadway the last two days so I assume they are doing work at Quebec with the new intersection for buses.
EDIT: Looks like they might be installing new traffic signals. They just announced the closure will start at 7AM on Jan 26th.
https://trafficcams.vancouver.ca/mainBroadway.htm
https://www.broadwaysubway.ca/construction/current-work/
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