We may lower the speed limit on Whoop-Up Drive to 60 km/h, in winter road conditions. We adjust variable speed limit signs to reduce collisions and enhance traffic safety. according to conditions or scheduled road maintenance.
- When conditions start to improve, we will not raise the limit back to 90 km/h immediately. The risk of flash freezing on the bridge deck may still exist, even when conditions look good. This is common early in the morning or late in the afternoon when traffic is heaviest.
- We raise the speed limit when road conditions and the bridge deck temperature have stabilized.
- We track the forecast and conditions to make the speed limit decisions. Lowering the speed limit on the Whoop-Up Drive hill adds a just over a minute to the commute. Your safety is our primary concern.
- Speed limits may also be reduced to accommodate scheduled road maintenance