Highway 11A/20 Roundabout
Alberta Transportation
Sylvan Lake, Alberta

Al-Terra completed preliminary engineering, design, and construction engineering for intersection improvements at Highway 11A/20 in Sylvan Lake for Alberta Transportation. The four-way stop intersection was replaced with a single lane roundabout with a northbound right-turn bypass lane. The roundabout was designed to accommodate peak traffic through a 20-year horizon.

The roundabout effectively handles large variations in traffic flow, particularly during the summer. Queues have been substantial reduced, if not eliminated, and free flow operations have considerably decreased travel time and delays. To learn more about the benefits of a roundabout, check out this video.