A roundabout is an intersection with an island at its centre. When in a roundabout, you must always keep to the right of the centre island. Roundabouts will be marked with a roundabout sign and can either be single-lane or multi-lane roundabouts.
In a roundabout
At all times, you should signal with your indicators to let other drivers know your intentions. Immediately before leaving the roundabout (i.e. when passing the exit before your exit) you must signal with your intention, unless it is impracticable to do so. For example, the roundabout may be too small to allow your indicator to operate. This tells drivers waiting to enter the roundabout where you intend to exit.
How to use a roundabout on Alberta’s highways
1. Note the appropriate exit.
2. As with any other intersection, choose the correct lane, before entering the roundabout.
3. Slow down as you approach the roundabout, and be aware of crossing pedestrians.
4. Yield to all traffic inside the circular lane, and wait for an appropriate gap.
5. Maintain a safe speed, between 30 and 40 km/h, through the roundabout.
6. Never change lanes within the roundabout.
7. Signal for right turn as you approach the desired exit, while maintaining a safe speed.
Truck aprons
Roundabouts in Alberta have truck aprons around the centre island that provides extra room for semis and multiple-trailer trucks. The rear wheels of large trucks can drive across the truck apron, as they are designed to support the weight of large trucks and help long vehicles turn safely through roundabouts.
Bicycle riders are permitted to turn right at a multi-lane roundabout provided they give way to any vehicle exiting the roundabout. Drivers must remember to look out for those cyclists in the left lane who are giving way to exiting vehicles.
