Required lane position at intersections

At a typical intersection with multilane approaches, vehicles are required by the UVC to use the right-most lane to turn right and the left-most lane to turn left, unless specifically signed or marked lanes allow otherwise (e.g., double left-turn lanes) (UVC §11-601). Because multilane roundabouts can be used at intersections with more than four legs, the concept of “left turns” and “right turns” becomes more difficult to legally define. The following language (10) is recommended: Unless official traffic control devices indicate otherwise, drivers must make lane choices according to the following rules:

• If a driver intends to exit the roundabout less than halfway around it, the right lane must be used.
• If a driver intends to exit the roundabout more than halfway around it, the left lane must be used.

The Australian Traffic Act (10) gives no guidance for straight through movements (movements leaving the roundabout exactly halfway), and the general Australian practice is to allow drivers to use either lane unless signed or marked otherwise. On multilane roundabouts where the intersecting roadways are not at 90-degree angles or there are more than four legs to the roundabout, special consideration should be given to assisting driver understanding through advance diagrammatic guide signs or lane markings on approaches showing the appropriate lane choices.