Guidelines for marking multi-lane roundabouts

Print version: Guidelines for marking multi-lane roundabouts (PDF, 343 KB, 19 pages)

Definitions

‘Alberta’ exit lane means a lane defined by the lane lines separating traffic in the circulating carriageway and which guide drivers in exiting from a roundabout.

Central island means the circular or other specially shaped traffic island installed within a roundabout around which traffic circulates in a clockwise direction.

Circulating carriageway means the carriageway around the central island on which circulating vehicles travel in a clockwise direction.

Inscribed circle means the circle that may be inscribed within the outer kerbline of the circulating carriageway. This may not always be truly circular.

Multi-lane roundabout means a roundabout with one or more entry and/or exit lanes and part or all of the circulating carriageway designed for or operated as two or more lanes of traffic.

Roundabout means an intersection with one or more marked lanes or lines of traffic all of which are for the use of vehicles travelling in a clockwise direction around a central traffic island.

Spiral curve pavement marking means the pavement marking used to introduce an additional lane within the circulating carriageway of a multi-lane roundabout.

Splitter island means a traffic island placed within a leg of the roundabout separating entering and exiting traffic and designed to deflect entering traffic.

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Page created: 28 November 2008