Guidelines for marking multi-lane roundabouts

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

1.   Introduction

• 1.1   Purpose
• 1.2   New traffic rules
• 1.3   ‘Alberta’ method of marking multi-lane roundabouts
• 1.4   Spiral curve pavement markings

1.1   Purpose

The purpose of these guidelines is to assist designers in providing the most appropriate pavement markings for existing and proposed multi-lane roundabouts in New Zealand.

1.2   New traffic rules

With the introduction of the Land Transport (Road User) Rule 2004 and Land Transport Rule: Traffic Control Devices 2004 there is a need for more consistency in the placement of pavement markings at multi-lane roundabouts. Road controlling authorities must now provide for exit lane pavement markings within multi-lane roundabouts. Exit lane pavement markings guide motorists leaving the roundabout so they should not be required to conflict with other circulating or leaving traffic. Sub-clause 10.4(5) of the Land Transport Rule: Traffic Control Devices 2004 states:

• “If a section of the roadway around a roundabout, or an exit from that section of roadway, has more than one lane for motor vehicles, a road controlling authority must, by 30 June 2006, mark lanes to direct the flow of traffic.”

The rule also requires symbolic roundabout give-way signs with ‘Give Way’ supplementary plates to be installed on all approaches to roundabouts by 30 June 2006 and provides for a single white limit line and the marking of a ‘Give Way’ triangle pavement marking symbol on all approaches to all roundabouts.

1.3   ‘Alberta’ method of marking multi-lane roundabouts

Many road controlling authorities around New Zealand have adopted the ‘Alberta’ method for line marking multi-lane roundabouts. A similar approach to providing guidance for drivers circulating multi-lane roundabouts has also been adopted in Australia. This line marking method involves the placement of exit lane pavement markings within the circulating carriageway of a roundabout to separate vehicles and guide drivers through the intersection. ‘Alberta’ exit lane pavement markings combined with clearly marked approach lanes, direction arrows and appropriate signage used on multi-lane roundabouts will give motorists every opportunity to negotiate these roundabouts without conflicting with other circulating traffic. It is recommended they be used on all multi-lane roundabouts.

1.4   Spiral curve pavement markings

Spiral curve pavement markings can be used within a multi-lane roundabout to split right turning traffic to avoid conflict with other traffic entering or exiting the roundabout.

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Page created: 28 November 2008