Part 9: Level crossings

Last updated: December 2008. This document ceases to be a controlled document when printed. Please refer to the current version at www.landtransport.govt.nz

4  Traffic signs

4.2  General specifications

4.2.1  Sign size

For permanent traffic signs on urban roads, the smallest sign plate described in Specifications for traffic control devices is normally installed. For example, warning signs would be a minimum of 600 mm × 600 mm. However, 750 mm × 750 mm or larger signs should be installed where the road controlling authority deems it necessary due to traffic conditions and visibility.

On rural roads, the sign size is increased and the largest sign specified would normally be installed where operating speeds are higher than normal (eg 85 percentile speed exceeds 100 km/h). Thus, for warning signs on rural roads operating at normal speeds, the warning sign plate size is 750 mm × 750 mm, while on roads where speeds are higher, 900 mm × 900 mm or larger signs should be installed.

Any supplementary sign component of a traffic sign assembly should match the size of the main component of the combination.

All supplementary signs are mounted 100 mm below the main diamond sign or 100 mm below any other supplementary sign in the order specified.

4.2.2  Placement and number of signs

It is important to carefully assess the placement and orientation of signs at level crossings to ensure a driver approaching from any direction receives adequate warning or instruction.

The alignment of the road relative to the railway line and the location of the level crossing in relation to nearby driveways or intersections can lead to unusual driver approach angles that need to be taken into account. However, these alignment and location issues can also lead to a large number of signs in close proximity with the possibility of:

• some signs being obscured by others; or
• drivers being incapable of fully comprehending all of the messages trying to be conveyed.

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