Making a U-turn in New Zealand Shows a Valid Route Across Solid Yellow Lines v1

Making a U-turn in New Zealand Shows a Valid Route Across Solid Yellow Lines v1

Classification: Expected Behavior

Decision: UPDATE

Applies To

HERE Routing Services
HERE Navigation Solutions
HERE Map Data
All currently supported platforms and versions where New Zealand road regulations are applied during route calculation

Symptoms

Customers may report one or more of the following:

The route includes a U-turn across solid yellow center lines.
Navigation guidance suggests a U-turn where no physical divider exists.
The route appears to violate traffic rules in New Zealand.
A driver expects a U-turn restriction because of solid yellow lines.
A reported map issue claims that U-turns should not be allowed across solid yellow center lines.

Answer

A route that includes a U-turn across solid yellow center lines in New Zealand can be correct and legally permitted. Solid yellow center lines are generally used as No Passing lines and do not automatically prohibit U-turns unless a specific restriction exists.

Root Cause

A common misunderstanding is that solid yellow center lines act as a legal divider that prohibits all crossing movements. Under New Zealand road rules, solid yellow center lines are primarily intended to prevent overtaking and passing maneuvers where visibility or road conditions make overtaking unsafe.

A U-turn is treated differently from overtaking. Drivers are generally allowed to perform a U-turn when the road is clear, the maneuver can be completed safely, and no specific restriction prohibits it.

As a result, route calculations may legitimately include a U-turn at locations where solid yellow center lines are present.

Impact

Customers unfamiliar with New Zealand traffic regulations may believe the route is incorrect because it crosses solid yellow center lines. This can lead to reports of map errors or routing defects even when the route complies with local road rules.

Expected Behavior

The route may include a U-turn when all of the following conditions are met:

The maneuver can be completed safely.
The road is clear in both directions.
The location is not on a motorway.
No "No U-turn" traffic sign is posted.
No mapped U-turn restriction exists at the location.

Examples:

Motorway Example

U-turns are prohibited on motorways.

Location: View motorway example

Posted No U-turn Example

U-turns are prohibited where a No U-turn sign is displayed.

Location: View No U-turn example



This example is located on Green Lane East southbound at the intersection with Great South Road in Auckland.

Unexpected Behavior

The location should be investigated if any of the following conditions are present:

A route includes a U-turn on a motorway.
A route includes a U-turn where an official No U-turn sign is present.
A mapped turn restriction is missing or incorrectly represented.
Route guidance contradicts verified local traffic restrictions.

Recommended Actions

Verify whether the road is classified as a motorway.
Check for posted No U-turn signs at the location.
Confirm that any local restrictions are represented correctly in the map data.
Follow local traffic laws, road signs, and real-world driving conditions at all times.
Submit a map review request if a valid U-turn restriction is missing from the map.

Additional Information

According to New Zealand Transport Agency guidance, U-turns are generally permitted when they can be performed safely and when no specific restriction prohibits the maneuver. Drivers are not permitted to make U-turns on motorways or where a No U-turn sign is displayed.

Solid yellow center lines are No Passing lines intended to reduce the risk of head-on collisions caused by overtaking maneuvers. These markings do not, by themselves, prohibit a vehicle from crossing the center line to complete a legal U-turn.

Reference:

New Zealand Transport Agency guidance on turning and U-turns

Keywords

New Zealand, U-turn, U turn, solid yellow line, yellow center line, no passing line, routing guidance, route calculation, navigation route, legal U-turn, motorway restriction, no U-turn sign, Oceania regulations, map data, turn restrictions