They are mainly used in trouble spots on rural highways such as when approaching a sharp corner or a single-lane bridge.
There is room to park on either side and walk across or under the single-lane bridge.
The road is sealed and two-lane, with some single-lane bridges.
The Haast River bridge (km 750.0) is now the longest single-lane bridge in the country, with two passing bays.
About 55 kilometres in length, it is mostly two lane, with a few single-lane bridges.
It is now open again, without load restriction, as a single-lane bridge.
In 1910, a single-lane bridge was built and strengthened the economic success of the area.
The single-lane bridge at Richmond Street which allowed this entrance still exists, but is closed to traffic, and the remainder of the ramp has been demolished.
The single-lane wooden bridges punctuating the five-mile drive led us over brimming rivers dotted with fallen hibiscus flowers.
USAID assisted with the repairs and it was converted to a single-lane bridge for vehicle traffic.
