SCAM ALERT: Vehicle licence (rego) renewal phishing emails

ONLINE SERVICES: We currently have an issue with receiving some payments and are working to resolve this issue as quickly as possible. We apologise for any inconvenience.

EASTER WEEKEND – PLAN AHEAD: Heading away for the long weekend? Check our holiday journeys tool(external link)

COVID-19 SERVICES UPDATE: Information on Waka Kotahi services

Back to Resources

Research Report 244 Road surfaces & loss of skid resistance caused by frost and thin ice in New Zealand

Published: | Category: Safety, security and public health , Research programme , Research & reports | Audience: General

The effects of frost and ice on the skid resistance of a range of road surface types used in New Zealand were examined in a laboratory-based study, carried out in 2001-02.

Frost and ice were formed on samples in controlled climate test rooms. In addition the same range of road samples was exposed to natural frost.

Road surface types tested included dense and open-graded asphalts, and both fine and coarse textured chipseals.

Comparisons were made with actual roads in frost conditions. Fine textured road surfaces were found to be very vulnerable to loss of skid resistance in frost and ice conditions. Coarse textured surfaces appeared to retain more of their skid resistance in frost and ice although the increase in skid resistance is small. The implications for road management are examined.

Additional work examined the corrections that should be made to skid resistance results to allow for the effects of very low temperatures (<5°C) on the methods of measurement.

Keywords: asphalt, chipseal, frost, ice, macrotexture, microtexture, New Zealand, pavement, road, road surface, safety, skid resistance, surface, surface texture, texture, traffic

Publication details

  • Author:
  • Published: 2003
  • Reference: 244