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Research Report 092 Road weather information systems (RWIS)

Published: | Category: Research & reports , Research programme , Performance monitoring , Activity management , Natural hazard risk management , Safety, security and public health , Environmental impacts of land transport , Transport demand management , Integrated land use and transport systems , Sustainable land transport , About the research programme , Economic development | Audience: General

Ice, frost, snow, fog and high wind are relatively common hazards on many New Zealand roads, and road weather information systems (RWIS) could be expected to make a significant contribution to road safety.

A review of the international scientific and trade literature undertaken in 1994 identifies the nature of RWIS, their capabilities, the benefits arising from their use, and the costs associated with their installation and maintenance.

Potential application of RWIS for icy road conditions in New Zealand is considered by reviewing weather and traffic conditions, accident rates and winter maintenance operations on two segments of state highways that are subject to ice and snow.

Publication details

  • Author:
  • Published: 1997
  • Reference: 92

A PDF scan of this NZ Transport Agency research report is available from