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- W646709080 abstract "This paper reports on an attempt to fit a Poisson linear/log-linear crash prediction model to curves on New Zealand's rural state highways with horizontal radius less than 500 m for use in priority assessment and ranking of improvement schemes. The key predictors of crash risk were found to be the curve speed, the difference between the approach speed and the curve speed, the curve length, the annual daily traffic (ADT), the skid resistance of the road surface, and the approach gradient averaged over 100 m before the start of the curve. Of all these parameters, the curve length term dominates the magnitude of the predicted curve crash risk. The model was applied to the entire rural state highway network of New Zealand to gauge the level of agreement with observed loss-of- control crashes on curves and to assess its potential to assist in the safety management of curves. Loss-of-control on curves remains the largest cause of crashes on rural state highways with a large proportion of these (over 1,200 per annum) occurring on wet roads. The number of curves investigated amounted to 18,771 of which 11,800 (65 per cent) were classified as having a high friction demand. The paper discusses how the prioritisation scheme evolved and the associated cost-benefit implications." @default.
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- W646709080 date "2011-05-01" @default.
- W646709080 modified "2023-09-26" @default.
- W646709080 title "A prioritisation scheme for the safety management of curves" @default.
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