The aim of this project was to look at the distribution patterns and patterns of speeding of heavy vehicles on the road as measured by traffic surveys conducted at 20 fixed speed cameras sites in NSW over the period 1999-2001. The results demonstrate that heavy vehicles were less likely to be speeding overall, but especially on metropolitan, unclassified and low speed zone roads. There was less difference in the speeding patterns of light and heavy vehicles on country non-urban roads, state highways and high-speed zones, especially 110kilometres per hour. Consistent with the finding of lower levels of speeding for heavy vehicles, the analysis showed that speed-related crash rates were lower for heavy vehicles, particularly on country non-urban roads, for state highways and 100 kilometres per hour speed zones. Although country urban regions and speed zones of 80 and 90 kilometres per hour had higher rates for heavy vehicles compared to light vehicles, the percentage of heavy vehicles that were speeding was still lower than for light vehicles. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E210298.
Abstract