Integrating Accident and Travel Delay Externalities in an Urban Speed Reduction Context

认识到事故外部性并不独立于旅行延误，从而节省旅行时间和造成损失，这将推动对旨在减少事故风险的战略进行认真的政策反思。这些证据旨在识别必须计入事故成本的额外外部性，以识别事故成本和限速研究中通常被忽视的其他外部性来源。这可能会对国家道路安全计划的发展产生深远的影响。

The recognition that accident externalities are not independent of travel delays, and hence travel time savings and losses will promote a serious policy rethink about strategies designed to reduce the risk of exposure to accidents. The evidence is designed to identify that additional externality that has to be factored into the accident costs to recognise the other sources of externality typically ignored in accident costing and speed restriction studies. The implication on the development of a national program of road safety is likely to be profound.