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RURAL ROAD SAFETY: A LITERATURE REVIEW

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CHAPTER ONE: INTRODUCTION

Background

1.1 The overall aim of this project is to identify, collate and review published research and other information relating to road accidents on rural roads, suggest how it may be applied to the situation in Scotland and provide recommendations for action. Specific objectives are:

  • To highlight the main contributory factors to rural road accidents (i.e. speed, road types, fatigue, driver psychology etc.)
  • To suggest which factors are likely to affect Scotland's rural road network
  • To highlight the particular characteristics of people likely to be involved in rural road accidents
  • To highlight successful interventions that have been introduced to reduce rural road accidents in the UK, Europe and further a field (i.e. enforcement, road engineering, public education etc)
  • To propose short term initiatives that can be taken to reduce rural road accidents
  • To propose long term initiatives that can be taken to reduce rural road accidents
  • To provide recommendations to relevant organisations in order to reduce rural road accidents
  • To highlight gaps in the literature and areas where further research is required.

Search strategy

1.2 Two key documents were used as a starting point for the review. These were The Organisation for Economic Co-operation and Development's "Safety Strategies for Rural Roads" ( OECD, 1999) and The Institution of Highways and Transportation's "Guidelines for Rural Safety Management" ( IHT, 1999).

1.3 From these documents, it was clear that the scope of the topic is huge and therefore a diverse search strategy was adopted. This included keyword searches on the International Transport Research Documentation ( ITRD) database supplemented by internet searches on Google and AltaVista. Abstracts were reviewed and interesting sources obtained. It should be noted that due to the large number of sources identified and limitations of time and resources, only the most important and relevant literature or that which usefully adds to the information contained in OECD (1999) and IHT (1999) is reported in this review.

Definition of rural roads

1.4 Many different definitions can be found in the literature and understanding what is meant by rural is the key to understanding the risks associated with it. Indeed, it has been recognised by the Organisation for Economic Co-operation and Development that the understanding of rural road safety is hampered because "no formal accepted international definition exists to classify rural roads" ( OECD, 1999).

1.5 However, the OECD does give a definition for rural roads as those which are "outside urban areas that are not motorways or unpaved roads." ( OECD, 1999).

1.6 In terms of road safety research in the UK, the concept of a rural road has usually been operationally defined in terms of speed limit. A 'built-up' road is defined as a road having a speed limit of 40 mph or less, and 'non-built up roads' have speed limits of 50 mph or greater. This is the definition adopted by the Scottish road accident reporting system but it does not take account of the area through which the road passes. In other words a road with a 50 mph limit passing through a town (such as the A899 through Livingston) would be classed as non built-up. Non-built up roads encompass a wide range of road types and it is important to address this diversity, e.g. Gardner and Gray (1997) noted that 'Many journeys on rural roads take place on the urban fringe'.

1.7 The Institution of Highways and Transportation ( IHT) recognised that the definition of non-built-up roads would not include many small townships and villages which had lower speed limits but were, in any accepted sense, rural. Therefore, the IHT adopted a definition which included non-built-up roads and roads passing through settlements with a population of less than 3,000 ( IHT, 1999).

1.8 In their review of tourist accidents in Scotland, Sharples and Fletcher (2001) plotted accidents and coded them based on urban and rural definitions where urban was classed as a settlement with a population over 500. They found good correspondence between the use of this system and the use of standard definitions of built-up and non built-up based on speed limits.

1.9 The DfT's speed review ( DETR, 2000) has attempted to classify rural roads to reflect the existing anomalies. The review divides rural areas into three categories: main roads, villages and country lanes. DfT acknowledges that defining a rural village is difficult in relation to settlement size and that achieving a workable definition will require local consultation, as well as research and discussion at a national level between departments and local authority associations.

1.10 In Road Casualties Great Britain 2003 (DfT, 2004a), rural roads are defined as those outside urban areas or in small towns having a population of 10,000 or less.

Outline of report structure

1.11 Chapter 2 describes the size and nature of the problem on Scottish rural roads, and summarises the published accident data for Scotland by road type and mode of transport. Chapter 3 reviews the literature on contributory factors to rural accidents. Chapter 4 reviews the literature on rural road safety interventions. Chapter 5 gives conclusions and recommendations, indicates gaps in the literature and suggests further research required.

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Page updated: Tuesday, July 19, 2005