ACCIDENTS AND GEOMETRIC DESIGN

A survey of Australian and overseas literature was carried out in an attempt to determine the relationship between accidents and geometric design factors. New South Wales data indicated that horizontal curve radii less than 450 M should be avoided, and that on expressways, gradients above 4 per cent are associated with significantly higher accident rates. Results of overseas studies suggest that for two-lane rural highways pavement widths of 6.8 M corresponding to 3.4 M lane widths may be sufficient. On low volume rural highways narrower pavements, and shoulders, would be recommended if based on economic considerations which include accident costs. /TRRL/

• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • Boughton, C J
• Publication Date: 1975-10

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 24 p.

Subject/Index Terms

• TRT Terms: Alignment; Crashes; Curves (Geometry); Geometric design; Highway design; Highway grades; Layout; Low volume roads; Pavements; Reviews; Road shoulders; Rural highways; Slopes; Traffic crashes; Two lane highways; Width
• Uncontrolled Terms: Horizontal curvature
• Old TRIS Terms: Pavement width
• ITRD Terms: 1643: Accident; 2894: Alignment; 2806: Gradient; 2855: Highway design; 2885: Layout; 6479: Width
• Subject Areas: Design; Highways; Pavements; Safety and Human Factors; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00142738
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: ARR Report No. 44 Monog Ser
• Files: ITRD, TRIS, ATRI
• Created Date: Aug 4 1977 12:00AM