Research highlights skidding threat

A TRL report has confirmed that both new stone mastic asphalt and thin surfacings have lower-than-expected skid resistance early in their life, due to their thicker binder film. In wet conditions, the problem only arises at high speed. Skid resistance improves as traffic wear exposes the aggregate. In the dry, the reduction in friction compared with worn surfaces is about 20% at low speeds and 30-40% at higher speeds. TRL endorsed the interim advice from the Highways Agency on displaying warning signs at high-risk locations with newly laid thin surfacings. It is not expected that highways authorities will reduce their use of coated materials as a result of the study. Retexturising will be conducted at high-risk sites. The UK Roads Board is due to publish draft best practice guidelines on the use of thin surfacings.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00396303
• Authors:
  • SILKE, E
• Publication Date: 2005-10-20

Language

• English

Media Info

• Pagination: p4
• Serial:
  • SURVEYOR
  • Publisher: Hemming Group, Limited
  • ISSN: 0039-6303

Subject/Index Terms

• TRT Terms: Bitumen; Friction; Research projects; Safety; Skid resistance; Standards; Surfaces; Surfacing; Thickness
• Geographic Terms: United Kingdom
• ITRD Terms: 4963: Bitumen; 5452: Friction; 8557: Research project; 1665: Safety; 3031: Skid resistance; 187: Specification (standard); 6438: Surface; 2972: Surfacing; 5933: Thickness; 8119: United Kingdom
• Subject Areas: Maintenance and Preservation; Materials; Pavements; Research; Safety and Human Factors; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01019926
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Mar 9 2006 8:22AM