The author suggests that on an average road improvement scheme the drainage element is about 10 per cent of the construction cost. Whereas the expenditure on drainage relative to the total highways maintenance budget is possibly in the order of 3 per cent to 5 per cent. Maintenance problems are considered in relation to the cost effectiveness of expenditure on appropriate measures, the development of deflectograph and deflection beam techniques, and the effect of inadequate drainage on the long-term performance of a pavement. Consideration is given to pavement strength related to the strength of the subgrade as affected by an increase in moisture, and the effect of wet weather during construction on CBR values discussed. Developments in the use of fabric membranes are described and information provided on applications of their use. The sealing of carriageways is considered in respect of surface dressing techniques and the development of new surfacing materials. (TRRL)

  • Availability:
  • Corporate Authors:

    Embankment Press Limited

    Building 59, GEC Estate, East Lane
    Wembley, Middlesex HA9 7TQ,   England 
  • Authors:
    • Roadman, C
  • Publication Date: 1979-6

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 5-7
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00303002
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jan 30 1980 12:00AM