Highways and Transportation Surfacing Guidelines …

Highways and Transportation Surfacing Guidelines minimum PSV of chippings January 2009 In 2000, the then Department of Highways and Transportation produced a policy that modified the requirements of HD 36/99 within the Design Manual for Roads and Bridges (DMRB). It was applied to the design of new wearing courses (now called surface courses) on all highway works. Background Information In specifying appropriate properties of new surface courses, the minimum Polished Stone Valve (PSV) of chippings, or coarse aggregate in unchipped surfaces , is normally determined from Table HD 36/99 of the Highways Agency s Design Manual for Roads and Bridges. Although it is not obligatory for Local Authorities to comply with the standards in DMRB, it is the long standing practice within Leeds City Council, along with most other Local Authorities, to adopt the DMRB as the basis of design standards.

Highways and Transportation Surfacing Guidelines Minimum PSV of chippings Appendix 1 Table 1: minimum PSV of chippings, or coarse aggregate in unchipped surfaces, for new surface

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