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Site updates

5th July – IAN 129/10 added to IANs Page.

24th June – June 2010 DMRB available

17th May – The contents of this website are under review following the formation of a new UK Government. Therefore, there will be no update to the DMRB in May. Update to DMRB due for publication on 24 June 2010. There will be no update to the MCHW.

6th April – IANs 123/10 and 128/10 added to IANs Page

10th February – There will be no update to the DMRB in February 2010.

23rd November – IAN 111/08 superseded, IAN 111/09 added to IANs Page.

Air Quality

Revised Guidance for Air Quality Assessments DMRB 11.3.1

The latest (Opens new window) DMRB Air Quality Spreadsheet (2.2MB Zip File) Version 1.03c (July 2007) containing carbon emission rates based on new webTAG guidance is available to download as a zip file here.

This guidance will be used for air quality assessments of road schemes, multi-modal studies and by local authorities carrying out their second phase review and assessments. Queries relating to this guidance should be addressed to the Project Sponsor for highway schemes or to Defra's helpdesk (lasupport@aeat.co.uk) for local authority review and assessment.

If you would like to be notified of any future changes to the spreadsheet, please send your name, organisation and email address to dmrbaqusers@highways.gsi.gov.uk

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Air Quality

Revised guidance for air quality assessments. Downloadable air quality spreadsheets available.

Highways Agency Accepted EN 1317 Compliant Road Restraint Systems

A list of products that the HA are aware have the required declaration of performance.

Road Restraint Assessment Process (RRRAP)

'Road Restraint Risk Assessment Process (RRRAP) 'Excel spreadsheet which enables designers to establish the need for a vehicle restraint and, if so, its performance requirements.

Safety Barriers

A study on the performance and cost effectiveness of median safety barriers installed on major roads.

Travel of Errant Vehicle Report

A report on how and where errant vehicles travel after leaving the carriageway.

Passively Safe Gantry Risk Model (PSGRM)

The PSGRM has been developed to help designers determine whether or not a passively safe gantry is suitable for a particular site.

Eurocodes

Information on preparations for the use of Eurocodes in the design of UK highway bridges and structures.