Guidance

WebTAG: environmental impacts worksheets

Transport analysis guidance (TAG) environmental impact worksheets used to present the results of a transport scheme appraisal as part of a business case.

Documents

Air quality valuation workbook

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Air quality sensitivity workbook: main

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Air quality sensitivity workbook: MECs

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Local air quality workbook

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Biodiversity worksheet

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Greenhouse gases workbook

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Historic environment worksheet

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Landscape worksheet

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Noise workbook

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Noise workbook - aviation

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Townscape worksheet

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Water environment worksheet

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Details

These worksheets are used to present the results of a transport scheme appraisal as part of a business case.

A new noise workbook for aviation proposals was published in December 2017.

In December 2015 the department released a new set of workbooks to aid in the calculation of monetised impacts of noise, air quality and greenhouse gas emissions in appraisal, following spreadsheet best practice guidance. The noise workbook implements changes described in the forthcoming change document on noise valuation, while there are no changes to the method or values for air quality or greenhouse gases.

WebTAG provides information on the role of transport modelling and appraisal, and how the transport appraisal process supports the development of investment decisions and business cases.

Published 29 October 2013
Last updated 31 May 2018 + show all updates
  1. Updated workbooks to reflect new data inputs from the TAG data book v1.10.
  2. Updated workbooks to reflect new data inputs from the TAG data book v1.9.1 and added a noise workbook with extra functionality for the appraisal of aviation proposals.
  3. Corrected noise book published with revised 2010 base year figures from the July 2017 data book
  4. Updated air quality valuation, greenhouse gases and noise workbooks.
  5. Updated air quality workbooks.
  6. Updated workbooks on air quality, greenhouse gases and noise.
  7. Air quality valuation, greenhouse gases and noise workbooks replaced.
  8. Updated workbooks on air quality, greenhouse gases and noise released.
  9. Updated workbooks on air quality, greenhouse gases and noise released.
  10. First published.