Design Manual for Roads and Bridges: Volume 13

Economic Assessment of Road Schemes

Users of this guide for the computer program COBA (COst Benefit Analysis) should refer to the Department of Transport website for a version of this document that is updated at more regular intervals. Please click on the following hyperlink;

(Opens new window)

Access to the latest versions of the software for licence holders of COBA and QUADRO can be found here:(Opens new window) It also provides a support section in the form of frequently asked questions (FAQs) and access to electronic copies of the user manuals.

Quick Links

Find out how to make sure you're seeing the latest version of the site

Further Technical Documents

All the material previously located in the ‘Quick Links’ area of this page can now be found in the new ‘Further Further Technical Information’ section.