We use cookies to collect information about how you use data.gov.uk. We use this information to make the website work as well as possible.
You can change your cookie settings at any time.
Help us improve the National Data Library - complete this short survey
Source Lden Lnight Lday Levening LAeq,16hr Major RoadsThose which have more than three million vehicle passages a year (for mapping rounds other than Round 1)The...