T0531 QUADRO - Updating Roadwork Delay Methodology

QUADRO, as a tool, was created prior to 1982 and allowed first 24-hour maintenance jobs to be assessed and then, as time passed, more complex maintenance schemes over 30 and later 60-year periods. The theory that underpins QUADRO continued to develop over the 1990s but has seen no fundamental updates since around that time, except for the addition of a limited carbon impact appraisal in the 2010s. The parameters that feature in the mathematical theories have, in some cases, been updated, particularly where these re...