During the morning peak period (07.30 am to 09.30 am) during school term-time from September 2014 to August 2015 The delay is measured in seconds per mile, which is defined as the difference between morning peak journey time and mean free-flow journey time (2200-0600). Please note that there are a few anomalies, which are probably due to very short links.

Please refer to the legend document for explanation of the delay map keys