MassDOT Highway Division issued Engineering Directive E-20-005, Guidance on Traffic Count Data. This directive, dated May 11, 2020, provides guidance on how to estimate existing and future traffic counts in lieu of taking new traffic counts after March 13, 2020, when COVID-19 restrictions were implemented in Massachusetts. Traffic counts taken in 2020 may undercount the baseline for which future years are based.
This directive introduces new MassDOT Guidance on Traffic Count Data, dated April 2020, which supersedes Section I.B (Traffic Volumes) of the Traffic and Safety Engineering 25% Design Submission Guidelines. For additional information and guidance regarding traffic data in Massachusetts, please also refer to the Traffic Volume and Classification page on mass.gov.