Improving transportation infrastructure is a target issue for the Coalition, and Middlesex 3 is committed to advocating for and assisting with the development of a robust regional transportation system. As part of this commitment, Middlesex 3 launched the M3 TMA (Middlesex 3 Transportation Management Association), and operates a shuttle providing services between the MBTA (at Alewife Station) to stops within the M3 Corridor region.

M3 TMA members have access to shuttle services, alternate transit options like ride-sharing, and promotes the use of cycling to work, and more.

As part of its work on transportation infrastructure, the Coalition also advocates for better public/private transportation options for its members and the region.

The Coalition holds regular Transportation Subcommittee meetings, and offers programming throughout the year on Transportation-related issues.