"Complete Streets" is a national movement that includes design principles which encourage and provide for the safety of all users of roadways, regardless of how they travel. With help from the Metropolitan Area Planning Council, the  Middleton Complete Streets Policy (PDF) was drafted and adopted by the Board of Selectmen on November 18, 2014 and updated on January 14, 2020.

The state is actively promoting the concept of "Complete Streets" to help them reach the goal set by the Massachusetts Department of Transportation (MassDOT) to triple the share of walking, cycling, and public transportation trips in Massachusetts. In 2015, MassDOT announced an initial investment of up to $5 million in funding for a "Complete Streets Certification Program." This program will provide competitive funds to towns that have adopted Complete Streets policies to help them carry out their related infrastructure improvements.