The neponset valley TMA is a member-based organiztion that was founded in 1995. The nvtma is an action-oriented organization that provides the leadership and technical support in combining the resources of the public and private sectors to maximize mobility in several communities located in the neponset valley region of massachusetts. The nvtma's mission is to provide critical transportation services needed to enhance economic vitality, while minimizing the impact of development, maintaining access, and making efficient use of and/or working to improve public transportation.