Formal and informal, mainly through the DOT legislative liaisons. Primarily, individual legislative offices interact directly with MassDOT legislative liaisons. The legislative liaisons also testify before the Joint Committee on Transportation on transportation-related legislation and at oversight hearings on certain transportation topics. At times, MassDOT executives provide written and oral testimony to the Joint Committee on Transportation. At the discretion of the governor, MassDOT can file its own bills.