Transportation

LD 1138 requires Maine's Department of Transportation and the Maine Turnpike Authority to conduct greenhouse gas emissions and traffic impact assessments before approving new road expansions or capacity increases (like adding lanes or improving roadways). Starting July 1, 2026, these assessments must project 20-year emissions, net changes in vehicle miles traveled, and account for "induced demand" (increased driving from new road capacity). Projects found inconsistent with Maine's climate targets must be redesigned, include mitigation measures, or be canceled. The bill directly affects transportation planning decisions for state road projects and aims to align infrastructure development with the state’s climate action goals.