Specifications include, but are not limited to: The purpose for the request for proposal (RFP) is to obtain proposals for the development of a Regional Trails Master Plan in coordination with the I-285 Top End Express Lanes project and associated transit planning. The Georgia Department of Transportation (GDOT) is in the process of adding two aerial and at-grade, barrier separated express lanes along I-285 between Paces Ferry Road and GA 400 on the west side. The Top End east express lanes extend from Henderson Road to SR 400, and north on SR 400 from the Glenridge Connector to the North Springs MARTA Station. The Top End 285 project is part of the Major Mobility Investment Program (MMIP) to improve mobility along the northern portion of I-285.