Specifications include, but are not limited to: The work consists of replacing the existing toll plaza; construction of two northbound and two southbound open road tolling (ORT) lanes, and three northbound and three southbound cash/E-ZPass lanes; construction of a precast pedestrian tunnel for employee access and utilities; construction of an Administration Building and access road; reconfiguration of Exit 51 ramps and I-295 Northbound ramp; and demolition of existing toll plaza and reconstruction of the mainline to accommodate approach and departure grade and alignment differentials at the modified plaza for the Maine Turnpike. The work includes earthwork, pavement, concrete, toll plaza demolition and modification, signing, bridge overpass-mounted, overhead sign structures, concrete barrier, guardrail, electrical work, lighting and lightning suppression systems.