Specifications include, but are not limited to: The improvement to be constructed under this contract shall be performed along the Western Access Tollway (1-490) between Mile Post 4.3 and Mile Post 5.6 in Cook and DuPage Counties, Illinois. The work under this contract includes, but is not limited to, site clearing, earthwork, grading and stockpile construction, haul road construction, protection of aviation operation equipment and utilities, erosion and sediment control measures and landscaping, drainage, construction of box culverts, construction of retaining walls, construction of the Chicago Police Department's K-9 Training Facility, building demolition, watermain relocation, temporary traffic signal maintenance, Intelligent Transportation System (ITS) infrastructure, maintenance of traffic and other miscellaneous work.