Built in the hilly areas, Boshan-Laiwu Expressway is 44.086km long, 23m wide (road surface 20.5m wide). It is a fully enclosed overpass, with bidirectional 4-lane and 1.5m wide median barrier. It has three tunnels, 2 grand bridges, 3 big bridges, 2 flyovers, and 1 interchange. The longest tunnel is 814m. The 460m reinforced concrete continuous rigid frame project (located at K9+520) has a span of 75m+135m+135m+75m, which is one of the highest highway bridges in Shandong Province. The project started in October 1996 and was completed and put into use in September 1999.