Arbor Road Bridge is an Interstate 80 overpass consisting of two spans that are about 142 ft (43.3 m) and 136 ft (41.5 m) long. It is a horizontally curved bridge with a skew of 31 degrees. The original design used Grade 50 (50 ksi [345 MPa]) weathering steel plate girders and haunched segments spliced over the pier. Due to the high cost of steel girders at the time the project was bid, a value engineering proposal using a precast concrete alternative was approved by the owner. This paper describes a number of innovative designs in this project, including the use of curved precast concrete girders and precast concrete deck panels. Also presented are the girder analysis and design procedures, a description of the production of the precast concrete girders and deck panels, the construction sequence, and a cost comparison between the concrete and steel alternatives.
