I-35 Widening Main Street to Indian Hill Road


I-35 Widening

CEC designed approximately 4.5 miles of roadway along I-35 in Norman. Project scope included widening to six lanes, milling and overlaying existing lanes, paving the center median with barrier, and lighting through the project extents. A box extension was designed at Little River. The US-77 overpass was reconstructed with a three-span PC beam concrete bridge. Also included was an overpass bridge located at Rock Creek Road. The plans were completed on a very aggressive schedule to meet the desired ODOT letting dates. Traffic and alignment studies were completed to determine the best and most feasible location of the US-77 alignment.
CEC also prepared a re-evaluation of the old environmental assessment document, including a public meeting, noise studies and several other environmental concerns.
Geotechnical studies were performed to determine the desired typical section and pavement design. The terrain throughout this project is very flat making the design of the drainage very difficult. To assist in the drainage, several underground drainage pipe systems were designed. Another main issue was traffic control and construction sequencing. The existing two lanes in each direction are to be kept open throughout this project, and several construction sequencing and traffic control scenarios were detailed and studied.