Ground was broken for the highway project in April 2006, with major construction beginning in May. Caltrans estimated completion in late 2009 for the completion of the four-lane expressway, including a new directional interchange at each end, at which State Route 70 and State Route 99 will exit and enter to the right of the main Oroville-Chico movement. Most access was closed, with Shippee Road providing the sole at-grade crossing of the expressway, and an overcrossing near State Route 70 giving access to local property. Shippee Road was relocated to the southeast, allowing for the future construction of an interchange. In addition, State Route 70 was relocated to the west between SR 149 and State Route 191, and local access on State Route 99 between SR 149 and the Durham Dayton Highway interchange was replaced by frontage roads. The entire project was completed in November 2008, at a cost of $125 million.