Coastal Commission gave the go-ahead for the realignment of SR 76 in western Oceanside, from I-5 to Frontier Drive. However, in February 1990, the Sierra Club, National Audubon Society, and League for Coastal Protection filed a lawsuit to have the approval overturned, citing concerns over the destruction of habitat. The Bonsall bridge was completed in early 1990, while the old bridge became a National Historic Place. In 1992, the City of Oceanside offered to purchase land as additional habitat for the songbird, even though it was not a party to the lawsuit. The following year, the City Council voted to use the Lawrence Canyon land for commercial use instead of for the environmental mitigation, thus stalling the project. Following this, the CTC rejected the proposal to build the highway, requiring Caltrans to find another parcel to use for constructing habitat. The CTC did approve the proposal a month later, provided that this land was found before construction began. In October, the City Council decided to use the Lawrence Canyon land for mitigation after all. Nevertheless, a city councilman raised concerns that the expressway would not be adequate to handle 2010 traffic levels. The four-lane expressway bypass of Oceanside was constructed beginning in 1994. The first from I-5 to Foussat Road opened to traffic in late 1995. The cost of this portion was $10 million (about $ in dollars); at that time, completion of the rest of the route was expected for 2008. The rerouting of SR 76 away from Mission Avenue resulted in a decrease in business for establishments located along the old routing. On June 12, 1996, the groundbreaking ceremony for the second phase of the project took place, by which time the completion date for the entire roadway had slipped to 2010. This phase between Foussat Road and Jefferies Ranch Road was finished in late 1999. Because the expressway was constructed on top of Mission Avenue east of Old Grove Road, the former was rerouted onto a new alignment that connected to Frazee Road. Mission Avenue was thus fragmented, and does not exist between Frazee Road and Jefferies Ranch Road, where the designation resumes. East of Oceanside By 2002, Caltrans had two proposals for the part of the widening project between East Vista Way and Mission Road: building the new highway on top of the old one, or constructing a new roadway to the south of the San