1986. It was dedicated at a community celebration on July 11, 1987, and was scheduled to open to traffic a few weeks later. The first callboxes in San Diego County were installed on SR 52 near Convoy Street on June 20, 1988. On June 30, 1988, SR 52 from Convoy Street to Santo Road opened to traffic. The I-15 interchange was built with state funds from the CTC. In 2000, Hazard Construction Company added a single westbound lane on SR 52 from SR 163 to I-805, a distance of , at a cost of $1.7 million (about $ in dollars). In 2006, the Metropolitan Transit System, in cooperation with the San Diego Association of Governments (SANDAG), Caltrans, and the California Highway Patrol, began a pilot program to run transit buses along the shoulders of SR 52 between Kearny Villa Road and I-805. During rush hour, buses were able to use these shoulders to bypass slow traffic in the main lanes. The trial was considered successful as more than 99 percent of trips arrived on time, customer feedback was favorable and no safety concerns were encountered. On May 9, 2007, the San Diego Union-Tribune published a story which raised reader concerns about a dangerous dip in the freeway. The dip had developed in a section of the highway constructed on top of the Miramar Landfill, and had been caused by trash settling; it was repaired by the next day. Planning for eastern portion The planning process for the remainder of SR 52 began as early as 1970, when the initial plan was to route the freeway through the city of Santee along Mission Gorge Road and the San Diego River. Planning was delayed until 1984, along with the construction of the I-805 to Santo Road segment. The City of Santee opposed the original plans, hoping to route the freeway on Prospect Avenue or north of the San Diego River. By April 1985, a second route along Prospect Avenue, proposed by Caltrans, earned the support of the City Council; however, the required demolition of many small businesses led many of those affected to start a petition against this route. On the other hand, there were objections about the "river route" costing approximately $15 million more (about $ in dollars) and cutting through a future "Town Center development". The Lakeside Chamber of Commerce preferred the route along the San Diego River, citing the