next few years, 1.5 million cubic meters of rock were blasted through in 160 separate explosions to allow for the interchange with SR 54 to be built. In 2005, the road was given the South Bay Expressway name. The South Bay Expressway extended SR 125 southward from SR 54 to Otay Mesa. This toll road was one of four privately financed toll highway projects, including the 91 Express Toll Lanes, that were approved in 1990; it was also one of two toll roads financed and controlled by both public and private sources, although the 91 Express Lanes, the other road, soon became entirely publicly owned. A partnership known as the South Bay Expressway operated the road, while an Australian company, Maquarie Group Ltd., handled financial and construction matters. By 2006, the contractor had encountered delays due to material and worker shortages. The initial toll rates were announced in early 2007, with the lowest toll set at 75 cents. The toll road opened on November 19 of that year. The entire cost of the expressway portion was $843 million, paid for by South Bay Expressway to own the franchise on the tolled portion of SR 125. The interchange with SR 54 was constructed with $160 million of public funding. Bankruptcy In 2008, 30,000 vehicles a day traveled on the expressway, which fulfilled state expectations; however, complaints were made about the toll machines, due to their low height and needing the exact amount of the toll. In late 2009, the South Bay Expressway partnership that operated the road questioned the value of the toll road for property tax purposes, saying that it was worth $330 million less than it was originally valued due to the low volumes of traffic using the road. On March 22, 2010, the toll road's operator filed for Chapter 11 bankruptcy protection, citing traffic counts running at less than 40 percent of initial estimates due to the economic downturn. Some drivers chose not to use the toll road due to a recent increase in tolls. An editorial in the San Diego Union-Tribune also blamed the delay in opening the toll road and the associated penalties, interest, and legal fees for the company's financial status. According to the bankruptcy filing, the expressway had $510 million of loans outstanding, of which $170 million was owed to the U.S. Department of Transportation. In addition, there was over $600 million of unresolved