Place: Mission San Diego trolley station in San Diego, California. Date: June 23, 2008 The San Diego Trolley is known for its reliability, safety, and convenience. Often called San Diego's "moving landmark", the Trolley is also a fun way to get around, whether commuting to work, traveling to the International Border, or heading to Centre City's shopping, restaurants, harbor and historic attractions. The San Diego Trolley now serves historic Old Town, California's birthplace, as well as Mission Valley, Fashion Valley, and Qualcomm Stadium at Jack Murphy Field. The Blue Line is one of three light rail lines operated by the San Diego Trolley, an operating division of the San Diego Metropolitan Transit System. It currently operates between San Ysidro and Old Town in San Diego. Other Trolley lines include the Orange and Green lines. History The Green Line is the newest Trolley line opened in July 2005. Service currently operates between Old Town in San Diego and the city of Santee. This includes the Mission Valley East extension, as well as previously operating segments of the Blue Line west of Mission San Diego and Orange Line east of Grossmont Transit Center. The San Diego State University (SDSU) stop is the system's only underground station.