The Orange Line is one of three primary and five overall lines in the San Diego Trolley system, the others include the regular service Blue and Green lines and supplementary Silver and Special Event lines.
The Orange Line is one of three primary and five overall light rail lines operated by the San Diego Trolley, an operating division of the San Diego Metropolitan Transit System. Other Trolley lines in the system include the regular service Blue and Green lines and supplementary Silver and Special Event lines.