The 12.5-km line runs between Mendoza Central Station (es) and General Gutierrez in Maipú, on double-track1,435 mm (4 ft 81⁄2 in) standard gauge track. Construction began in March 2009. An inauguration ceremony was held in February 2012, but service did not begin at that time, as much construction work remained to be completed. Since 29 April 2012 passengers were permitted to ride on occasional demonstration/trial service on a portion of the line. The system finally opened for regular service on 8 October 2012.
The service is provided by eleven Siemens–Duewag U2 light-rail vehicles (LRVs) acquired secondhand from the San Diego Trolley system in San Diego, California. By November 2011, about half of these had arrived in Mendoza, and the delivery was completed with the final two cars arriving on 27 April 2012. It is planned to acquire an additional 28 Siemens U2 cars from San Diego, four of which are to be salvaged for parts.
The Metrotranvía of Mendoza serves the metropolitan area of Mendoza, which includes the departments of Las Heras, Central district, Godoy Cruz, Maipú and Luján de Cuyo. Service operates from 6:00 to 22:00. The line has been named the Línea Verde, or Green Line. The line operates on the right-hand side as its former US light rail rolling stock is configured, in contrast to the left-handed operation of the majority of the Argentine railway network.