 Of the light rail systems in the United States, Los Angeles has the fourth-highest annual ridership in North America, followed by Boston with the fifth-highest.In general, ridership on light rail systems in Mexico and Canada tends to be higher than the corresponding ridership on light rail systems in the United States, especially on a boardings per mile basis where the Mexican systems (Guadalajara light rail system and Xochimilco Light Rail) rank first and second, and three Canadian systems (Calgary's CTrain, Edmonton Light Rail Transit and Toronto's streetcars) rank third, fifth and seventh.On a boardings per mile basis, the most ridden light rail systems in the United States are again Boston's MBTA ranked fourth, followed by San Francisco's Muni Metro ranked sixth.