 Guadalajara's light rail system, despite being only about 15.5-miles long, transported an average of approximately 268,500 passengers per day in the Fourth Quarter (Q4) of 2013, translating into over 18,000 daily boardings per mile, which is the highest per mile boarding rate of any North American light rail system.The Xochimilco Light Rail line is close behind, seeing almost 11,400 boardings per mile in Q4 2013, the second-highest rate of boardings per mile of any North American system.The United States has a number of light rail systems in its mid-sized to large cities.