The Tren Urbano (English - Urban Train) is a 10.7-mile (17.2 km) fully automated rapid transit system that serves the municipalities of San Juan, Guaynabo and Bayamón in Puerto Rico. The Tren Urbano consists of 16 stations operating on 10.7 miles (17.2 km) of track along a single line. Tren Urbano is the first rapid transit system in the Caribbean. ~Wikipedia Ridership is just under 40,000 daily. - Thank you for your support. Comment below so all of us can have a productive and insightful conversation about transportation!