Four O'Clock Factoid: A Boat You Can Get On

Four O'Clock Factoid is a daily feature on Track Twenty-Nine helping to get you through the workday with a bit of useless knowledge.

San Juan's Tren Urbano is the first rapid transit system in the Carribbean. Opening in December 2004, the line runs 10.7 miles to the south and west from old San Juan and has 16 stations. Trains come every 4 minutes, and Puerto Rico's Tren Urbano has an average daily ridership of 38,700.