– San Juan – http://www.tramz.com/pr/sj.html The Tramways of San Juan, Puerto Rico by Allen Morrison, (Copyright © 2008-2108 Allen Morrison). This was put online on 1 November 2008. Esto es una página sobre los tranvías de San Juan, Caguas y Cataño.
– Mayagüez – http://www.tramz.com/pr/my.html – The Tramways of Mayagüez
– Ponce – http://www.tramz.com/pr/pc.html – The Tramways of Ponce