World of Subways, is a series of subway simulations created by TML-Studios. There are currently 4 volumes. All volumes are standalone programs and can not be modified. Unlike most train simulations, the routes are short and modeled at near reality detail levels, each volume has only one route included with no other routes available with the exception of Volume 1. However the total amount of drivable track in Volume 1 is significantly less than other volumes with only 13.8 miles included.