The Tunis-Goulette-Marsa or TGM railway is a Tunisian suburban train line connecting central
Tunis
with the beachside suburbs of La Goulette ,
Carthage
, Sidi Bou Said and
La Marsa
. It was the first railway in
Tunisia
and starts in 1872 . Though sometimes crowded , this means of transportation is comfortable , cheap , and fast . To keep yourself away from the rush hours , avoid using the trains from 7 . 30am to 8 . 30am and 5pm to 6 . 30pm . Also make sure you get into the TGM not before 5am and not after midnight . You can reach La Goulette within 20 minutes; Carthage within 30 minutes; Sidi Bou Said within 35 minutes; and La Marsa Plage within 45 minutes .