 The Victorian loading gauge for vehicles is sized between that of British and American practices. Wagons may be up to 22.85 metres (75.0 feet) long, 2.97 metres (9 feet 9 inches) wide, and carry loads up to 4.27 metres above the rail height. Double stacking of container wagons is not possible under these limits, with 2,655 mm (8 ft 8.5 in) high containers the largest permitted, with the exception of 3,200 mm (10 ft 6 in) high containers on some routes. Trials were made with the 4D double deck passenger train on some suburban lines, requiring alterations to overhead bridges and structures, but no double deck trains are used today.
