Changes

*'''[[Salsette Trombay Railway]]''' The records show that eight SG locomotives dating from 1921-22 were supplied for the '[[Salsette Trombay Railway]]' which did not commence operations until 1928.

<blockquote>''It is interesting to speculate how, in the 1920's when BG was becoming the norm, both the 'Bombay City Improvement Trust' and the '[[Salsette Trombay Railway]]' came to use the Standard Gauge (SG)''</blockquote>

*'''[[Nalhati-Azimganj Railway]]''', the original name for the [[Indian Branch Railway]]; constructed in 1863 used a 4ft(1222cm) gauge, later converted to BG.

*'''[[Sone Canal Construction Railway/Tramway]]''' used a 4ft(1222cm) gauge during the construction 1868-74

Following the introduction of the metre gauge, the Government of India([[Government of India |GoI]]) occasionally allowed existing broad gauge lines to be converted to metre gauge and ''vice versa'' where expedient.

Despite four Commissions of Inquiry, the GoI did little te resolve the continuing problem of transhipment wherever there was a break-of-gauge.