The railway was divided into two main systems, broad (5 ft. 6 in.) and metre gauge. There was also a comparatively small mileage of 2 ft. 6 in. gauge line worked by the BB&CI on behalf of the Indian States. In 1947 the mileage of the respective portions was stated to be: broad gauge, 1,198 miles, with a further 69 miles worked for Indian States; metre gauge, 1,879 miles, with a further 106 miles worked for Indian States; narrow-gauge, 152 miles, worked for Indian States and various companies. Quadruple track mileage was 22 and double-track 250, the remainder of the system being single-track, whilst running powers were exercised over 147 miles (including the important section from Muttra Junction to Delhi, owned by the Great Indian Peninsular Railway).