The Futwah–Islampur Light Railway (FILR) was a narrow gauge light railway in the Indian state of Bihar that connected the town of Fatuha (historically spelt Futwah), located on the main Howrah–Delhi line near Patna, with Islampur in the Nalanda region. Operated for much of the twentieth century as a private light railway, it was eventually absorbed into the Indian Railways network and later converted to broad gauge as part of the country-wide gauge unification programme.
| Name | Futwah–Islampur Light Railway |
|---|---|
| Type | Light railway (originally narrow gauge) |
| Region | Bihar, India |
| Termini | Fatuha (Futwah) and Islampur |
| Junction with | Howrah–Delhi main line at Fatuha |
| Successor | Indian Railways (Eastern/East Central Railway) |
In the late nineteenth and early twentieth centuries, several light railways were promoted in British India to serve agricultural districts that lay away from the trunk routes of the major railway companies. These lines typically used narrow gauge track to keep construction and operating costs low, and were designed primarily to feed traffic, especially grain and passengers, into the wider main-line network. The Futwah–Islampur Light Railway belonged to this class of feeder line, linking the rural hinterland of south-central Bihar to the East Indian Railway's main line at Fatuha.
The railway ran broadly southward from Fatuha, on the south bank of the Ganga not far from Patna, through the plains of present-day Patna and Nalanda districts, terminating at Islampur. The line passed through small market towns and villages, providing an important transport link for an area that was otherwise dependent on road and bullock-cart traffic. Islampur lies in proximity to historically significant centres of the Nalanda region.
For most of its existence the line was worked as a self-contained narrow gauge light railway, with its own small fleet of locomotives and rolling stock and modest station infrastructure. Traffic consisted largely of passenger services for daily commuters and rural travellers, together with goods movements of agricultural produce destined for the main-line interchange at Fatuha.
After Indian independence and the progressive nationalisation and consolidation of private light railways, the Futwah–Islampur line came under the management of Indian Railways. As part of Project Unigauge, the policy of converting non–broad-gauge routes to a uniform 1,676 mm broad gauge, the section between Fatuha and Islampur was rebuilt to broad gauge. Following conversion, the route was reopened as the Fatuha–Islampur broad gauge branch line under the East Central Railway zone, with through connectivity to the Patna area and beyond.
The Futwah–Islampur Light Railway is notable as one of the small feeder railways that shaped rural mobility in Bihar during the colonial and early post-independence periods. Its later conversion and integration into the broad gauge network reflects the broader twentieth-century transition in Indian railways from a patchwork of company-operated narrow and metre gauge light lines towards a unified national system.