private siding

A private siding is a length of railway track, typically 200 to 500 metres, owned and maintained by an industrial company rather than by the railway operator. It branches from a public railway line at a junction point and extends into the company's facility, allowing trains to be loaded or unloaded without occupying the mainline or the railway's own sidings. The railway operator retains control of the junction and the approach route but has no ownership stake in the track beyond that point.

Private sidings emerged during the industrial expansion of the 19th and early 20th centuries when large manufacturers, collieries, steelworks, and chemical plants needed dedicated rail access. A factory might invest in a siding to eliminate the cost and delay of waiting for public siding space, or to handle frequent movements without disrupting commercial traffic. The owning company was responsible for track alignment, drainage, ballast condition, and junction safety. Some large shippers employed their own locomotives and shunting crews; others contracted the railway operator to perform this work under agreement.

The physical arrangement varies significantly. A simple siding might be a single stub track with a passing loop; larger installations branch into multiple spurs serving different loading bays, warehouses, or production lines. Rail weight, sleeper spacing, and ballast depth must meet railway standards for the permitted axle loads, even though the infrastructure owner is private. The siding must include proper drainage and be fenced to prevent unauthorised access.

Decline and legal status have reshaped the private siding landscape. From the 1960s onward, road transport competed heavily with rail, and many factories closed or relocated. Thousands of private sidings fell into disrepair or were lifted entirely. Ownership disputes sometimes arose when a company ceased operation but did not formally surrender the siding: the railway operator was left responsible for a potentially hazardous abandoned line. Modern regulatory frameworks now often require formal decommissioning and reinstatement of land. Railway heritage sites and active freight terminals still use private sidings; they remain common at ports, cement works, waste recycling centres, and intermodal depots.

The term private siding distinguishes the track from a private railway, which is independently operated and not connected to a public network. A private siding is also distinct from a spur, which may be a shorter or temporary branch, and from a branch line, which is public infrastructure built and operated by the railway company itself. In modern practice, access rights and maintenance obligations are governed by detailed trackage agreements between the railway and the siding owner.