The vehicles covered by this heading, whether or not self-propelled, are specially designed for use, e.g., in the installation, servicing and maintenance of the permanent way and structures alongside the track.
The heading includes :(1) Workshop vans and trucks fitted with tools, machine-tools, electric generators, lifting machinery (jacks, hoists, etc.), welding equipment, chains, cables, etc. (2) Breakdown and other crane-vehicles; locomotive or coach lifting crane-vehicles; crane-vehicles for lifting or placing rails; crane-vehicles for loading and unloading at station platforms. (3) Winch trucks. (4) Trucks fitted with special equipment for cleaning or tamping ballast. (5) Trucks fitted with machinery for mixing cement for use on the track (for the foundations of electric cable pylons, etc.). (6) Trucks for calibrating weigh-bridges. (7) Scaffold trucks for the installation and maintenance of electric cables. (8) Spraying vans for weed-killing. (9) Self-propelled vehicles for track maintenance (in particular, railway trackliners), equipped with one or more engines which not only power the working machines mounted thereon (track-setters, ballast tampers, etc.), and propel the vehicle while work is in progress but also enable it to travel rapidly along the track, as a self-propelled unit, when the working machines are not in operation. (10) Railway testing coaches fitted with special equipment such as automatic instruments for checking the working of the engine, brakes, etc. (for example, for measuring the load hauled, detecting defects in the rails, track base, bridges, etc.); track checking coaches which record, whilst travelling, any track irregularity. (11) Mechanically-propelled track inspection trolleys, including motorised rail-cycles, used by the railway staff for track maintenance. They are usually fitted with internal combustion engines, are self-propelled, and provide a rapid means of transport both for maintenance personnel and for materials to be carried or picked up along the track. (12) Non-mechanically-propelled track inspection trolleys, including rail-cycles, used by railway inspection staff (e.g., hand- or foot-propelled types). When mounted on simple wheeled platforms and not on true railway or tramway underframes (not constituting, therefore, true railway or tramway rolling-stock), machines, measuring instruments and other equipment, are excluded from this heading and fall in other more specific headings (headings 84.25, 84.26, 84.28, 84.29, 84.30, etc.).
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