Snow removal on railway transport: strategy for protecting steel corridors

Ensuring uninterrupted train traffic during the winter period is a complex logistical and engineering task. Unlike road infrastructure, railway infrastructure is vulnerable not only to snow on the track but also to icing of the contact network, snowdrifts in cuttings, the formation of snow dunes on stretches, and avalanche danger. Snow removal here is carried out proactively, combining powerful specialized equipment, constant monitoring, and clear action protocols.

Major threats and strategies for combating them

Snowdrifts and the formation of snow drifts.

Threat: Snow blown by the wind can completely fill the track, threatening derailment of rolling stock, damage to running gear, and blockage of traffic.

Equipment and methods:

Snowplows: There are ram (light, for fresh snow), rotary (heavy, for compacted drifts), and chain-rotary (most powerful). Rotary snowplows (such as Soviet SM-2 or modern PSS-1M) are the "kings" of clearing. Their augers grind the snow, and the rotor throws it 20-50 meters from the track.

Plow snowplows: Installed on locomotives or special wagons for clearing tracks of fresh snow of small height.

Interesting fact: In the conditions of the Far North (Yakutia, the Kola Peninsula), permanent snow protection shields and galleries are built at the design stage to protect tracks from snow drifts — a kind of "tunnels" through which the railway passes.

Icing of switch points and contact networks.

Threat: Ice blocks the mechanism of switch points, disrupting routing. Icing of the contact wire leads to loss of contact with the pantograph, arcing, and breaks.

Equipment and methods:

Switch heaters: Gas (propane-butan) or electrical systems built directly into the switch structure. They are activated automatically by signals from temperature and humidity sensors.

Train defectoscopes and snowplows with special equipment: Modern diagnostic complexes (in Russia — PDK/PDM) combine the functions of track cleaning and blowing switches with compressed hot air. For the contact network, special defectoscope wagons and express electric locomotives equipped with anti-icing systems (such as impulse heating of the wire) are used.

Manual treatment: In critical situations, track workers manually clean switches and apply liquid or gel anti-icing compositions that do not cause corrosion.

Snow avalanches in mountainous areas.

Threat: Complete destruction of the track, crashes (tragedy on the Saint-Gotthard Pass in Switzerland in 2010).

Methods: Construction of avalanche protection galleries (as on the Trans-Siberian Railway in the Baikal area or on Alpine roads), proactive avalanche release using artillery fire or explosives (practiced in Switzerland, Austria, Russia in the North Caucasus), and installation of snow-retaining barriers on slopes.

Organization of work: the principle of constant readiness

Snow removal on railways is a round-the-clock process during the winter period, not a reaction to a specific snowfall. The dispatching service plays a key role, based on data from meteorological stations installed along the tracks and patrol trolleys, deciding on the dispatch of snow removal equipment.

System of echeloning: The most responsible sections (mountain passes, approaches to large junctions) are protected first. Snowplows can work in a "caravan": first, ram or plow, then rotary for eliminating residual drifts.

"Winter schedules": Special schedules are introduced on many sections with severe climates, providing for increased intervals between trains for cleaning "windows" or reducing speeds.

Examples of advanced practices worldwide

Japan (Hokkaido Island): To protect against abundant snowfall on the Hokkaido Shinkansen line, a comprehensive set of measures is used: fully enclosed galleries on mountain sections, heating of tracks and switches, as well as powerful rotary snowplows capable of working at high speeds. The wagons of the trains have a special aerodynamic shape, minimizing snow drifts on the track.

Switzerland (Alps): Mountain roads (such as Berninabahn or Jurabahn) are protected by tens of kilometers of avalanche protection galleries and canopies. Automated meteorological systems are used, giving orders to close sections in avalanche danger. For cleaning stations and tracks, compact rail snowplows are used.

Russia (Trans-Siberian Railway, BAM): Here is concentrated one of the most powerful in the world parks of snow removal equipment, including legendary steam-powered snowplows in the past and modern PSS-1M. Work is organized on a section basis: each section of the track is assigned its own equipment and teams, which allows for rapid response to drifts in conditions of extremely low temperatures (up to -50°C) and "snow fluff" — especially loose and bulky snow.

Economic and technological challenge

The maintenance of winter readiness of railways is incredibly costly. A modern rotary snowplow can cost several million dollars. The energy costs for heating switches and stations are enormous. Therefore, today the emphasis is on forecasting and preventive measures:

Use of thermal imagers and sensors for monitoring the condition of tracks.

Development of new hydrophobic coatings for contact wires.

Application of geographic information systems (GIS) for modeling avalanche and drift hazards.

Conclusion

Snow removal on railway transport is not just clearing the track, but a comprehensive system for ensuring safety and regularity of movement in extreme conditions. It has evolved from manual labor and steam snowplows to a high-tech industry where powerful mechanics are combined with precise automation and preventive engineering. Success here depends on the triad: specialized equipment, pre-infrastructure protection, and impeccable logistics of winter work. This titanic, often "behind the scenes" work, allows steel corridors to remain the most reliable mode of transport in any, even the most severe winter.

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