How cold is too cold for trains?

It's never really too cold to operate trains, though it can be much more difficult when it's cold, and therefore more time-consuming. When it's not possible to operate trains, it's usually not the cold, but something associated with the cold, such as ice or snow.



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Even when ice glazes the landscape or temperatures dip dangerously low, railroads run 24/7. Maintaining operations in the face of Old Man Winter isn't easy, but with careful planning, experienced and dedicated crews, and specialized equipment and technology, railroads keep serving customers winter after frosty winter.

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This means the trains must operate at much slower speeds to safely travel. Snow, freshly fallen or in days-old drifts, produces its own set of problems. It can get sucked into the engine, where it then melts and shorts out major components.

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The main reason is because buses and trains are enclosed spaces, so the HVAC (heating, ventilation and air conditioning) system has to be kept on to ensure proper air circulation for everyone on board.

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Like mentioned above, the rails aren't really affected by ice or snow. They are just chunks of metal. The biggest issue that rails face is the cold. Rails are restrained by rail anchors from expanding and contracting due to temperature changes.

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In the US, standard stress free temperatures vary from 35 to 43 °C (90 to 110 °F). Despite stressing the CWR before installation, a rail may still reach its Critical Rail Temperature (CRT). This is the temperature of the rail above which buckling may occur.

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According to EPA data, freight railroads account for just 0.5% of total U.S. GHG emissions and just 1.7% of transportation-related GHG emissions. Moving freight by rail instead of truck lowers GHG emissions by up to 75%, on average.

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One instance is where the railway track is at a slightly higher level than the road approaches on either side. A long vehicle such a s a low loader can become grounded on the “hump”. Another situation is where, at a level crossing, a driver mistakenly leaves the road and turns onto the tracks.

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In trains, radiator systems are used to regulate the temperature of the engine, allowing it to operate at a consistent temperature without overheating - no matter the outside climate.

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Light rain won't cancel your trip, but it could lead to delays. When it rains, the tracks become slippery and the train must slow down in order to accommodate for the extra time the train will need to brake.

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