Can railroad tracks get too hot?

Railroad engineering departments and train operators coordinate “slow orders,” reductions in speeds in order to avoid derailments when air temperatures exceed 100°. At an air temperature of 110°, the temperature of the rails themselves can often reach 140°.



People Also Ask

This stress can cause railway steel to fracture. In extreme heat, a length of CWR suffers compressive stress. This type of stress can cause sun kink where a length of a railway buckles laterally (sideways).

MORE DETAILS

Because rails are made from steel, they expand as they get hotter, and can start to curve this is known as 'buckling'. Most of the network can operate when track temperatures heat up to 46°C – roughly equivalent to air temperature of around 30°C – but rails have been recorded at temperatures as high as 51°C.

MORE DETAILS

Just as people can suffer sunburn or heat stroke from too much exposure to sunlight and hot temperatures, rail can bend or warp because of a blistering sun and sweltering temps. If the rail malformations known as a sun kink or track buckle aren't repaired in a timely manner, trains can derail.

MORE DETAILS

Because rails are made from steel, they expand as they get hotter, and can start to curve this is known as 'buckling'. Most of the network can operate when track temperatures heat up to 46°C – roughly equivalent to air temperature of around 30°C – but rails have been recorded at temperatures as high as 51°C.

MORE DETAILS

Railways. Steel rails expand and tend to buckle in the heat – whatever the climate. According to Network Rail, railways worldwide are designed to operate within a 45C (81F) range, according to the local conditions.

MORE DETAILS

Expansion and contraction: Railway tracks expand and contract due to temperature changes. Without gaps, the rails would have no room to expand, leading to buckling or bending of the track. This can cause derailments and damage to the infrastructure.

MORE DETAILS

Lifetime of railway track is normally between 40-60 years.

MORE DETAILS

Rails are made of steel which expands as it heats up. If trains go too fast they risk buckling the track. While the air temperature might be 31C, temperatures on tracks can exceed 50C during heatwaves. Just a few hours of above-average heat is enough to cause problems.

MORE DETAILS

The estimated accident rate in 2019 is 0.85 fatal collisions or derailments per billion train-kilometres, which represents a fall of 78% since 1990.

MORE DETAILS

But like any piece of machinery, rail tracks can wear down and become damaged over time.

MORE DETAILS

In the United Kingdom, CWR is stressed to 27 °C (81 °F), the mean summer rail temperature. In the US, standard stress free temperatures vary from 35 to 43 °C (90 to 110 °F).

MORE DETAILS

When air temperature reaches 30°C, rails in the sun can reach 50°C. In the UK a temporary speed restriction is imposed when rails reach this temperature because trains apply less pressure on the rails when they slow down. Some railway maintenance teams paint rails white to cool them down in summer.

MORE DETAILS

Protective coatings and paints are widely used to prevent rust formation on railway tracks. These coatings and paints create a barrier between the metal surface of the tracks and the environment, preventing moisture and oxygen from coming into contact with the metal.

MORE DETAILS