Find out more, including how we prevent rails buckling at http://www.networkrail.co.u... On warm days, rails in direct sunshine can be as much as 20 degrees centigrade above air temperature. As rails are made out of steel, they expand as they heat up and are subject to strong compression. This expansion has to be managed to reduce the risk of track buckling.
Keeping people safe on the railway is at the heart of everything we do. http://www.networkrail.co.uk/safety We’re creating a culture and system which will be sustainable for years to come and help us deliver not only a safer but a better performing and more efficient railway.