Spain has improved speed signs across its rail network following the derailment of a fast-moving train last month that killed 79 people, state rail infrastructure company Adif said yesterday.

The company said it has identified 80 "transition points" on its network where trains are required to significantly reduce their speed and has installed signs on these locations to remind drivers that they must slow down.

"These signs will boost safety but the system is already safe," the company said in a statement. The train tore off the tracks on a sharp bend on the outskirts of the northwestern city of Santiago de Compostela on 24 July in Spain’s deadliest rail disaster since 1944.