The Train in Spain

High Speed (de)Rail hasn't worked all the bugs out yet;

The most modern train safety systems use equipment on the track and within the driver's cab to replace traditional signals and control the speed and movement of the train automatically.

With a system such as the European Train Control System (ETCS), a driver would not be able to break the speed limit.

While parts of Spain's rail network - including a large section of the route the train had travelled from Madrid - do have the ETCS in operation, the curve where Wednesday's derailment took place relies on a less sophisticated safety system known as ASFA.