Red means stop, doesn't it? A human factors trial of a UK train safety system driver-machine interface

The Train Protection and Warning System (TPWS) is a primary safety system in use on the UK railways. TPWS reduces the risk from trains passing signals at danger (SPAD), overspeeding at permanent speed restrictions (PSRs) and overspeeding on the approach to buffer stops. Since it was introduced in 2002 there...