Faulty
131Double switching — A single switched relay can close inadvertently in response to a single false feed current. A double switched relay cannot close inadvertently with the application of the same current. At least two separate faults would be required to allow this… …
132Southall rail crash — infobox UK rail accident title= Southall rail crash date= 19 September 1997 location= Southall line = Great Western Main Line cause= Signal passed at danger trains= 2 pax= deaths= 6 injuries= 150The Southall rail crash was an accident on the… …
