Route
The service runs along the Great Western Main Line from Paddington to Airport Junction (Network Rail owned infrastructure). The line from Airport Junction to the airport terminals is owned by Heathrow Airport Holdings Limited but maintained on their behalf by Network Rail. The line is electrified at 25 kV AC overhead and uses Automatic Train Protection (ATP). The controlling signalbox for the entire route is Slough (New) IECC.
Read more about this topic: Heathrow Express
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