Today there are none, with the last track sections abandoned and ripped up in 1989.
Chinese railroad workers built a small community and facilities to support the track section.
It consists of a single track section, about 42 kilometers long.
The route is thus no longer cleared in fixed track sections.
A further track section just down line from Slough was cut back.
Once the lines have all joined, the line continues as a 6 track section, crossing the A9.
The line continues as a 2 track section again.
The line is two track throughout, except for a short single track section on the approach to Reading.
As an economy measure, the double track section of the railway was singled in 1927.
Especially controversial was a single track section through the Breestraat.