Standard London Underground Track
Standard London Underground track as seen at
Surrey Quays (East London Line). The running rails are the standard LU bullhead rail
which, although replaced in most areas by flat bottomed rail on the rest of railways in
the UK, remains common around the Underground. The current rails can be seen as the
two larger rails in the set of four. The negative rail is in the centre and the
positive is outside the running rails.
Another close-up picture of bullhead rail is