On 18/10/2012 00:27, Steve Fitzgerald wrote:
In message , Richard J.
writes
The Paris Metro has holding lights (3 white lights in a triangle) on
or near the headwall at many stations, used routinely to regulate the
service. In my experience LU have never tried to impose punctuality
controls in that way (except possibly on the ATO lines?).

Oh they do!

A red light until 30 secs before departure time seems to do the business.


IIRC, there is a countdown clock at Paris Metro termini and a horn
sounds when it is time to depart.

A bell rings at termini on the New York City Subway.