In Victoria, (at least) I have yet to see a speed proving installation that
shortened headways. The way you shorten headways is to change the track circuit
overlap/signal spacing.
Of course the most ridiculous speed proving installation was on the Western
line CTC where you had to "prove" your speed when going into a loop, all
sounded nice on paper except the trains had no trip apparatus!
One of speed proving's many problems is that it has to be set for the train
with the worst braking rate,in the worst conditions, (rain etc) this means that
trains with better braking rates can and do get tripped when operating
normally.
David, if you were a driver you would know how stupid speed proving is, it does
not increase safety and it only raises the irritation factor for drivers.
Mark.
THE ROCK is dead
Long live THE ROCK!