View Single Post
  #1  
Old 10th December 2019, 04:41
aussiesteve's Avatar
aussiesteve aussiesteve is offline
Senior Member
 
Join Date: Dec 2017
Location: Bathurst
Posts: 577
Predictor Level Crossing protection

A bit of a scare for both the train hogger and traffic.
https://www.gov.uk/government/news/n...level-crossing
I am NOT a fan of predictor style level crossing protection.
Such things were introduced here back in the late 1990s.
Motorists complained about the waiting time at protected level crossings for freight trains.
The advance trip circuit needing to be out far enough to encompass the higher speed of the Rocket (XPT).
But, then a slow slogging freighter would take much longer to reach the crossing.
Hence the predictors to alter the timing of the protection circuits due to actual train speed when tripping the advance circuit.
One such level crossing was on a steep hill climbing out of a dip.
Prior to the predictor, on freighters we would power up over the first hill and then let it run (up to max train and track speed) in the dip.
This would assist the train being able to climb over the next hill on which the level crossing was.
BUT, after the predictor went in, it became VERBOTEN to increase trains speed after tripping the advance circuit.
SO, we had to actually put the brakes ON to maintain the slow speed.
Then power up and struggle over the hill with the level crossing.
The Rocket by contrast able to hit 160 kph.
Steve.
Reply With Quote