AndiS thanks for the info.
I have given the increased prep distance a try and not having any luck with the coding.
Trying to code the signal type, speed and prep distance is not working.
If I make this change I would have to do every home or outer home signal and test.
I think the best approach is to explain the rule and get people to work with it.
I have set 15 mph as the clearing speed as the default.
The default distance I believe is 200m.
In a couple of places where the grade is very steep I will raise to 20 mph
Thanks Ausc.