24-09-2012, 01:06 PM
What an excellent forum this is! I have received three replies from three moderators, each clearly with a wealth of experience. Thanks so much to you all for your help.
Sorry to be a pain on the 1.5 times the braking issue. I may be slow here, but from my reading of the GK/RT0075 standard, I can't seem to see where it says it's OK to exceed the min braking distance by more than 50% for mixed traffic on the same line. However, as pointed out, I guess this is one of those problems that arises in the exam because the deceleration rates for passenger and freight are equal, and this is not necessarily reflective of reality (though makes for simpler exam calculations).
Point taken about train protection. I'll see how I go with it on the exam. Will definitely put a comment on at the very least, and hopefully more, time permitting.
Thanks again,
Robbie
Sorry to be a pain on the 1.5 times the braking issue. I may be slow here, but from my reading of the GK/RT0075 standard, I can't seem to see where it says it's OK to exceed the min braking distance by more than 50% for mixed traffic on the same line. However, as pointed out, I guess this is one of those problems that arises in the exam because the deceleration rates for passenger and freight are equal, and this is not necessarily reflective of reality (though makes for simpler exam calculations).
Point taken about train protection. I'll see how I go with it on the exam. Will definitely put a comment on at the very least, and hopefully more, time permitting.
Thanks again,
Robbie