I've been driving the Coals to Newcastle route quite a lot, which is excellent but frustrating in equal measure due to the numerous and constant speed restrictions even on the double track main line section, often with not even enough distance to reach the higher speed before the next reduction. That's an aside but what I have noticed is that quite often the F4 Track Monitor one moment will be showing no restrictions for the next 3 miles then suddenly without warning a cluster of reduced speeds pops up, often less than half a mile away resulting in a rather hasty brake application and nail biting few moments.

As the route doesn't have any advanced warning signage for speed limits and Driver Vern hasn't actually signed the road for route knowledge, I'm 100% dependent on the Track Monitor otherwise I would switch it off. Is this a known issue or maybe something route specific, perhaps how the speed restrictions have been added by the builder?