Apologises if this has been asked already so I'm playing route boston sprinter and the safety systems slow me so much I end up running real late even if the track in front is total clear but yet still get slowed down to 30mph is this a bug or is it like that thanks.
I played that route ages ago and remember a similar issue. I never found a solution for that. I think in some thread concerning this, the consensus was that the system is bugged beyond believe.
This greatly depends on what is actually going on ahead of you. The most likely culprit is the timetable's misuse of the "dispatch beyond instruction" feature.