In the end we come to the conclusion: Backbone Hubs have to be as fast as ever possible! As shown in our tutorial picture, there are no tight curves or major slopes. Therefore, we try to avoid slowing down these trains on mainlines (remember: money has something to do with time and time is money!).
Mainlines are intended to be fast and hosting trains in order to go over long distances. Mainlines enjoy the highest priority in the whole network.Again, we have a T-Hub but this time it is slightly different: we do not connect a sideline (LR) to a mainline (LL_RR) but a mainline to a mainline.But let us leave this drawbacks beside and move the focus back on the BBH itself. Also, we do not use bridges or something else. Be careful: this mainline has a temporary solution: we usually don't build tunnels on mainlines (since we can't signal tunnels!). A mainline is built from east to west (if you read the previous pages carefully you should already know where east and west are).
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