In response to my last diary entry, I have successfully found a path for the Line 4 branch. To be called Line 12, it will run along line 4’s tracks from downtown Quentinsburgh out to the Eastbrown turn, then it continues straight into Northcross following the BRT route, and eventually merging with line 3 tracks in Northcross itself.

However, it may end up with a unique type of service. Line 12 is being considered as the first ever line that runs fully express from downtown to the branch off from line 4, then running local to the end.

Why? Well, Line 4 is one of the few lines with express service from downtown Quentinsburgh. However, on the section closest to downtown line 4 runs with line 2, both very busy lines running local. If line 12 was added running local, the local tracks would likely be overcrowded in downtown. By allowing line 12 to be express only within most of the urban area, line 4 gets more express service and line 12 doesn’t overcrowd.

This is the biggest change in the QUARTA system since the line 1-line 7 switch.