7.3 is the interlocking at Nickle, and 9.3 is Weston Road. There is already a 4th track laid (but dormant) from Weston Road to Humberview, the next interlocking, just southeast of the 401. The new trackage will close the gap to create a 4th track between the two interlockings, This would enable more frequent 2-way operation on the track normally used by GO as a peak-direction track and as a 2-way off peak track.
11.5 is just west of Etobicoke North, and 13.5 is just west of Wice. Again, that gives 2-direction movement without interfering with UPE west of Etobicoke North.
The only down side in this otherwise good news is that neither Weston nor Etobicoke North will have platforms for the new track....so there is still some potential limitation on 2WAD service. But overall it enables considerable improvement and operational flexibility.
- Paul