Don Mills to VP is an awful short distance to fire up a TBM. Consider the DVP crossing: http://maps.google.com/?ll=43.775827,-79.338348&spn=0.005756,0.010761&t=h&z=17
An option would be to build a 3rd road bridge N of the current 2 and shift Sheppard W to that Bridge. Shepperd E would move to the middle bridge and the south bridge would be for an at-grade LRT. Going east the LRT would be:
- South side platform at subway station
- Underground, cut&cover to portal W of DVP on the south side of road
- Over DVP on south bridge
- Stay on south side of the road till W of VP
- Enter cut&cover portal emerging in-median E of VP
Thoughts?
If the TBMs from Spadina are transferred there, it should make it more cost-effective. I agree that buying TBMs for that little stretch makes no sense though.