Electrify
Senior Member
I agree. If stop spacing is an issue, the correct response is to adjust stop spacing, not to build an overly expensive tunnel. The same thing applies to any problems with transit priority at intersections.
This. However, the role of this thread was to assume that the only options are the two listed above since at this point in time they are the only two concrete plans: surface, lots of coverage, but with short stop spacing for slower speeds; or underground, limited coverage, and wider stop spacing for higher speeds.