Off the bat, the AFB has modern, freeway-standard, 12-foot lane widths. During low-traffic periods, some traffic comfortably traverses same at 110-120 km/hr.
Had the AFB been constructed to exact freeway specifications, one would also see 10-foot shoulders on each side of a carriageway permitting stalled vehicles, vehicles in accidents, etc. to pull over to the shoulder allowing most traffic unimpeded flow.
Unfortunately, that would have escalated the costs of the structure and therein comes the trade-off - basically non-existent shoulders. As an aside, during the Monday afternoon commute accidents in both directions resulted in just one-lane in each direction with up to 1 1/2 hour delays in each direction.
In any event, Stone's comment comes across as an off-the-cuff, ill-considered, ill thought out trial balloon. Just does not make any logical sense. For example, the sidewalks are on the OTHER side of the cable stringers. No room to expand there. Period.
In order to go to 7-lanes, one would need to decrease each of the 6 lanes to 11-feet (- 6 ft). Then add in the 1-foot right hand shoulders on each side plus the 3-foot median area (5 feet altogether) and bingo - another purported 7th lane at 11-feet - with no median whatsoever. Again, Stone threw out a ridiculous red herring here IMHO.
Just ain't gonna happen IMHO.
Again, the counter-flow proposal also comes across as a bit of a hair-brained scheme from my perspective as well.