Have there been any serious proposals or discussion in the last two decades? SFO’s current master plan estimates a growth of 50% more passengers and aircraft operations before maxing the current capacity.
Not since the original proposal ~20 years ago, Peskin has made comments since reiterating that he wouldn't let it happen. We may not be at capacity but SFO has a pretty terrible on time percentage, and traffic slows massively when there's bad weather.