Now there’s literally no way for a car to even be on the rails at all. Not only does this prevent driving into the tunnel, it would speed up the N-Judah for 45,000 riders everyday.

(We even gain some precious Duboce Park space!)

SFMTA could literally build a quick and dirty, temporary version of this today by simply extending the same type of existing hit posts west from Duboce & Fillmore all the way to the Sunset Tunnel East Portal.