It used to have four foot wide lanes.
Then it got six foot lanes, but now it’s lots busier these days, with all manner of transport upon it:
And the SFPD and Rec & Park drive upon this path with Crown Victorias all the time too, right?
So what’s wrong with eight foot lanes, I ask you.
(Oh, no other “improvements” are required, no beautification efforts are required, or desired. Just work on the basics, SFGov.)