score:3
I know people who have parked for 3 days in the public parking under the freeway right across from the train/trolley station. It is free and the signs only forbid RV overnighters. It is not a secure lot.
I have parked there myself, but never overnight. I last used it in Feb 2020. Looking at Google maps to locate it properly is tricky due to the freeway in the picture, east side of Pacific Hey next to the Old Town Transit Drop Off.
It's approximately in the location of the blue pin I've dropped on this map (it's below the freeway).
I found some of the signs in the lot (see below). It seems some say 24 hour limit, and some just say 24 hour parking, so I guess it's your risk any longer than that. As I said above I know people who have parked for 3 days (2 overnights) without issue - I was with them when they parked there, and they told me everything was fine when they returned.
There are other lots around Old Town, some free and some that charge. The other free ones I believe are less than 24 hours, and are for visitors to the park.
Upvote:2
Depends on who owns the lot, and who administers it...and, as Midavalo and Moo observe, how much attention they're paying. The lot addressed by Midavalo seems to be administered by the City of San Diego.
The lot you cite at 4250 Taylor Street is owned by CalTrans. CalTrans' main District 11 parking page contains this text:
Lot Use
Park and Ride lots are for the ride share commuter (vanpool/carpool) parking and are not intended for residential, commercial, or long-term parking.
Daily commuter parking at Caltrans operated park and ride lots is free of charge; no permits are required.
Some Park and Ride lots are limited to Monday through Friday 5:30 am to 6:00 pm. There are signs posted at each of these lots.
24-hour parking is not recommended. Vehicles parked outside of designated spaces or left in excess of 72-hours may be ticketed and towed at the ownerβs expense (California Vehicle Code Section 22651(k)).
No loitering, camping, vending, or parking of vehicles 30-feet or longer is permitted at any Park and Ride lot (California Vehicle Code Section 22518).
The entrance to this lot is on Sunset Street. Here's the entry, showing the signs posted there: