This makes me incurably angry as longtime resident of South Philly. You sound like your head is in the clouds to a local. Why? Because our city operates roughly above the 3rd world level.
Nobody puts signs up
Nobody gives notice
Nobody gives a good God dammed.
Park where you can, hope your car is there tomorrow, hope there isn't a gas leak, road collapse or towed randomly
Its so absurd we had a TV show called Parking Wars.
I was courtesy towed last week. I spend a year backing down a narrow (one car width) alley because we had a pothole the size of Alaska. I pushed an abandoned car onto broad street during rush hour to get it towed after 6 months. I had my car towed because of a local celebrity funeral. All my tires were slashed during the BLM riots. My friends car was flipped at the Phillies parade, anothwrs at the eagles rally. I've gotten hit with a baseball bat for asking someone to move their car.
Welcome to hell
Edit: did I mention our parking "authority" is extremely predatory, run as a nepotism program for local Republicans, siphons money from the city and has been routinely found to be absolutely kafkaesque. So bad they actually had their own petty court removed for being a essentially kangaroo court?