Let's assume that the app exists and has a good database. Parking rules and regs change on a regular basis in the context of a city, typically both tickets and drivers utilise the same signage to determine if an offense has occurred. So for all intents and purposes the signs are the decider of if a ticket is issued.
So when a driver arrives, they load the app, they'll still have to check the signs to make sure the rules haven't changed. And in the time it took to load the app and have it figure out your location (and you'll likely have to enter side of the street due to GPS limitations) you may have well just read the signs.
And when the app is wrong (as it rarely will be) then the driver has no excuse. Saying "an app told me I could part!!!" will be laughed at, and the app creator will likely need legal protection as they will get sued even if the app is free. Lawsuits that you win are still expensive.
The DOT website in NYC already has a street parking function which displays the rules in effect for any specified street / intersection. I don't know if this is legally admissible, though - I believe the rules can only be enforced if the signage is in place.
Let's assume that the app exists and has a good database. Parking rules and regs change on a regular basis in the context of a city, typically both tickets and drivers utilise the same signage to determine if an offense has occurred. So for all intents and purposes the signs are the decider of if a ticket is issued.
So when a driver arrives, they load the app, they'll still have to check the signs to make sure the rules haven't changed. And in the time it took to load the app and have it figure out your location (and you'll likely have to enter side of the street due to GPS limitations) you may have well just read the signs.
And when the app is wrong (as it rarely will be) then the driver has no excuse. Saying "an app told me I could part!!!" will be laughed at, and the app creator will likely need legal protection as they will get sued even if the app is free. Lawsuits that you win are still expensive.