A statement from the Mayor's office says that there's an official department of transportation-developed app en route and that there's "no budget impact" from the proposal seeing as funds were already earmarked via an existing tech upgrade for the department. The whole thing is an extension of a pilot program in the Bronx's Belmont neighborhood. In case you're curious how police will be able to identify between cars using the app and folks trying to skirt the system, well, they'll have purpose built tablet apps of their own.