Report Illegal Parking
Allow members of the public to report instances of illegal parking; on pavements, on cycle lanes. Mobile Apps could pinpoint the location on maps and multiple photos or videos could be uploaded to support it. This could then be redirected to the relevant authority responsible for the map location.
Not sure on the legality of members of the public shopping motorists; would it be permissible in court..?
US site in beta is nearest I've seen trying: http://www.parkingmobility.com