A combination of technologies adapted to the specific site conditions was used. The pavement at the entrance to the main square is made of granite paving stones, so the use of intrusion sensors is not feasible; as a result, video analysis was chosen to detect vehicles and distinguish them from pedestrians. In the case of the bus stops (20×20 m area), illegal entry can occur over a wide area and offenders can park in any position, meaning the best option was to shoot video footage from the moment the intrusion is detected in the monitored area.
In the former access control case, a rear photo of the vehicle is taken and stored, providing vehicle identification and graphic evidence of the traffic offence. In the latter case, a 45-second clip is shot and the first image available to the validating authority (police) is the last video shot for a direct view of whether there is a vehicle parked illegally or not. If the video is framed so that the licence plate is visible, then both evidence and vehicle identification are collected. If the vehicle is parked sidelong (i.e. licence plate not visible), the video footage is reviewed until a still shot providing a view of the licence plate is obtained..
User-friendly systems so robust that they have been in fault-free operation since 2008.