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Parking violations: camera installation requirements

1. The detection of vehicle stopping and parking rules violations requires the installation of video cameras with an enabled license plate recognition (LPR) function. These cameras may also be used to capture and recognize rear license plates of vehicles.

1.1. Video cameras must be positioned to monitor the area along the roadway where violating vehicles are most likely to stop, from one or multiple sides. Examples of images obtained from such cameras are shown in Figure 1.

Figure 1.

LPR camera view of a multi-lane road with a sedan and other vehicles stopped along the roadwayLPR camera view of an SUV and a sedan stopped on a two-lane road next to a hatched no-stopping road marking
LPR camera view of a car parked at the curb of a residential street lined with shops and other parked vehiclesMonochrome LPR camera view of a multi-lane road with a pickup truck and other vehicles stopped near the curb
Monochrome nighttime LPR camera view of a sedan facing the camera while stopped on the roadwayLPR camera front-facing view of an SUV parked among other vehicles along a street

1.2. To build an evidentiary base and improve detection of secondary vehicle characteristics, including at night, overview video cameras (OV) must be used. Examples are shown in Figure 2.

Figure 2.

Overview (OV) camera wide shot of a multi-lane roadway with traffic and a timestamp overlay, used to capture the broader scene for evidenceOverview (OV) camera wide shot of a roundabout with a bus and other traffic, labeled Camera 01
Overview (OV) camera wide shot of a bus stop and pedestrians beside a multi-lane road with apartment buildings in the backgroundOverview (OV) camera wide shot of a city street with vehicles and pedestrians on the sidewalk, with a timestamp overlay

An example of camera placement is shown in Figure 3.

Figure 3.

Map view showing a camera icon at a street corner with a shaded triangular field-of-view zone extending along the roadway to illustrate placement

2. To detect traffic violation events, camera installation must comply with the requirements specified in Table 1.

Table 1

Mounting requirements for OV cameras
CharacteristicRequirement
Tilt from +15° to +75°
Panfrom –75° to +75°
Roll (OV)from –5° to +5°
Image quality (OV)50 pixels/meter or higher
Illumination (OV)10 lx or higher
Mounting height (OV)from 5 to 15 meters above the road surface
Mounting requirements for LPR cameras
Tilt from 10° to +30°
Panfrom –20° to +20°
Rollfrom –5° to +5°
Image quality (LPR)300 pixels/meter or higher
Illumination (LPR)50 lx or higher
Mounting height (LPR)from 4 meters and above