Specifications include, but are not limited to: The video detection system shall provide flexible detection zone placement anywhere within the combined field of view of the image sensors. Preferred presence detector configurations shall be lines or boxes placed in the lanes, or lines or boxes placed in-line with lanes of traffic. A single detector shall be able to replace one or more conventional detector loops. Detection zones shall be able to be fully overlapped. In addition, detection zones should have the capability of implementing “AND” and “OR” logical functions including presence, extension and delay timing. These logical functions may be excluded if provisions are made to bring each detector separately into the controller and the controller can provide these functions. 3.2.1 Placement of detection zones shall be by means of a graphical interface using the video image of the roadway. The monitor shall show images of the detection zones superimposed on the video image of traffic while the VIVDS processor is running. 3.2.2 The detection zones shall be created by using the mouse or keypad to draw detection zones on the monitor. The detection zones shall be capable of being sized, shaped and overlapped to provide optimal road coverage and detection. It shall be possible to save, upload and download the detector configurations to and from the VIVDS processor unit and to retrieve the detector configuration that is currently running in the VIVDS processor unit. 3.2.3 The mouse or keypad must be used to edit previously defined detector configurations so as to fine-tune the detection zone placement size and shape. Once a detection configuration has been created, the system shall provide a graphic display of the new configuration on its monitor. While this fine-tuning is being done, the detection shall continue to operate from the detector configuration that is currently called. 3.2.4 When a vehicle occupies a detection zone, the detection zone on the live video must indicate the presence of a vehicle, thereby verifying proper operation of the detection system. With the absence of video, the card must have an LED indicator that will indicate proper operation of the detection zones. Shelf mounted units may provide an LED or LCD display indication to satisfy this requirement. 3.2.5 Detection zones shall be specific to the direction of vehicle travel. The specific direction to be detected by each detection zone shall be user programmable. The vehicle detection zone shall not activate if a vehicle traveling any direction other than the one specified for detection occupies the detection zone. Cross-street and wrong way traffic shall not cause detection. Programming delay timings (controller or processors) will not be allowed to correct for cross-street or wrong way detection...
