Press Release - October 2014

Speed Enforcement using Time of Travel

Transport Data Systems now offers a speed enforcement system using time travel measurements. A license plate reader identifies the vehicle as it passes two different points on a highway with the known distance between the points. The time of passage at each point is captured as well. This provides the agency with the ability to calculate the average velocity that the vehicle travelled between the two capture points. The first camera system would use either an intetnet connection of a 4G connection to transmit the image and the capture time to the second camera. The second camera searches the traffic for a matching license plate. Having found a match, the camera calculates the average speed of the vehicle using the distance between the capture points divided by the transit time. If this speed exceeds the preset limit for this roadway, the information is passed to the enforcement agency. The enforcement agency can then issue a citation to the owner of the vehicle. The second camera system includes a web site. A police car downstream from the second camera can log into this website and view violations on a real time basis for immediate enforcement.

In a larger implementation, a single central server can accommodate a large number of cameras. The TDS Average Speed Enforcement System design is shown below. The system uses a 2 megapixel monochrome version of the TDS Sighting Pro camera system along with a powerful IR illuminator for good 24 hour performance without the distraction of a visible flash. If the need exists, TDS can implement that velocity calculation into their cloud based services.

Transport Data Systems designs, develops, produces, and sells automatic vehicle classification and license plate capture products for the fare collection, commercial vehicle operations, parking lot access, school bus enforcement, and border crossing markets.