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2. Speedometer - Wikipedia

   en.wikipedia.org/wiki/Speedometer

   At Conformity of Production Audits the upper limit on indicated speed is increased to 110 percent plus 6 km/h (3.7 mph) for cars, buses, trucks, and similar vehicles, and 110 percent plus 8 km/h (5.0 mph) for two- or three-wheeled vehicles that have a maximum speed above 50 km/h (31 mph) (or a cylinder capacity, if powered by a heat engine, of ...

3. TIRTL - Wikipedia

   en.wikipedia.org/wiki/TIRTL

   TIRTL receiver on a portable stand (the device is more commonly built into a curb) The Infra-Red Traffic Logger, more commonly known simply by the acronym TIRTL, is a multi-purpose traffic sensor that can be used as a traffic counter, speed sensor, red light camera sensor, heavy vehicle tracker, overheight vehicle sensor, rail crossing sensor and network management system. [1]

4. Inertial navigation system - Wikipedia

   en.wikipedia.org/wiki/Inertial_navigation_system

   An inertial navigation system (INS; also inertial guidance system, inertial instrument) is a navigation device that uses motion sensors (accelerometers), rotation sensors and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object without the ...

5. Automotive navigation system - Wikipedia

   en.wikipedia.org/wiki/Automotive_navigation_system

   An automotive navigation system is part of the automobile controls or a third party add-on used to find direction in an automobile. It typically uses a satellite navigation device to get its position data which is then correlated to a position on a road. When directions are needed routing can be calculated.

6. Tachograph - Wikipedia

   en.wikipedia.org/wiki/Tachograph

   The trace closest to the outer edge is the speed trace. The disc is preprinted with a speed scale and the stylus produces a mark corresponding with the speed of the vehicle at any given time. It is important that the maximum speed (Vmax) specification of the chart matches that of the tachograph head for the speed to be correctly recorded.

7. Lidar traffic enforcement - Wikipedia

   en.wikipedia.org/wiki/LIDAR_traffic_enforcement

   The speed of a vehicle occluded by (hidden behind) another vehicle cannot be measured. This occlusion issue does not apply to fixed speed enforcement devices that can be mounted on poles or gantries up to 5-6 meters / 15 -20 ft high using radar as detection method. Fixed and handheld lidar systems reliable up to heights of roughly 2 meters / 7 ft.