Sonic the Hedgehog is the title character of Sega's flagship video game franchise, who first appeared in 1991 in his first game for the Sega Genesis console (also known as the Mega Drive outside of North America).
When this beam is reï¬ected back to the laser unit, the unit provides a speed reading. Because of the narrow beams, laser units are hand-held, and can only be used from a stationary position.Common laser errors Both human error and the nature of laser light contribute to errors. For example, laser can only be used at a distance of a thousand feet. This does not give much time for aiming or vehicle identiï¬cation. Environmental and usage conditions also aï¬ect laser. Rain, fog, and snow can lead to false readings, as can reï¬ections of laser light from highway structures and other vehicles. As with any complex electronic device, there can be technical malfunctions and miscalibrations.
How Traffic Radar Works. Traffic radar uses a radar beam to measure speed. Think of the beam as a searchlight. Itâs invisible because itâs made of microwaves instead of light, but otherwise it acts very much like a light beam. It travels in straight lines.