The Organizing of Smart Lighting in City and Highway

The intelligent control system for smart city lighting is discussed in a paper. System is applicable for electric lighting of streets, highways, and surrounding areas. The system combines the motion sensors and the lighting fixtures are into single network. The automatic switching of lighting fixtures into a mode of reduced power is carried out while the external natural light level is higher a certain threshold value. When the moving object is appeared in nearby proximity of motion sensors its speed and direction of movement are determined. With regards these values the needed number of local lighting fixtures is determined. The powers of these lighting fixtures should be turned on the certain level. In other words the appearance of moving object at the next illuminated point is predicted. The increasing of lighting fixtures power of is carried out smoothly while the moving object is approaching to corresponding lamp post. Due to the dynamic power control of lighting fixtures the significant energy saving is achieved. The safety of traffic is increased, because of the lighting fixtures number, which operates with increased power, is determined by moving object speed. The possible braking distance of moving object will be significantly less than the roadway illuminated section. Smooth change of lighting fixture power reduces the pressure on vehicle driver.