rofety / Safety installations

There is a hole in the below of lane. Holes in each two lane has been installed.There are button in the holes. Button in t
he holes can not be pressed when the tire is the passLED of lane is the charge to be solar.Pressing the button changes the LED lights in red.Use a charged LED lights. Use a charged LED lights. From the point of an accident until behind 500m the red light turns on.