Spike, railway with spike and spike. We say the spike is mainly refers to the road with a spike. Also known as protuberant road signs. Is a kind of traffic safety facilities. Main installed in the middle of the road of marking or double yellow line, through the back reflection performance to remind the driver by the lane.

The specifications of the spike is commonly 100 mm * 100 mm * 20 mm, height is highest do not exceed 25 mm. There are many types of reflector, reflectors, reflective beads, led luminous, reflective film, etc.