... lot, and gas station, etc. 7. fixer for asphalt roads : expansive screw (standard parts, the customercan easily ... of the road 9. Speed bumps can be installed on the surface of asphalt roads and ... concrete roads 10. For A type road bumps, use a ... baton, solar warning/working light, Traffic Direction Sign, road cone, Reflective Guide Pillars, Warning Triangle, Caution ...