... hump: 4. They are relatively inexpensiveThey are relatively easy for bicycles to cross if designed appropriatelyThey are very effective in ... are not a major concern. 6. Usage:* Mainly used for city intersection, highroad crossing, toll gate,garden, village, parking ... lot, and gas station, etc. 7. fixer for asphalt roads : expansive screw (standard parts, the customercan easily purchase ...