| 摘要 |
A road-marking device (1) is provided by means of which thick ribs (32) of water- based paint are applied to a road surface transversely to the road axis. Eac h rib is formed by a high-volume spray of paint from a nozzle (28) mounted on a horizontal carriage (8) mounted for reciprocal movement along a bar (6) supported by a vehicle carrying the device. Rotation of a road wheel (2) is caused to drive the carriage in both directions along the bar, while the spraying operation is controlled by the position of 'on' and 'off' switches (12) in the path of the carriage. Although only paint may be sprayed, it is preferred to inject into the paint , before it is deposited on the road, particles of a water-absorbing material to cause the paint forming the ribs to set so quickly that vehicles may contact the rumble stri p without deforming the ribs soon after they have been deposited.
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