Device for speed restriction of vehicles

Details Device for speed restriction of vehicles Device for speed restriction of vehicles

1998-04-30

2000-02-15

Will, Thomas B.

Road structure, process, or apparatus

Traffic director

Vibration inducing member

404 9, E01F 1100, E01F 900

Patent

active

060245107

ABSTRACT:
An adaptive speed restriction device is disclosed for use on roads against peeding vehicles. The device comprises an elongated hollow element having a preselected length defining a cavity, an impervious and elastic casing having at least one upper surface presenting a hump; at least one air outlet vent that allows for flow of air from inside the casing outwards to the open atmosphere when external pressure is exerted on the upper surface, the upper surface collapsible into a flat surface as air flows out of the cavity; and an air inlet vent that allows flow of air outside of the casing into the cavity when the external pressure is not exerted on the upper surface. When a vehicle passes over the hump, pressure is exerted on the upper surface which expels air outside through the air outlet vent. The maximum flow rate of air exiting the cavity is adaptive to the speed of the vehicle passing over the device. The air outlet vent can be adjusted to allow the device to accommodate various allowed vehicle speeds.

REFERENCES:
patent: 3720181 (1973-03-01), Elkins
patent: 5306105 (1994-04-01), Langbrandner et al.
patent: 5769563 (1998-06-01), Flynn

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