Method to distribute wear from passing vehicles over a road surf

Road structure – process – or apparatus – Process

Patent

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404 9, E01F 900

Patent

active

044405219

DESCRIPTION:

BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION

The invention of this application is disclosed in corresponding International Application No. PCT/SE81/00159 filed June 2, 1981, the benefit of which is being claimed.


BACKGROUND OF THE INVENTION

The present invention relates over a method for distributing wear from passing vehicles to a road surface.
Due to the wear imposed on a road surface from vehicles travelling along the same, mainly concave ruts are formed in each lane, spaced apart at a distance basically corresponding to the wheel-base of common types of vehicles. Such wear is often accentuated during the winter, when a large number of vehicles are fitted with studded tires, and the ruts in the road surface are particularly dangerous during spring, when melting snow and rain fill the ruts with water, since a hydroplaning might occur when a vehicle is travelling at high speed with the wheels in said ruts. The damage caused to the road surface by passing vehicles has previously been regarded as unavoidable, and road surfaces with a high traffic intensity have been re-asphalted at short intervals of time. This has resulted in high road maintenance costs, and also in reductions of the traffic volume when such work is being carried out, since certain lanes of road sections must be closed for traffic while the maintenance work takes place. Such work also involves obvious risks of accidents, involving the maintenance staff performing the necessary re-asphalting operation. Accordingly, it would be extremely desirable to distribute the wear more evenly over the road surface, partly in order to reduce the maintenance costs, but also to reduce the risk of accidents caused by hydroplaning, since such risk is increased when deep ruts exist in a road surface.


SUMMARY OF THE INVENTION

The present invention discloses a method whereby wear is more evenly distributed over a road surface, thus reducing the risk of hydroplaning, as well as prolonging the interval of time between each re-asphalting operation, thereby considerably reducing the maintenance costs. A further advantage is, that the prolonged interval of time between each maintenance operation also results in the possibility of maintaining a larger traffic volume for longer periods of time.
The method according to the present invention is mainly characterised in that marks with a predetermined configuration are painted on the road surface, spaced apart from each other and extending in the direction of the road, said marks preferably being arranged in a different color to existing road marking lines and located adjacent but in a laterally displaced relationship to existing ruts formed by passing vehicles in the road surface. Vehicles travelling along the road are directed to pass over the marks applied to the road surface by the wheel located most adjacent to the applied marks, and new marks are applied when the first applied marks have been basically worn away, the new marks being further moved in a lateral relationship to the marks first applied.


BRIEF DESCRIPTION OF THE DRAWINGS

The method according to the present invention is more fully described below, reference being made to the accompanying drawing, in which:
FIG. 1 shows a view from above of a road surface, having one lane for travel in each direction, arranged with marks according to a first embodiment of the present invention.
FIG. 2 shows a view of a road corresponding to FIG. 1 having marks applied according to a second embodiment of the present invention.


DETAILED DESCRIPTION OF THE INVENTION

Reference numerals 1, 1' denominate two lanes in a road, intended to faciliate single lane traffic in two opposed directions. The road surface is in a previously known manner arranged with a road centre line 2, which separates the two lanes 1, 1' from each other.
The embodiment shown in FIG. 1 is a preferred embodiment, according to which a dot or line mark 3, 3' is applied in each lane, and this is assumed to the first marks applied to the road surface in each lane 1, 1'. Said first marks 3, 3' are locate

REFERENCES:
patent: 2260051 (1941-10-01), Pardee
patent: 2287685 (1942-06-01), Jelinek
patent: 2931279 (1960-04-01), Wiswell
patent: 3263578 (1966-08-01), Pilcher
patent: 3768383 (1973-10-01), Tucker
patent: 3936207 (1976-02-01), Sticha
patent: 4245888 (1981-01-01), Wardecki
"Strasse und Autobahn", No. 9, pp. 391-392, (1973).

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