DE3921553A1 - Safety measure for exit road - includes sleepers set in carriageway which have projecting square shoulder along trailing edge - Google Patents

Abstract

Mechanical safety measures against vehicle drivers attempting to drive on to a motorway by means of an exit road. Safety sleepers having a saw tooth cross section (1, 1a) are let into the carriageway (2, 4) with one trailing edge projecting above the surface. Vehicles leaving by the exit road experience only a slight unevenness, but those travelling in the wrong direction receive a sharp jolt from the projecting shoulder of the sleeper. USE/ADVANTAGE - Each sleeper presents a vertical shoulder which severly jolts the wheel of any vehicle travelling in the wrong direct1on.

Description

The invention relates to a mechanical security measure against entering in the opposite direction Motorway exits.

The traffic signs showing the entrance in opposite directions Driving directions are often prohibited by drivers overlooked and this leads to dangerous traffic situations.

From traffic announcements on the radio one can see that most wrong-way drivers the traffic signs when bad Overlooked visibility.

Additional visual measures therefore leave no verb expect change.

The invention is based, in addition to the task known measures a further mechanical attach the wrong-way driver to his wrong Direction of travel due to bumps, such as in road bumps traffic-calmed residential streets are known to be attentive do.

The solution according to the invention takes place in that on the Roadways of the motorway exits with safety thresholds a triangular, sawtooth-like cross-section be attached to the vehicles driving the freeway leave just a slight bump in the road perceive the wrong-way drivers but perceive violent impacts and thereby be aware of the wrong direction of travel be made.

The advantage of the invention is that the wrong driver through the bumps caused by the safety thresholds right at the start of entering the motorway in the opposite direction set driving direction are generated, even in bad Visibility alerted to his mistake and can change the direction of travel in good time.

The invention is closer and example with reference to the figures explained wisely:

Fig. 1 shows a cross section through a single security threshold.

Fig. 2 shows another variant of a single security threshold.

Fig. 3 is a plan view of an example lane design with a group of safety thresholds.

As shown in Fig. 1, the safety threshold ( 1 ) has a sawtooth-like cross section. It is inserted into the roadway ( 2 ) in such a way that it does not provide any rolling resistance in the correct direction of travel, but in the opposite direction of travel it causes a knock on the rolling wheel ( 3 ).

The cross section shown in Fig. 2 allows a greater height of the safety threshold ( 1 a).

The safety thresholds can be used as concrete components or prefabricated as cast steel parts, also subsequently in existing lanes are used.

They can be used individually or at larger intervals lined up groups can be attached.

A preferred embodiment is that the safety thresholds ( 1 , or 1 a) with their sawtooth-like cross-section protrude from the road surface ( 2 ). This version has the advantage that there are no water-collecting dents that could lead to ice spots in winter; snow removal is also not hindered.

A danger to the vehicles leaving the Safety thresholds are not given as they are in one Area, behind which there is always a traffic sign Right of way is given and thus with a reduced Speed is driven.

Fig. 3 shows a plan view of an example lane design ( 2 ) with a group of safety thresholds ( 1 , or 1 a).

An interrupted arrangement of the safety thresholds in the middle area of the carriageway ( 4 ) allows motorcyclists a completely bumpless exit.

Another version is that the safety thresholds ( 1 , or 1 a) are only attached to one side of the road, but so that a wheel of a car must always drive over the safety thresholds.

This version also enables motorcyclists smooth exit.

Further preferred designs are in the sub claims described.

Claims (6)

1. Mechanical security measure against retraction in the opposite direction when you exit the motorway journeys, consisting of safety thresholds in the roadway are brought in and when driving in the wrong direction due to strong impacts in the chassis get the driver's attention in in the right direction but only as a slight bump be perceived. 2. Mechanical security measure against retraction in the opposite direction when you exit the motorway journeys, according to claim 1, characterized in that the safety thresholds are sawtooth-like Cross section. 3. Mechanical security measure against retraction in the opposite direction when you exit the motorway rides, according to claims 1 and 2, characterized characterized in that they are used as concrete components or prefabricated as cast steel parts, also afterwards can be used in existing lanes. 4. Mechanical security measure against retraction in the opposite direction when you exit the motorway rides, according to claims 1 to 3, characterized characterized in that the security thresholds with their sawtooth-like cross-section from driving protrude web surface. 5. Mechanical security measure against retraction in the opposite direction when you exit the motorway rides, according to claims 1 to 4, characterized characterized in that a in the middle of the range Roadway broken arrangement of safety swell is provided. 6. Mechanical security measure against retraction in the opposite direction when you exit the motorway rides, according to claims 1 to 5, characterized marked that the security thresholds only on one side of the road, but like that that a wheel of a car’s always about safety must drive swell.