CZ303027B6 - Rotary intersection for providing continuous and safe passage of vehicles with right of way an/or vehicles with oversize load - Google Patents

Abstract

The rotary intersection of the present invention comprises a roundabout junction (1) with a central island (2) and roads (3, 3?, 4, 4?) connected to the roundabout junction (1). In the central island (22), there is performed a passage (5) thereof formed by at least one traffic lane directing obliquely across the central island (2) from the roundabout junction (1) exit on the first road (3) to the roundabout junction (1) exit on at least the third road (3?) next from the entry onto the roundabout junction (1) past the first road (3). In front of the exits on the first road (3) and the third road (3?), there can be installed remotely controlled warning lights (6, 6?). A vehicle (7) with right of way and/or a vehicle (8) with oversize load cross the passage (5) of the central island (2), wherein it first runs on the first road (3) I counter direction and enters the roundabout junction through the exit onto the first road (3).

Description

(57)

The roundabout includes a roundabout (1) with a central island (2) and roadways (3, 3 ', 4,4') connected to a roundabout (1). A central island crossing (5) is formed in the central island (22), comprising at least one lane extending obliquely across the central island (2) from the exit from the roundabout (1) to the first road (3) to the exit from the roundabout (I) on at least a third road (3 ') following the entrance to the roundabout (1) along the first road (3). Before leaving the first road (3) and the third road (3 '), hazard warning lights (6.6') with remote control can be fitted. A genuine priority vehicle (7) and / or an overloaded vehicle (8) passes through a central island crossing (5) (2), first on the first road (3) upstream and at a roundabout (1) it exits onto the first road (3).

Roundabout to ensure smooth and safe passage of vehicles with priority right and / or vehicles with excessive load

Technical field

The invention relates to a roundabout with a so-called roundabout, the solution of which is to ensure the smooth passage of vehicles with right of way or vehicles with excessive loads.

BACKGROUND OF THE INVENTION

Roundabouts, which are based on roundabouts, are of increasing importance in modern design solutions for transport systems and roads. Their priority is, inter alia, to improve the flow of traffic, as well as to improve safety due to slowdown where the driver does not see the intersection through the raised central island and must slow down to give priority to vehicles coming from left or on the roundabout.

In the most common embodiment, the roundabout is in the form of a circle forming a roundabout to which four approximately rectangular, two-lane roads are connected, whose imaginary axes intersect approximately in the center of the central island.

The opposite traffic lanes on roads are usually separated by wedge-shaped dividing islands before approaching the roundabout.

The disadvantage of such a commonly designed roundabout is that at junctions of smaller diameters, it is difficult to pass long vehicles with excessive loads. this passage is completely liciiiožiiý. Ϊ́νίά-ιΐ To maintain the traffic throughput of these vehicles, the SC must propose a roundabout with a large diameter, which greatly increases the investment costs. Another disadvantage is that vehicles with the right of way, ie. Fire brigade (HZS), emergency medical assistance (RZP) and police (P) vehicles are slowed as they pass through a roundabout, as can other vehicles, which can directly endanger the life or health of a patient.

When these priority vehicles pass through an intersection with the warning and audible warning lights on, drivers of other vehicles often stop at an inappropriate location, for example, at a junction and block the priority vehicles. For RZP vehicles, passing through a roundabout is also problematic because, for example, when driving in a straight line, the vehicle has to make three relatively sharp turns (right, left and right), causing vehicle tilting and lateral acceleration, which causes complications leading to interruption or disabling of patient care while driving.

In order to facilitate and ensure better passage of vehicles with right-of-way and excessive loads through a straight-ahead intersection, roundabouts are known which, although in the form of a circle, are connected to a roundabout off the center so that their lines form a substantially straight chord at the periphery of the circle forming the roundabout. While this design of the roundabout allows accelerated passage of vehicles with right of way as well as excessive loads, the roundabout loses the essential safety feature by seeing straight ahead drivers on the main road, passing the roundabout essentially directly, and they therefore tend to travel at too high a speed at which they do not have to see the driver approaching the roundabout ahead of them from the side road from the left, thus increasing the safety risk of the roundabout. In addition, drivers in other directions have to make a roundabout on a very long curve.

-1 CZ 303027 B6

Another solution for the roundabout is that although the roads are connected to a roundabout in a regular cross-configuration, so that their imaginary axes intersect approximately in the center of the circle, the elevated central island has only a semi-circular ground plan. The remaining semicircle in the central part is a straight road through which, if necessary, a straight ahead junction as well as overhead can be used. This design has essentially the same safety risks and disadvantages as the above-mentioned roundabout solution with asymmetrically arranged access roads.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roundabout which eliminates the above-mentioned drawbacks and at the same time increases the safety of all road users in the accelerated passage of vehicles with right of way or excessive load.

SUMMARY OF THE INVENTION

The roundabout to ensure the smooth and safe passage of priority or overload vehicles includes a known central roundabout with at least three dual-lane roads connected to the roundabout. SUMMARY OF THE INVENTION The central island comprises a central island crossing formed by at least one lane running obliquely across the central island from the exit from the roundabout to the first road to the exit from the roundabout to at least the third road following the entry to the roundabout on the first road. The basic idea of creating a roundabout according to the invention is therefore that priority or overload vehicles pass a roundabout by crossing the central island, but which is situated so as to obscure the view of the area beyond the roundabout and not to reduce safety parameters of the existing intersection. This is achieved by the inclined position of the crossing and the approach of the vehicle to the roundabout from the opposite direction, ie from the exit from the roundabout to the first road on which the vehicle arrives.

In a preferred embodiment of the roundabout according to the invention, it is a classic roundabout where four roadways are connected to the roundabout in the shape of a cross, whose axes intersect approximately in the middle of the roundabout. At this intersection, the central island crossing points from the exit from the roundabout to the first road to the exit from the roundabout to the third road, the crossing axis being parallel to the axis of at least the first road, and portions of the central island are arranged on both sides of the crossing to obscure the view at the roundabout from the first road to the entrance to the roundabout from the third road.

The roundabout according to the invention is also suitable for roundabouts with three, five or more roads, but at a classic crossroads with four cross-roads, its advantages are most apparent. By reducing the diameter of the roundabout to a minimum while maintaining traffic throughput, significant investment savings are achieved.

Passage of vehicles with right of way as well as vehicles with excessive load through a roundabout can be controlled in various ways. According to one possibility, the roundabout according to the invention comprises at least two warning lights located in the direction of travel on the roundabout before the roundabout exits to which the ends of the central island crossing are directed, the warning lights provided with means for remote control from priority vehicles. driving. For installation at a roundabout, simple two-state warning lights can be used - flashing orange light and illuminated red light. A priority vehicle, such as an RZP vehicle, can turn on the red hazard warning lights using the remote control before arriving at the roundabout and switch red light to flashing orange light after leaving the roundabout.

-2GB 303027 B6

The principle of the smooth and safe passage of the above-described roundabout by a priority road vehicle is that the priority road vehicle arriving on the first roadway, before entering the roundabout, activates the light and / or audible warning device on the vehicle , crosses on the first road in the opposite direction, enters the roundabout by exiting the first road, crosses the central island crossing and exits the roundabout by exiting at least the third road in order from entering the roundabout from the first road, then turns off the light and / or audible warning device on the vehicle.

This method is particularly advantageous at less frequented roundabouts where warning lights are not installed or where warning lights are not installed for other reasons. A certain disadvantage is that some drivers may overlook the warning sign on the vehicle, react slowly or inappropriately, etc.

Therefore, in an even more advantageous variant of the smooth and safe passage of the roundabout by vehicles with priority right of entry, the warning lights installed at the intersection are used. Priority car on the first road, engages warning lights before approaching the roundabout by remote control, moves on the first road to the opposite direction, approaches the first roundabout, crosses the central island crossing and leaves the roundabout by exiting at least the third road in the order of the entrance to the roundabout, then turning off the hazard warning lights with the remote control. In this way of controlling the passage, the maximum possible level of safety is maintained at the roundabout for both the occupants of vehicles with right of way and other road users. Traffic at a roundabout shall be stopped only for the time necessary to pass the vehicle, and the drivers of vehicles passing the roundabout shall be given sufficient stop and notice in a timely manner.

Somewhat different is the way of smooth and safe passage of the above-described overloading vuziulcin intersection, which is based on the fact that, by means of traffic control: traffic stops before at least one exit from the roundabout towards which the end of the central island crossing is directed, and the overloaded vehicle arriving on the first road, crosses before arriving at the roundabout, arrives at the roundabout by exiting onto the first road, crosses the central island crossing and exits the roundabout by exiting at least on the third road in order from the roundabout roundabout, whereupon traffic control is released at the roundabout. The passage of vehicles with excessive load is similar to that of vehicles with the right of priority, but taking into account the different status that these vehicles have in road traffic according to the relevant traffic regulations.

The means of traffic control may be constituted by any known means. For vehicles with excessive loads, which are very often accompanied by escort vehicles, it is advantageous if the traffic control means comprise at least one escort vehicle which stops traffic before at least one exit from the roundabout to which the end of the central island crossing is directed, followed by the vehicle with an excessive load, he will drive to the roundabout through this exit, pass through the central island, leave the roundabout and then the escort vehicle will leave the roundabout.

In one variant of the method of passing an overloaded vehicle, which is accompanied by two accompanying vehicles, the front accompanying vehicle enters the roundabout by entering the first road, bypasses the roundabout and stops traffic before exiting the roundabout onto the first road . Subsequently, the overloaded vehicle arriving on the first road passes in the opposite direction before the roundabout, approaches the roundabout by exiting onto the first road and enters the central island crossing, where it stops. Then the rear escort vehicle passes the roundabout and leaves the roundabout by exiting onto the third road. The vehicle with excessive load will leave the level crossing and leave the roundabout by exit to the third

It will be positioned behind the rear escort vehicle. Finally, the front escort vehicle comes out of the roundabout and shifts into the overloaded vehicle.

In another variant of the method of smooth and safe passage of the roundabout by an overloaded vehicle, which is accompanied by two accompanying vehicles, it is defamatory that the front escort vehicle crosses the first road ahead of the first roundabout, with the hazard warning device first on the roundabout. bypassing the exit to the first road, ie. in the opposite direction, and stops traffic before exiting the roundabout onto the first road. The next procedure is the same as the method described in the previous preferred embodiment of the invention, i.e. the overloaded vehicle enters the first roadway to cross the central island, the rear escort vehicle passes through a roundabout, afterwards the overloaded vehicle is engaged, and finally the front escort vehicle comes out.

The advantages of the roundabout and the way it travels according to the present invention are in particular that the safety and smoothness of the intersection passage for other vehicles is not reduced, in particular because their drivers perceive the central island as a compact mass over which they do not see the intersection and oblique crossing the central island in normal traffic basically do not see. For a vehicle with priority right of way, especially for RZP vehicles, passing through a roundabout is not only much faster but also much more comfortable, without the negative consequences of lateral acceleration caused by passing sharp turns. The symmetry of the traffic solution is maintained, ie from all directions the vehicles run at a roundabout on approximately the same curve. For vehicles with excessive load, the roundabout represents a significant saving of time and fuel in the event of a bypass. For the investor, a roundabout brings considerable investment savings, because it is possible to build roundabouts of small diameters even where larger diameter roundabouts would otherwise have to be built to require the passage of vehicles with excessive loads.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view of a roundabout with warning lights showing the passage of a priority vehicle, and FIG. 2 is a schematic plan view of a roundabout showing the passing of an overloaded vehicle with two accompanying vehicles. 3 shows a schematic plan view of a roundabout showing the passage of an oversize vehicle with two accompanying vehicles, in the final stage of the passage.

DETAILED DESCRIPTION OF THE INVENTION

It is to be understood that the specific embodiments of the invention described and illustrated below are presented by way of illustration and not by way of limitation of the examples to the examples. Those skilled in the art will find, or will be able to ascertain, using routine experimentation, more or less equivalents to specific embodiments of the invention specifically described herein. These equivalents will also be included within the scope of the following claims.

FIG. 1 schematically shows a roundabout with a roundabout I to which four roadways 3, 3 ', 4, 4' are connected approximately in the shape of a cross. Road axes 3, 3 ', 4, 4' intersect approximately in the middle of roundabout 1, where the central island 2 is raised. Roads 3, 3 ', 4, 4' are two-lane and widen in the area adjacent to roundabout 1. and the lanes for entering roundabout 1 and exiting roundabout 1 are separated from each other by wedge-shaped dividing belts 15. For the purposes of this description, the numbering of the roads leading into the roundabout is used in the order of succession when approaching the roundabout 1 and passing roundabout: first road 3, second road 4, third road 3 ', fourth road

-4GB 303027 Β6

4 '. The third roadway 3 'in the continuation of the first roadway 3 forms the main road along which it is assumed that there will be an increased passage of vehicles with right of way or vehicles with an overload.

The roundabout is designed so that a cross 5 of the central island 2, which is formed by a single lane, is guided across the center of the central island 2. This lane is guided obliquely across the central island 2 so that its axis is parallel to the axis of the first roadway 3 and the second roadway 3 ', one end of the crossing 5 facing the exit from the roundabout 1 to the first road 3 and the other end of the crossing 5 is directed against the exit of the roundabout I onto the third road 3 '. The passage 5 is formed flush with the roads 3, 3 ', 4, 4' even though it passes over the raised central island 2. This causes the remaining portions of the central island 2, which are elevated and planted against the passage 5, to obscure the view from the entrance to the roundabout 1 from the first roadway 3 to the entrance to the roundabout 1 from the third roadway 3 'and drivers must thus slow down as they pass through the same way as at a regular roundabout.

In the above-described embodiment of the roundabout, the right-of-way vehicle 7 can be driven in such a way that the right-of-way vehicle 7, for example an RZP, arrives at the roundabout even on the first road 3. Before entering the roundabout i the vehicle crew 7 operating a light and / or audible warning device which is part of the vehicle. The drivers of the vehicles 12 passing the roundabout 1 stop as well as the drivers of the vehicles 11, 13 and 11 arriving at the roundabout I on the second road 4, the third road 3 'and the fourth road 4'. The vehicle 7 crosses on the first road 3 in the opposite direction, passes the wedge-shaped dividing island 15 from the left and enters the roundabout not by the entrance from the first road 3 but by the exit on the first road 3. by exiting onto the third roadway 3 ', switching off the warning device. Drivers of other vehicles 11, 12, 13, 14 can continue to drive.

In another exemplary embodiment, the carcasses also shown in FIG. 1, the roundabout is equipped with a pair of hazard warning lights 6, 6 '. The first warning light 6 is mounted on the roundabout 1 before leaving the roundabout and on the first road 3. The second warning light 6 'is mounted on the roundabout 1 before leaving the roundabout and on the third road 3'. Both hazard warning lights 6, 6 'are provided with synchronized circuits for their remote control from priority road vehicles 7, where the remote control can change the "flashing orange light" status to a "stop" warning signal, indicated by a shining red light.

In this exemplary embodiment, the right-of-way round-trip vehicle 7 passes such that a first-priority road 7, such as a fire brigade vehicle arriving at a roundabout on the first roadway 3, first actuates both hazard warning lights with the remote control. 6, 6 '. The vehicles 12 at the roundabout 1 stop before exits, and consequently the vehicles 13, 13 and 14 also stop at the arrivals from the other roads 4, 3 ', 4'. Subsequently, the vehicle 7 crosses on the first road 3 in the opposite direction around the wedge-shaped central island 5, approaches the roundabout and the exit onto the first road 3, crosses the crossover 5 of the central island 2 and leaves the roundabout and the exit onto the third road 3 '. With the remote control, the hazard warning lights 6, 6 'switch to' flashing orange 'mode and vehicles H, 12, H and 14 continue to drive.

FIGS. 2 and 3 show the same roundabout as in FIG. 1 but in the overload mode of the vehicle. In the case of an overloaded vehicle 8, the crossing of the roundabout can be effected, for example, by stopping a traffic officer, driver or other person by means of adjusting targets or other means including warning lights before leaving the roundabout 1 onto the first roadway 3. i before leaving the roundabout and on the third road 3 Vehicles at the roundabout and vehicles on the arrivals stop. The overloaded vehicle 8 traverses the roundabout as well as the right-of-way vehicle 7 according to the previous examples, whereupon the traffic at the roundabout 1 is released to normal mode.

- 5 GB 303027 B6

In another embodiment of the method of crossing a roundabout, an overloaded vehicle 8 is accompanied by one front escort vehicle 9. The accompanying vehicle 9 initially enters the roundabout 1 in a conventional manner, bypasses it and stops traffic at the exit onto the first road 3 on which the vehicle 8 arrives. with excessive loads. This crosses into the opposite direction and enters crossing 5 of Central Island 2, where it stops. The front escort vehicle 9 will travel to the third road 3, where it will stop the traffic again. The oversize vehicle 8 exits the level crossing 5 and leaves the roundabout 1 by exiting onto the third road 3 '. The front escort vehicle 9 immediately overtakes it and continues driving.

In another embodiment of the roundabout of FIG. 2 and FIG. 3, the overload vehicle 8 may be accompanied by a front escort vehicle 9 and a back escort vehicle 10. There may be two alternatives to the passage.

The front escort vehicle 9 first enters the roundabout 1 by entering the first road 3, bypasses the roundabout 1 and stops traffic before exiting the roundabout I onto the first road 3, then the excess cargo vehicle 8 arriving on the first road 3 passes before the roundabout in the opposite direction, it starts at the roundabout and at the exit on the first road 3 and enters the crossing 5 of the central island 2, where it stops, then the rear escort vehicle 10 passes the roundabout 1 and leaves the roundabout X exit at the third road 3 ' 9 bypasses part of the roundabout X and stops traffic before exiting the roundabout X onto the third road 3 ', whereupon the heavy-duty vehicle 8 exits from level 5 and leaves the roundabout X by exit on the third road 3' where it joins behind the rear escort vehicle XO, and finally the front escort vehicle 9 exits from roundabout X and shifts into the vehicle for 8 s excessive load.

The second alternative of crossing the roundabout shown in Figures 2 and 3 is such that the front escort vehicle 9 before the roundabout X passes on the first roadway 3 in the opposite direction, with the light warning device on first entering the roundabout X directly in the opposite exit on the first road 3 and stops the traffic before leaving the roundabout X on the first road. The next passage is the same as for the first alternative. The overloaded vehicle 8 also crosses on the first road 3, enters the roundabout X also by exiting onto the first road 3 and enters the crossing 5 of the central island, where it slows or stops. The second escort vehicle X0 passes the roundabout in the usual manner and exits onto the third road 3 ', followed by the oversize vehicle 8 and finally the front vehicle 9, which releases traffic at the roundabout.

Industrial applicability

The solution according to the invention can be used in the construction of new roundabouts as well as in the reconstruction of existing roundabouts to ensure the smooth and safe passage of vehicles with right of way or vehicles with excessive load.

Claims (3)

PATENT CLAIMS 1. A roundabout to ensure the smooth and safe passage of vehicles (7) with priority right and / or vehicles (8) with an overload, comprising a roundabout (1) with a raised central island (2) where a roundabout (1) ) are connected at least three two-lane roads (3, 3 ', 4, 4'), characterized in that in the central island (2) there is formed a crossing (5) of the central island (2) formed by at least one lane running obliquely through the central island (2) from the exit from the roundabout (1) to the first road (3) to the exit from the roundabout (I) on at least the third road (3 ') following the entrance to the roundabout (1) along the first road (3) ). -6GB 303027 B6 A roundabout as claimed in claim 1, characterized in that four roadways (3, 3 ', 4, 4') are connected to the roundabout (1) in the form of a cross, whose axes intersect approximately in the middle of the roundabout (1) , and the crossing (5) of the central island (2) extends from the exit from the roundabout (1) to the first road (3) to the exit from the roundabout (1) to the third road (3 '), the crossing axis (5) being parallel with the axis of at least the first road (3), and parts of the central island (2) are arranged on both sides of the crossing (5) to cover the view from the entrance to the roundabout (1) from the first road (3) to the entrance to the roundabout (1) from the third road (3 '). Roundabout according to claim 1 or 2, characterized in that it comprises at least two warning lights (6, 6 ') located in the direction of travel on the roundabout (1) before the exits from the roundabout (1) to which they are directed the end of the crossing (5) of the central island (2), the warning lights (6, 6 ') being provided with means for remote control from the vehicles (7) with right of way.