Warning device for tidal lane change and installation method thereof

Abstract

The present application relates to the technical field of road traffic warning device, especially to a warning device suitable for tidal lane conversion and its installation method, comprising a plurality of trigger devices arranged at the position of double yellow dashed lines on both sides of the lane, a control device arranged on one side of the plurality of trigger devices, an auxiliary rotating device for installing the plurality of trigger devices, and an overall rotating device arranged below the plurality of trigger devices; one side of each trigger device is provided with a warning device; the warning device comprises a warning block, a compression spring damper arranged below the warning block, and a cast iron rod member with a convex thread arranged below the compression spring damper, and the bottom of the cast iron rod member with a convex thread is provided with a cast iron with a fixed gear. The present application realizes inversion by rotating the ground rotating shaft to control each group of units, achieves road control changing with the change of tidal lane, can be suitable for various different tidal phenomena, and effectively guides the vehicle to drive normally according to the traffic signal.

Description

Technical Field

[0001] This invention relates to the field of road traffic warning devices, and in particular to a warning device suitable for tidal lane changes and its installation method. Background Technology

[0002] With the acceleration of urbanization and the growth of traffic demand, tidal flow lanes have been widely used worldwide. Many cities have implemented tidal flow lanes on major roads and highways to improve traffic flow and increase road capacity.

[0003] There are currently two main ways to implement tidal flow lanes:

[0004] One method involves using traffic signs, traffic lights, or similar devices to remind drivers to give way to one or more tidal flow lanes. This is a non-mandatory tidal flow lane facility, without fixed devices separating the lanes. It is suitable for situations where the tidal flow is relatively stable and the traffic volume distribution coefficient does not change significantly over a long period. However, if vehicles travel in the opposite direction, it will cause traffic chaos and severe congestion. This not only wastes more people's time but may also cause traffic accidents, threatening everyone's lives.

[0005] Secondly, specialized zipper trucks are used to move the traffic barriers one or more lanes to create tidal flow lanes. This method offers the advantage of dynamically allocating lanes, further enhancing the safety and efficiency of tidal flow lanes through physical separation. However, this technology is only suitable for urban roads where traffic volume distribution varies significantly. Encountering obstacles during the relocation process will waste considerable time, and the need for zipper trucks for each lane change increases costs. Furthermore, if the barriers are accidentally bumped or knocked off their original positions after relocation, it will pose a safety hazard to drivers using the tidal flow lanes. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a warning device and its installation method suitable for tidal lane changes. The device controls the reversal of each unit by rotating a ground-mounted axis, achieving road control that changes with the tidal lane. It is applicable to various tidal phenomena and has a fixed position, effectively guiding vehicles to drive normally according to traffic signals.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A warning device suitable for tidal lane changes includes multiple triggering devices arranged at the double yellow dashed lines on both sides of the lane, a control device located on one side of the multiple triggering devices, an auxiliary rotating device for mounting the multiple triggering devices, and an overall rotating device located below the multiple triggering devices; the multiple triggering devices are arranged sequentially at intervals, and a warning device is provided on one side of each triggering device.

[0009] The warning device includes a warning block, a compression spring damper located below the warning block, and a cast iron rod with a convex thread located below the compression spring damper. The bottom of the cast iron rod with a convex thread is provided with a cast iron with a fixed gear. The cast iron rod with a convex thread is connected to the cast iron with the fixed gear through threads. The outer side of the cast iron rod with a convex thread is provided with a cast iron shell.

[0010] Each of the triggering devices includes a trigger handle mounted on a cast iron housing, a linkage force transmission assembly located below the trigger handle, and a slidable block located on one side of the bottom of the linkage force transmission assembly. The slidable block can slide within a groove opened on the cast iron housing, and a tension spring is provided inside the groove.

[0011] Preferably, the auxiliary rotating device includes a precast concrete trench and a precast concrete block disposed on the precast concrete trench. The precast concrete block is provided with a hollow cylinder for installing multiple triggering devices. Roller kits are arranged around the inner wall of each hollow cylinder, and a hole is reserved at the bottom of each hollow cylinder for installing a cast iron rod with a convex thread.

[0012] Preferably, the control device includes a cover plate, a bearing, and a rotating shaft sleeved with the bearing. The top of the rotating shaft is provided with a rotating handle, and the bottom of the rotating shaft is provided with a cast iron rod with a convex thread. The lower part of the cast iron rod with the convex thread is connected to a cast iron rod with a fixed gear by a thread.

[0013] Preferably, the overall rotating device includes multiple ground shafts disposed in a precast concrete trench and a chain disposed above the multiple ground shafts. The chain is horizontally arranged, the multiple ground shafts are arranged sequentially at intervals, and each ground shaft has a cast iron hemisphere for mounting a fixed gear inside. The inner wall of the hemisphere is provided with a roller assembly.

[0014] Preferably, the linkage force transmission assembly includes a first link, a second link, and a third link. One end of the first link is provided with a first hinge, and the other end of the first link is connected to one end of the second link and the third link respectively through a second hinge. The other ends of the second link and the third link are provided with a third hinge and a fourth hinge respectively.

[0015] Preferably, the top of the warning block is curved, and the side of the warning block near the triggering device is vertical, with an extension space for the sliding block to slide on the vertical surface.

[0016] Preferably, the upper part of the cast iron with the fixed gear is provided with a concave threaded groove, and the lower end of the cast iron with the fixed gear is provided with a round head for rolling.

[0017] By adopting the above technical solution, the rotation of the ground rotating shaft controls the reversal of each unit, achieving road control that changes with the tidal lane. This solution is applicable to various tidal phenomena, has a fixed position, and can effectively guide vehicles to drive normally according to traffic signals. It prevents violations such as arbitrary lane changes, arbitrary turns, and arbitrary overtaking, without affecting normal lane changing behavior. It does not require the participation of a zipper truck, saving costs.

[0018] The present invention also provides a method for installing a warning device suitable for tidal lane changes, comprising the following steps:

[0019] Step 1: Fabrication of individual precast concrete blocks and precast concrete trench components: Precast concrete blocks are manufactured at the precast component processing plant. The length of each precast concrete block is A1 = 2–4 m, width is B1 = 40–45 cm, and thickness is H2 = 60–80 cm. Five hollowed-out cylinders with a diameter D = 40–45 cm and a depth H1 = 40–60 cm are formed in the center. A cube has dimensions A5 = 20–20 cm. Precast concrete trenches are manufactured at the precast component processing plant. The length of each precast concrete trench is A = 2 m. The precast concrete blocks are 2-4.4m long, with a width of B = 80-100cm and a thickness of H = 80-100cm. There are two excavated cuboids in the middle. The upper cuboid has a length of A1 = 2-4m, a width of B1 = 40-45cm, and a thickness of H2 = 60-80cm. The lower cuboid has a length of A6 = 1.9-3.8m, a width of B4 = 25-30cm, and a thickness of H3 = 20-40cm. After the individual precast concrete blocks and individual precast concrete trenches are fabricated, they are transported to the designated location for installation.

[0020] Step 2: Excavating and Cutting Strip-Shaped Foundation Trenches: First, measure and locate the strip-shaped foundation trench to be excavated between the double yellow dashed lines; the width of the strip-shaped foundation trench should be 10-20mm wider and the depth should be 10-20mm deeper than the precast concrete trench; then, use a cutting machine to cut the road surface to its full thickness, strictly controlling the depth during cutting to avoid damaging the base layer; after cutting, road surface fragments should be collected and properly disposed of, and it is strictly forbidden to discard them at will; finally, compact the road base layer and spread dry-mixed mortar with a water-cement ratio of 0.2 as a leveling layer, with the spreading thickness controlled within 20mm;

[0021] Step 3: Assemble the warning system: Arrange five triggering devices, warning devices, an auxiliary rotating device, an overall rotating device, and a control device in the warning system of one unit;

[0022] Step 4: Install the double yellow dashed line warning system in place: According to the positioning line, vertically place the assembled double yellow dashed line warning system into the road surface strip groove;

[0023] Step 5: Filling the road surface gaps: After the unit double yellow dashed line warning system is installed, single-sized crushed stone of the same width as the gap is squeezed into the joint between the road surface and the precast concrete groove to improve the interlocking force between the road panels and enhance the load transfer performance.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This invention controls the reversal of each unit by rotating the ground rotation axis, achieving road control that changes with the tidal lane. It is applicable to various tidal phenomena and its position is fixed, effectively guiding vehicles to drive normally according to traffic signals.

[0026] 2. This invention can effectively prevent illegal lane changes, reduce the occurrence of accidents, and ensure driving safety; it is also highly adaptable and can change the tidal lane according to actual traffic conditions.

[0027] 3. The warning device in this invention is easy to install, which saves manpower and financial resources for construction to a certain extent and reduces construction costs.

[0028] 4. This invention adopts a purely mechanical design, does not require power supply, is highly adaptable, and is more convenient to use. Attached Figure Description

[0029] Figure 1 This is a plan view of the invention deployed in a road scene;

[0030] Figure 2 This is a plan view of the single-sided tidal flow lane of the present invention;

[0031] Figure 3 for Figure 2 Plan view along the AA direction;

[0032] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0033] Figure 5 A schematic diagram of the warning device for a single-sided tidal flow lane in case of illegal lane changes;

[0034] Figure 6 A schematic diagram of a warning device for a single-sided tidal flow lane during normal lane changes;

[0035] Figure 7 for Figure 4 Enlarged diagram of section C;

[0036] Figure 8 This is a schematic diagram of the linkage force transmission assembly in this invention;

[0037] Figure 9 This is a dimensional diagram of the precast concrete block in this invention;

[0038] Figure 10 This is a dimensional diagram of the precast concrete trench in this invention. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the scope of protection of the present invention. The embodiments described in this invention are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] Reference Figures 1-10 A warning device suitable for tidal lane changes includes multiple triggering devices arranged at the double yellow dashed lines on both sides of the lane, a control device located on one side of the multiple triggering devices, an auxiliary rotating device for mounting the multiple triggering devices, and an overall rotating device located below the multiple triggering devices; the multiple triggering devices are arranged sequentially at intervals, and a warning device is provided on one side of each triggering device.

[0041] Reference Figures 2-4 The warning device includes a warning block 1, a compression spring damper 8 located below the warning block 1, and a cast iron rod 10 with a convex thread located below the compression spring damper 8. The bottom of the cast iron rod 10 with a convex thread is provided with a cast iron 11 with a fixed gear. The cast iron rod 10 with a convex thread is connected to the cast iron 11 with a fixed gear by threads. The outer side of the cast iron rod 10 with a convex thread is provided with a cast iron outer shell 9. In practical application, yellow reflective paint is applied to both sides and the vertical surface of the warning block to remind the driver.

[0042] Reference Figure 6 Each of the triggering devices includes a trigger handle 2 mounted on a cast iron housing 9, a connecting rod force transmission assembly 3 located below the trigger handle 2, and a slidable locking block 4 located on one side of the bottom of the connecting rod force transmission assembly 3. The slidable locking block 4 can slide within a groove 5 opened on the cast iron housing 9, and a tension spring 6 is provided inside the groove 5.

[0043] In this embodiment, there are five triggering devices, which are arranged sequentially at intervals. In actual applications, the number of triggering devices can be determined according to the actual situation to meet the usage requirements.

[0044] Specifically, refer to Figures 2-3 The auxiliary rotating device includes a precast concrete trench 18 and a precast concrete block 17 disposed on the precast concrete trench 18. The precast concrete block 17 is provided with a hollow cylinder for installing multiple triggering devices. Roller kits 16 are arranged around the inner wall of each hollow cylinder, and a hole for installing a cast iron rod 10 with a convex thread is reserved at the bottom of each hollow cylinder.

[0045] In this embodiment, in practical application, the size of the warning device and the spacing between each triggering device are determined according to the dimensions of the device. The hollow cylinder is used to install multiple triggering devices, and the holes are used to install the cast iron rod 10 with convex threads.

[0046] Specifically, refer to Figure 3 The control device includes a cover plate 15, a bearing 13, and a rotating shaft 12 sleeved with the bearing 13. The top of the rotating shaft 12 is provided with a rotating handle 14, and the bottom of the rotating shaft 12 is provided with a cast iron rod 10 with a convex thread. The lower part of the cast iron rod 10 with the convex thread is connected to a cast iron rod 11 with a fixed gear by a thread.

[0047] Specifically, refer to Figure 3 The overall rotating device includes multiple ground shafts 19 disposed in a precast concrete trench 18 and a chain 20 disposed above the multiple ground shafts 19. The chain 20 is horizontally arranged, the multiple ground shafts 19 are arranged at intervals in sequence, and each ground shaft 19 has a hemisphere for installing a cast iron 11 with a fixed gear. The inner wall of the hemisphere is provided with a roller kit 16.

[0048] In this embodiment, multiple ground shafts 19 are arranged one-to-one with the aforementioned triggering device and control device, so that the cast iron 11 with fixed gear is installed with the hemisphere inside the ground shaft 19, and a roller kit 16 is used to facilitate the rotation of the triggering device and control device.

[0049] Specifically, refer to Figure 7 The linkage force transmission assembly 3 includes a first link 301, a second link 302 and a third link 303. One end of the first link 301 is provided with a first hinge 304. The other end of the first link 301 is connected to one end of the second link 302 and the third link 303 respectively through a second hinge 305. The other ends of the second link 302 and the third link 303 are provided with a third hinge 306 and a fourth hinge 307 respectively.

[0050] Specifically, refer to Figure 4The top of the warning block 1 is curved, and the side of the warning block 1 near the triggering device is a vertical surface. An extension space 101 for sliding the slidable card block 4 is provided on the vertical surface.

[0051] In this embodiment, when the trigger handle 2 is activated, the interaction between the first link 301, the second link 302 and the third link 303 of the linkage force transmission assembly 3 can cause the slidable block 4 to slide into the extension space 101 of the warning block 1.

[0052] Specifically, the upper part of the cast iron 11 with the fixed gear is provided with a concave threaded groove, and the lower end of the cast iron 11 with the fixed gear is provided with a round head for rolling.

[0053] In this embodiment, the cast iron 11 with the fixed gear is threaded to the cast iron rod 10 with the convex thread through the concave thread groove, and then spot welding is used to prevent it from loosening; the lower end of the cast iron 11 with the fixed gear is mounted with a round head and a hemisphere inside the ground shaft 19 so that it can rotate in the hemisphere inside the ground shaft 19 in conjunction with the roller assembly 16.

[0054] The working process of this invention: Refer to Figures 5-6 When the traffic conditions in the tidal flow lane are aligned with the driving path of the left lane but opposite to that of the right lane, the left-side warning system is positioned opposite the curved surface of warning block 1. In this case, vehicles in the left lane, ensuring safety, will have their wheels pass over the curved surface of warning block 1. As the warning block 1 is compressed downwards by the compression spring damper 8, the vehicle can smoothly merge into the tidal flow lane. Conversely, the right-side warning system is aligned with the left. When a vehicle in the right lane attempts to merge into the tidal flow lane, it will trigger a mechanism that moves the linkage force transmission assembly 3, causing the sliding block 4 to move forward and lock the warning block 1, preventing it from moving downwards and the wheels from rolling forward. This prevents further violations, protects the lives of drivers, and reduces the accident rate.

[0055] If it is a change of tidal lane, open the cover 15 of the control device, insert the rotating handle 14 into the rotating shaft 12, and rotate it 180° clockwise. The rotating shaft 12 drives the cast iron 11 with fixed gear to rotate. At the same time, the chain 20 will also drive the various warning devices to rotate smoothly under the joint action of the auxiliary rotating device, so as to achieve the effect of changing with the change of tidal lane.

[0056] Reference Figures 9-10 A method for installing a warning device suitable for tidal lane changes includes the following steps:

[0057] Step 1: Fabricate individual precast concrete blocks 17 and precast concrete trenches 18: Precast concrete blocks 17 are manufactured at the precast component processing plant. The length of each precast concrete block 17 is A1 = 2-4m, width B1 = 40-45cm, and thickness H2 = 60-80cm. Five hollowed-out cylinders with a diameter D = 40-45cm and a depth H1 = 40-60cm are located in the center. A cube has dimensions A5 = 20-20cm. Precast concrete trenches 18 are manufactured at the precast component processing plant. The length of each precast concrete trench 18 is... The dimensions are: A = 2.2–4.4 m, B = 80–100 cm, and H = 80–100 cm; there are two excavated cuboids in the middle. The upper excavated cuboid has a length A1 = 2–4 m, a width B1 = 40–45 cm, and a thickness H2 = 60–80 cm; the lower excavated cuboid has a length A6 = 1.9–3.8 m, a width B4 = 25–30 cm, and a thickness H3 = 20–40 cm. After the individual precast concrete blocks 17 and individual precast concrete trenches 18 are fabricated, they are transported to the designated location for installation.

[0058] Step 2: Excavation and Cutting of Strip-Shaped Foundation Trench: First, measure and locate the strip-shaped foundation trench to be excavated between the double yellow dashed lines; the width of the strip-shaped foundation trench should be 10-20mm wider and the depth should be 10-20mm deeper than the precast concrete trench 18; then, use a cutting machine to cut the road surface to its full thickness, strictly controlling the depth during cutting to avoid damaging the base layer; after cutting, road surface fragments should be collected and properly disposed of, and random disposal is strictly prohibited; finally, compact the road base layer and spread dry-mixed mortar with a water-cement ratio of 0.2 as a leveling layer, with the spreading thickness controlled within 20mm;

[0059] Step 3: Assemble the warning system: Arrange five triggering devices, warning devices, an auxiliary rotating device, an overall rotating device, and a control device in the warning system of one unit;

[0060] Step 4: Install the double yellow dashed line warning system in place: According to the positioning line, vertically place the assembled double yellow dashed line warning system into the road surface strip groove;

[0061] Step 5: Filling the road surface gaps: After the unit double yellow dashed line warning system is installed, single-sized crushed stone of the same width as the gap is squeezed into the joint between the road surface and the precast concrete groove to improve the interlocking force between the road panels and enhance the load transfer performance.

[0062] In summary, this invention controls the reversal of each unit by rotating the ground rotation axis, achieving road control that changes with the tidal flow lane. It is applicable to various tidal phenomena, and its fixed position effectively guides vehicles to drive normally according to traffic signals.

[0063] The descriptions and practices disclosed in this invention are readily apparent and understandable to those skilled in the art, and various modifications and refinements can be made without departing from the principles of this invention. Therefore, any modifications or improvements made without departing from the spirit of this invention should also be considered within the scope of protection of this invention.

Claims

1. A warning device suitable for use in tidal lane shifting, characterized in that, The application relates to a traffic control device, which comprises a plurality of trigger devices arranged at the positions of double-yellow dashed lines on both sides of a lane, a control device arranged on one side of the plurality of trigger devices, an auxiliary rotating device for mounting the plurality of trigger devices, and an overall rotating device arranged below the plurality of trigger devices. The plurality of trigger devices are arranged in sequence and are spaced apart, and each trigger device is provided with a warning device on one side. The warning device comprises a warning block (1), a compression spring damper (8) arranged below the warning block (1), and a cast iron rod member (10) with a convex thread arranged below the compression spring damper (8), the bottom of the cast iron rod member (10) is provided with a cast iron member (11) with a fixed gear, the cast iron rod member (10) is connected with the cast iron member (11) with the fixed gear through threads, and the outer side of the cast iron rod member (10) is provided with a cast iron shell (9). Each trigger device comprises a trigger handle (2) mounted on the cast iron shell (9), a connecting rod force transmission assembly (3) arranged below the trigger handle (2), and a slidable clamping block (4) arranged on one side of the bottom of the connecting rod force transmission assembly (3), the slidable clamping block (4) can slide in a sliding groove (5) formed in the cast iron shell (9), and a tension spring (6) is arranged in the inner side of the sliding groove (5). The auxiliary rotating device comprises a prefabricated concrete groove (18) and prefabricated concrete blocks (17) arranged on the prefabricated concrete groove (18), the prefabricated concrete blocks (17) are provided with hollow cylinders for mounting the plurality of trigger devices, the inner wall of each hollow cylinder is provided with a roller set (16), and a hole for mounting the cast iron rod member (10) with a convex thread is reserved below each hollow cylinder. The control device comprises a cover plate (15), a bearing (13), a rotating shaft (12) sleeved with the bearing (13), the top of the rotating shaft (12) is provided with a rotating handle (14), the bottom of the rotating shaft (12) is provided with the cast iron rod member (10) with a convex thread, and the cast iron rod member (10) with a convex thread is connected with the cast iron member (11) with a fixed gear through threads below the cast iron rod member (10) with a convex thread. The overall rotating device comprises a plurality of ground shafts (19) arranged in the prefabricated concrete groove (18) and a chain (20) arranged above the plurality of ground shafts (19), the chain (20) is horizontally arranged, the plurality of ground shafts (19) are arranged in sequence and are spaced apart, and a hemisphere for mounting the cast iron member (11) with a fixed gear is formed in each ground shaft (19), and the inner wall of the hemisphere is provided with the roller set (16). The top of the warning block (1) is a curved surface, the side of the warning block (1) close to the trigger device is a vertical surface, and the vertical surface is provided with an extension space (101) for sliding of the slidable clamping block (4).

2. A warning device for tidal lane shifting according to claim 1, characterized in that The connecting rod force transmission assembly (3) comprises a first connecting rod (301), a second connecting rod (302) and a third connecting rod (303), one end of the first connecting rod (301) is provided with a first hinge (304), the other end of the first connecting rod (301) is connected with one end of the second connecting rod (302) and the third connecting rod (303) through a second hinge (305) respectively, and the other end of the second connecting rod (302) and the third connecting rod (303) is respectively provided with a third hinge (306) and a fourth hinge (307).

3. A warning device for tidal lane shifting according to claim 1, characterized in that The upper part of the fixed gear cast iron (11) is provided with a concave thread groove, and the lower end of the fixed gear cast iron (11) is provided with a round head for rolling.

4. The method of claim 1, wherein the warning device is adapted for use in a tidal lane shift. It comprises the following steps: Step one, making single prefabricated concrete block (17) and prefabricated concrete groove (18) component: prefabricated concrete block (17) in prefabricated component processing plant, single prefabricated concrete block (17) length A1=2~4m, width B1=40~45cm, thickness H2=60~80cm; There are five hollow cylinders with diameter D=40~45cm and depth H1=40~60cm, and a cube with length width height A5=20-20cm; The prefabricated concrete groove (18) is prefabricated in the prefabricated component processing plant, the length of the single prefabricated concrete groove (18) is A=2.2~4.4m, the width is B=80~100cm, and the thickness is H=80~100cm; There are two lower excavated cuboids and upper hollow cuboids with length A1=2~4m, width B1=40~45cm and thickness H2=60~80cm; The lower hollow cuboid has a length of A6=1.9~3.8m, a width of B4=25~30cm and a thickness of H3=20~40cm; After the single prefabricated concrete block (17) and the single prefabricated concrete groove (18) are made, they are transported to the designated place for installation and construction; Step two, excavate and cut the road surface strip-shaped base trench: first, measure and position the strip-shaped base trench to be excavated between the double yellow dashed lines; The width of the strip-shaped base trench should be 10~20mm wider than the prefabricated concrete groove (18), and the depth should be 10~20mm deeper than the prefabricated concrete groove (18); Then use the cutting machine to cut the road surface to full thickness, and strictly control the depth during cutting to avoid damaging the base layer; After cutting, the on-site road surface fragments should be collected and properly disposed of, and random disposal is strictly prohibited; Finally, the road surface base is rolled and compacted, and dry-mixed mortar with water-cement ratio of 0.2 is spread as leveling layer, and the spreading thickness is controlled within 20mm; Step three, assemble the warning system: one unit of the warning system is arranged with five trigger devices, warning devices, and one auxiliary rotating device, overall rotating device and control device; Step four, hoist and position the double yellow dashed line warning system: according to the positioning line, the assembled double yellow dashed line warning system is vertically placed in the road surface strip-shaped base trench; Step five, road surface gap filling: after the installation of the unit double yellow dashed line warning system, single grain gravel with the same width as the gap is embedded in the joint between the road surface and the concrete prefabricated groove to improve the interlocking force between the road surface panels and enhance the load transfer performance.

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