An elastic traffic control system applicable to underground garages

Abstract

The present invention relates to an elastic traffic control system applicable to an underground garage, comprising: a first lane control unit, a second lane control unit and a third lane control unit for controlling whether lane communication is enabled or not. The first lane control unit is provided at the connection of the entrance and exit ramp and the internal road. The second lane control unit is provided at the connection of the entrance and exit ramp and the external lane of the garage, and is only provided in the original entrance direction. The third lane control unit is provided on the internal road of the garage, and is only provided in the original exit direction. The first lane control unit is a two-way gate. Compared with the prior art, by setting the first lane control unit, the second lane control unit and the third lane control unit, and arranging the gate inside the entrance and exit ramp, the present invention can effectively solve the tidal congestion phenomenon in the garage while not changing the external traffic organization and road functions of the garage.

Description

Technical Field

[0001] The present invention relates to an elastic traffic control system applicable to underground garages, and more particularly to an elastic traffic control system applicable to underground garages. Background Art

[0002] With the rapid increase in the number of automobiles in China, the demand for parking resources is also continuously rising. However, the growth rate of parking resources including underground garages, open-air garages, and roadside parking spaces far lags behind the growth rate of motor vehicle demand. The utilization of existing parking resources has not reached the optimal level, making parking congestion gradually become a common problem.

[0003] Tidality is a prominent feature of the traffic in and out of parking lots. Many reasons such as morning and evening rush hours, holidays, and gatherings can cause tidal phenomena in parking lots, resulting in the problem of blockages at the entrances and exits with different traffic flows. This seriously reduces the service efficiency of parking lots and affects the travel experience of car owners. Therefore, solving the tidal traffic problem in parking lots helps to relieve the congestion in parking lots during tidal periods and greatly improves the utilization rate of parking resources.

[0004] The existing elastic traffic system technologies mainly focus on the field of road traffic lane switching and control, lacking research on the underground garage scenario. The relevant document CN206370157U is directed at road intersections. By using microwave detectors installed upstream of the two-way entrances of variable lanes to detect the traffic flow, the road resources are timely regulated, obstacles are reduced, and at the same time, the conflict of oncoming traffic is avoided. However, the installation of the detectors in this system does not meet the requirements of the underground garage scenario and is not applicable to the target scenario. The relevant document CN114241768A provides an adaptive adjustment strategy for automatically adjusting lanes based on traffic flow demand. The unit time lane of each virtual single attribute is calculated according to the lane attributes and lane flows of each lane, and the switching threshold is quantified into the average flow of the lane. This strategy is for the adjustment and combination of multi-lane flow strategies and is not applicable to the target scenario. The relevant document CN212460812U sets garage identification markings to form variable lanes, and through a lane diversion information indicating device and a voice diversion guiding device, the entrance indication and guidance are carried out, so as to realize the efficient and flexible allocation of in-out lane resources based on the tidal phenomenon in the garage. However, when this system changes the traffic flow direction of the underground garage lanes, no physical isolation measures are taken, and there is a potential safety hazard of oncoming vehicle collisions. Summary of the Invention

[0005] The purpose of the present invention is to provide an elastic traffic control system applicable to underground garages. By setting a first lane control unit, a second lane control unit, and a third lane control unit, and setting the barrier inside the entrance and exit ramps, it is possible to effectively solve the tidal congestion phenomenon in the garage while not changing the external traffic organization and road functions of the garage.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] An elastic traffic control system applicable to an underground garage, comprising:

[0008] A first lane control unit, a second lane control unit, and a third lane control unit for controlling whether communication in the lane is allowed. The first lane control unit is provided at the connection of the entrance and exit ramp and the internal road. The second lane control unit is provided at the connection of the entrance and exit ramp and the external lane of the garage, and is only provided in the original entrance direction. The third lane control unit is provided on the internal road of the garage, and is only provided in the original exit direction. The first lane control unit is a two-way gate;

[0009] A vehicle detection unit for collecting vehicle information;

[0010] A control device, respectively connected to the vehicle detection unit and all lane control units, and configured to perform the following steps:

[0011] Step A1: Receive the traffic flow data collected by the vehicle detection unit;

[0012] Step A2: Judge whether the incoming vehicle flow exceeds a pre-configured first threshold and whether the outgoing vehicle flow is lower than a pre-configured second threshold. If so, execute Step S4:

[0013] Step A3: Judge whether the incoming vehicle flow is lower than a pre-configured third threshold and whether the outgoing vehicle flow exceeds a pre-configured fourth threshold. If so, execute Step S5:

[0014] Step A4: Close the third lane control unit and open the second lane control unit;

[0015] Step A5: Close the second lane control unit and open the third lane control unit.

[0016] When the entrance and exit ramp and the internal road form a T-junction, the first lane control unit is provided at the connections of the entrance and exit ramp with the internal roads on both sides.

[0017] Both the second lane control unit and the third lane control unit are variable speed bumps.

[0018] The system further includes an induction sign control unit, which is connected to the vehicle detection unit and is respectively provided at each lane control unit.

[0019] The induction sign control unit adopts an LED full-color dot matrix screen and is set in all hanging sign areas affected within the scope of elastic traffic organization.

[0020] The system further includes a ground marking control unit, which is connected to the vehicle detection unit.

[0021] The ground marking control unit activates a light projector or ground luminous markings, which are set in all ground areas affected by the elastic traffic organization change.

[0022] The vehicle detection unit uses a video camera or a millimeter-wave radar, which is set at the approach end and the departure end areas of each entrance and exit ramp in the underground garage, covering all lanes at both ends.

[0023] One or more ground marking control units are provided on the entrance and exit ramps.

[0024] The first threshold, the second threshold, the third threshold and the fourth threshold are determined according to the number of parking spaces in the garage.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By setting the first lane control unit, the second lane control unit and the third lane control unit, and setting the barrier gate inside the entrance and exit ramp, it is possible to effectively solve the problem of tidal congestion in the garage while not changing the external traffic organization and road functions of the garage.

[0027] 2. For the T-shaped intersection, the first lane control unit is added, which can improve the traffic efficiency.

[0028] 3. Both the second lane control unit and the third lane control unit are variable speed bumps, which are convenient for switching states.

[0029] 4. Detect the two-way traffic flow at each entrance and exit of the underground garage, generate an elastic traffic organization plan in real time according to the internal and external tidal traffic characteristics, and realize the "double-in" and "double-out" traffic organization modes at the entrance and exit of the underground garage through the lane control unit, the ground marking control unit and the guiding sign control unit, optimize the utilization rate of parking resources, improve the service efficiency of the parking lot, and effectively relieve the traffic jam problem caused by tidal traffic.

[0030] 5. Take double linkage induction measures of ground luminous markings and guiding signs. The information release process is continuous, the information expression is clear and complete, and it is convenient for the car owners to understand.

[0031] 6. Set a lane control unit to realize physical isolation of lanes, prevent traffic accidents caused by incorrect operations of car owners, and have strong safety. Description of the Drawings

[0032] Figure 1 It is a functional schematic diagram of the elastic traffic control system of the underground garage during the off-peak period in the embodiment;

[0033] Figure 2 Schematic diagram of the function of the elastic traffic control system in the underground garage during the peak inbound period in the embodiment;

[0034] Figure 3 Schematic diagram of the function of the elastic traffic control system in the underground garage during the peak outbound period in the embodiment;

[0035] Figure 4 System structure diagram of the present invention;

[0036] Wherein: 1. Underground garage, 2. Parking space, 3. Ground marking control unit, 4. Vehicle detection unit, 5. First lane control unit, 6. Induction sign control unit, 7. Vehicle detection unit, 8. Second lane control unit, 9. Induction sign control unit, 10. Ground marking control unit, 11. Induction sign control unit, 12. First lane control unit, 13. Vehicle detection unit, 14. Ground marking control unit, 15. Vehicle detection unit, 16. Third lane control unit, 17. Induction sign control unit, 18. Ground marking control unit, 19. First lane control unit, 20. Induction sign control unit, 21. Ground marking control unit, 22. Induction sign control unit, 23. Ground marking control unit, 24. Induction sign control unit, 25. Second lane control unit, 26. Vehicle detection unit, 27. Inlet and outlet ramp, 28. Inlet and outlet ramp, 29. Data transmission unit, 30. Integrated control platform. Specific implementation manner

[0037] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0038] An elastic traffic control system applicable to an underground garage, as Figure 1 shown, includes:

[0039] The first lane control unit, the second lane control unit and the third lane control unit for controlling whether the lane communicates or not. The first lane control unit is arranged at the connection of the inlet and outlet ramp and the internal road. The second lane control unit is arranged at the connection of the inlet and outlet ramp and the external lane of the garage, and is only arranged in the original entrance direction. The third lane control unit is arranged on the internal road of the garage, and is only arranged in the original exit direction. The first lane control unit is a two-way gate;

[0040] A vehicle detection unit for collecting vehicle information;

[0041] A control device, respectively connected to the vehicle detection unit and all lane control units, and configured to perform the following steps:

[0042] Step A1: Receive the traffic flow data collected by the vehicle detection unit;

[0043] Step A2: Determine whether the inbound traffic flow exceeds a pre-configured first threshold and whether the outbound traffic flow is lower than a pre-configured second threshold. If so, execute Step S4:

[0044] Step A3: Determine whether the inbound traffic flow is lower than a pre-configured third threshold and whether the outbound traffic flow exceeds a pre-configured fourth threshold. If so, execute Step S5:

[0045] Step A4: Turn off the third lane control unit and turn on the second lane control unit;

[0046] Step A5: Turn off the second lane control unit and turn on the third lane control unit.

[0047] By setting the first lane control unit, the second lane control unit, and the third lane control unit, and setting the gate inside the entrance and exit ramps, it is possible to effectively solve the tidal congestion phenomenon in the garage while not changing the external traffic organization and road functions of the garage.

[0048] Moreover, as an integrated control platform, the control device can communicate data with other parts through the data transmission unit.

[0049] In addition, when the entrance and exit ramps and the internal road form a T-junction, for example Figure 1 the entrance and exit ramp 28 in, both connections of the entrance and exit ramp 28 with the internal roads on both sides are provided with a first lane control unit, namely the first lane control unit 5 and the first lane control unit 12 respectively. For the T-shaped intersection, a first lane control unit is added, thereby improving the traffic efficiency.

[0050] In addition, in this embodiment, both the second lane control unit and the third lane control unit are variable speed bumps, such as liftable speed bumps. Of course, in other embodiments, they can also be cone barrels or other devices.

[0051] The system further includes an induction sign control unit. The induction sign control unit is connected to the vehicle detection unit and is respectively arranged at each lane control unit. The induction sign control unit adopts an LED full-color dot matrix screen and is set in all hanging sign areas affected within the elastic traffic organization range.

[0052] The system further includes a ground marking control unit. The ground marking control unit is connected to the vehicle detection unit and uses the ground marking control unit as a light projector or ground luminous marking, and is set in all ground areas affected by the change of elastic traffic organization.

[0053] The vehicle detection unit uses a video camera or a millimeter-wave radar and is set at the approach end and the departure end areas of each entrance and exit ramp in the underground garage, covering all lanes at both ends.

[0054] One or more ground marking control units are provided on the entrance and exit ramps, specifically determined according to the length of the ramp.

[0055] The first threshold, the second threshold, the third threshold, and the fourth threshold are determined according to the number of parking spaces in the garage.

[0056] The following is an illustration with a specific application scenario. For a certain underground garage, when applying the solution of this application, some renovations are required to obtain the structure as Figure 1 shown. Among them, the vehicle detection unit is set in two designated areas at each entrance and exit ramp of the underground garage, used to detect the inbound and outbound flow sizes within a period of time for a single entrance and exit. The detection data is used for the switching of the elastic traffic organization plan and the decision-making of the control unit actions; the three types of lane control units are respectively set at the designated positions, mainly used to cooperate with the elastic traffic organization plan, control the inbound and outbound lane flows, physically isolate possible conflict points, and reduce potential safety hazards; the ground marking control unit is set in the ground area affected by the change of the elastic traffic organization, used to control and display the content of the variable marking lines in the designated ground area; the guiding sign control unit is set in the area within the scope of the elastic traffic organization, used to control the real-time switching and display content of the guiding signs in the underground garage; the data transmission unit adopts wired or wireless communication, used for the real-time data transmission between the system units; the integrated control platform receives the traffic flow data in the detection area of the entrance and exit ramps, generates the overall control plan, completes the decision-making of each control unit and issues instructions, and receives the return data to update the elastic traffic organization plan in real time.

[0057] Specifically, as Figure 1 shown, it is a functional schematic diagram of the elastic traffic control system for a double-entrance and -exit underground garage during the off-peak period.

[0058] In the figure, 1 is an underground garage with two ramp entrances and exits, 2 is a schematic diagram of a certain number of parking spaces in the garage, 27 and 28 are the two-lane entrance and exit ramps, and the traffic organization method during the off-peak period is one-way in and one-way out.

[0059] In the figure, 4, 7, 13, 15, and 26 are vehicle detection units, all of which use DH-IPC-HFW8249K-ZRL-LED bullet cameras and are respectively installed at the entrance and exit of the two entrance and exit ramps, used to detect the real-time inbound and outbound flows of each entrance and exit.

[0060] The first lane control units 5, 12, and 19, the second lane control units 8 and 25, and the third lane control unit 16 can control the opening or prohibition of passage of the lanes at this location, and are used to coordinate the flexible traffic organization plan to avoid the generation of conflict points under different flexible traffic organization plans.

[0061] 3, 10, 14, 18, 21, and 23 are ground marking control units, all of which use Diheng MS770 laser projectors and auxiliary equipment. They are installed above the lanes and project marking lines onto the ground through laser projection. According to different flexible traffic organization plans, the content of the ground projection marking lines is adjusted, such as straight-left markings, straight markings, left-turn markings, and fish-belly lines. During off-peak hours, the ground marking control units project direction arrow markings as shown. Figure 1 as shown.

[0062] 6, 9, 11, 17, 20, 22, and 24 are induction sign control units, which are installed by hanging full-color LED dot matrix screens. According to different flexible traffic organization plans, the display content of the hanging LED induction screens is adjusted, and the display content is consistent with the information displayed by the ground marking control units.

[0063] The data transmission unit 29 uses 5G wireless communication. 5G signal base stations and auxiliary router equipment are installed to cover the ground and underground areas of the basement to achieve two-way data transmission between the integrated control platform and other units. 30 is the integrated control platform, which uses a Huawei industrial computer and auxiliary equipment, and is equipped with self-developed control algorithm software to generate an overall control plan, complete the decision-making and instruction issuance of each control unit, and receive the returned data to update the flexible traffic organization plan in real time.

[0064] The embodiments of this application mainly include three flexible traffic control system plans during off-peak hours, peak inbound hours, and peak outbound hours. The logic and functional steps for the system to control the switching of each plan are described in detail as follows:

[0065] (1) When the inbound traffic surges and the outbound traffic drops to the threshold, it is determined that the underground garage is in the tidal peak inbound hour, and the system switches to the state where both lanes at each entrance and exit are inbound ("double-in") during peak inbound hours. The states of each part of the system and the traffic organization form are as shown. Figure 2 as shown.

[0066] The specific steps to complete the conversion from off-peak hours - peak inbound hours - off-peak hours using the system of the present invention are as follows:

[0067] S1: The vehicle detection units 7 and 26 detect the inbound traffic at the entrance and exit ramps, and the vehicle detection units 4, 13, and 15 detect the outbound traffic at the entrance and exit ramps. When the inbound vehicle flow is greater than the threshold C0 and the outbound vehicle flow is less than the threshold L1, the system starts to convert to the peak inbound state.

[0068] S2: The lane control units 5, 12, and 16 control the lanes in the off-peak departure direction to prohibit passage. The guiding sign control units 6, 11, and 17 synchronously display the no-departure mark, and the vehicles in the off-peak departure direction queue up behind the lane control units 5, 12, and 16. The system maintains the current state and waits for the vehicles in ramps 27 and 28 to clear, with a waiting time of t0.

[0069] S3: After the vehicles in the ramps clear, the lane control unit 19 changes to two-way approach open, and the gate lifts when an approaching vehicle is detected. The ground marking control units 10 and 23 project fish-belly lines onto the lanes in the off-peak departure direction, and the approach lanes remain unchanged; 3, 14, 18, and 21 project the ground markings of the lanes in the off-peak departure direction as approach markings. The guiding sign control units 20 and 22 change the guiding signs above the lanes in the off-peak departure direction to approach guiding signs.

[0070] S4: The conversion of the flexible traffic system from the off-peak period to the approach peak period is completed. At this time, external vehicles enter the parking lot after entering through a single lane and merge into two lanes behind the fish-belly line in the ramp. Without changing the external traffic organization and road functions, the internal service efficiency of the parking lot is improved.

[0071] S5: The vehicle detection units 7 and 26 detect the approach traffic volume at the entrance and exit ramps, and the vehicle detection units 4, 13, and 15 detect the departure traffic volume at the entrance and exit ramps. When the approaching vehicle volume is less than the threshold C0, or the departure vehicle volume is greater than the threshold L1, the system starts to convert to the off-peak state.

[0072] S6: The lane control unit 19 changes to a one-in-one-out gate lift during the off-peak period. The ground marking control units 10 and 23 change to one-in-one-out lane projections during the off-peak period; 3, 14, 18, and 21 change to one-in-one-out lane projections during the off-peak period. The guiding sign control units 20 and 22 change to one-in-one-out lane projections during the off-peak period. The system maintains the current state and waits for the vehicles in ramps 27 and 28 to clear, with a waiting time of t0.

[0073] S7: After the vehicles in the ramps clear, the lane control units 5, 12, and 16 control the lanes in both the approach and departure directions to open simultaneously. The guiding sign control units 6, 13, and 17 synchronously display the two-way open information, and the queuing vehicles in the departure direction can leave normally after the lane control units open.

[0074] S8: The conversion of the flexible traffic system from the approach peak period to the off-peak period is completed. At this time, the approach and departure traffic volumes no longer show obvious tidal characteristics, and the underground garage resumes normal traffic organization.

[0075] (2) When the departure flow surges and the approach flow drops to the threshold, it is determined that the underground garage is in the tidal departure peak period, and the system switches to the state of two-way departure ("double exit") at each entrance and exit during the departure peak period. The states of all parts of the system and the traffic organization form are asFigure 3 as shown

[0076] The specific steps to complete the conversion from the off-peak period - departure peak period - off-peak period using the system of the present invention are as follows:

[0077] S1: The vehicle detection units 7 and 26 detect the inbound traffic volume of the entrance and exit ramps, and the vehicle detection units 4, 13, and 15 detect the outbound traffic volume of the entrance and exit ramps. When the outbound vehicle flow is greater than the threshold L0 and the inbound vehicle flow is less than the threshold C1, the system starts to switch to the departure peak state.

[0078] S2: The lane control units 8 and 25 control the inbound lanes in the off-peak direction to prohibit traffic. The induction sign control units 9 and 24 synchronously display the no-entry mark, and the vehicles in the inbound direction queue up behind the lane control units 8 and 25. The system maintains the current state and waits for the vehicles in the ramps 27 and 28 to clear, with a waiting time of t0.

[0079] S3: After the vehicles in the ramps are cleared, the lane control unit 19 changes to two-way departure opening, and the gate lifts when an outbound vehicle is detected. The ground marking control units 10 and 23 project fish-belly lines onto the inbound lanes in the off-peak direction, and the outbound lanes remain unchanged; 3, 14, 18, and 21 project the ground markings of the inbound lanes in the off-peak direction as inbound markings. The induction sign control units 20 and 22 change the induction signs above the inbound lanes in the off-peak direction to departure induction signs.

[0080] S4: The conversion of the elastic traffic system from the off-peak period to the departure peak period is completed. At this time, the vehicles inside the underground garage drive into the ramp entrances and exits via the double lanes and merge into the single lane for departure after the fish-belly lines in the ramps, improving the internal service efficiency of the parking lot without changing the external traffic organization and road functions.

[0081] S5: The vehicle detection units 7 and 26 detect the inbound traffic volume of the entrance and exit ramps, and the vehicle detection units 4, 13, and 15 detect the outbound traffic volume of the entrance and exit ramps. When the outbound vehicle flow is less than the threshold L0 or the inbound vehicle flow is greater than the threshold C1, the system starts to switch to the off-peak state.

[0082] S6: The lane control unit 19 changes to a one-in-one-out gate lift during the off-peak period. The ground marking control units 10 and 23 change to one-in-one-out lane projections during the off-peak period; 3, 14, 18, and 21 change to one-in-one-out lane projections during the off-peak period. The induction sign control units 20 and 22 change to one-in-one-out lane projections during the off-peak period. The system maintains the current state and waits for the vehicles in the ramps 27 and 28 to clear, with a waiting time of t0.

[0083] S7: After the ramp vehicle is emptied, the lane control units 8 and 25 control the simultaneous opening of the lanes in the approach direction. The guiding sign control units 9 and 24 synchronously display the approach opening information, and the queuing vehicles in the approach direction can enter the site normally after the lanes are opened by the lane control units.

[0084] S8: The conversion of the flexible traffic system is completed from the peak departure period to the off-peak period. At this time, the inbound and outbound traffic flows no longer show obvious tidal characteristics, and the normal traffic organization of the underground garage is restored.

[0085] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

Claims

1. An elastic traffic control system applicable to underground garages, characterized in that, it includes: A first lane control unit, a second lane control unit, and a third lane control unit for controlling whether lane communication is allowed. The first lane control unit is provided at the connection of the entrance and exit ramp and the internal road. The second lane control unit is provided at the connection of the entrance and exit ramp and the external lane of the garage, and is only provided in the original entrance direction. The third lane control unit is provided on the internal road of the garage, and is only provided in the original exit direction. The first lane control unit is a two-way gate; A vehicle detection unit for collecting vehicle information; A control device, respectively connected to the vehicle detection unit and all lane control units, and configured to perform the following steps: Step A1: Receive the traffic flow data collected by the vehicle detection unit; Step A2: Determine whether the incoming vehicle flow exceeds a pre-configured first threshold and whether the outgoing vehicle flow is lower than a pre-configured second threshold. If so, execute Step A4: Step A3: Determine whether the incoming vehicle flow is lower than a pre-configured third threshold and whether the outgoing vehicle flow exceeds a pre-configured fourth threshold. If so, execute Step A5: Step A4: Close the third lane control unit and open the second lane control unit; Step A5: Close the second lane control unit and open the third lane control unit.

2. The elastic traffic control system applicable to underground garages according to claim 1, characterized in that, When the entrance and exit ramp and the internal road form a T-junction, the first lane control unit is provided at the connection of the entrance and exit ramp and both sides of the internal road.

3. The elastic traffic control system applicable to underground garages according to claim 1, characterized in that, Both the second lane control unit and the third lane control unit are variable speed bumps.

4. The elastic traffic control system applicable to underground garages according to claim 1, characterized in that, The system further includes an induction sign control unit, which is connected to the vehicle detection unit and is respectively provided at each lane control unit.

5. The elastic traffic control system applicable to underground garages according to claim 4, characterized in that, The induction sign control unit adopts an LED full-color dot matrix screen and is set in all hanging sign areas affected within the scope of elastic traffic organization.

6. The elastic traffic control system applicable to underground garages according to claim 1, characterized in that, The system further includes a ground marking control unit, which is connected to the vehicle detection unit.

7. The elastic traffic control system applicable to underground garages according to claim 6, characterized in that, The ground marking control unit is a laser projector or a ground luminous marking, and is set in all ground areas affected by the change of elastic traffic organization.

8. The elastic traffic control system applicable to underground garages according to claim 1, characterized in that, The vehicle detection unit adopts a video camera or a millimeter-wave radar, and is set in the approach end and departure end areas of each entrance and exit ramp of the underground garage, covering all lanes at both ends.

9. An elastic traffic control system applicable to an underground garage according to claim 6, characterized in that, one or more ground marking control units are provided on the access ramp.

10. An elastic traffic control system applicable to an underground garage according to claim 1, characterized in that, the first threshold, the second threshold, the third threshold and the fourth threshold are determined according to the number of parking spaces in the garage.

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