National Technical Regulation QCVN 116:2024/BGTVT for Weigh Station on Road

QCVN 116:2024/BGTVT

NATIONAL TECHNICAL REGULATION FOR WEIGH STATION ON ROAD

National technical regulation for Weigh Station on Road

Introduction

QCVN 116:2024/BGTVT is written by the Department for Roads of Vietnam, requested by the Department of Science, Technology and Environment, approved by the Ministry of Science and Technology, and issued by the Minister of Transport under Circular No. 56/2024/TT-BGTVT dated November 15, 2024.

QCVN 116:2024/BGTVT replaces QCVN 66:2024/BGTVT  on National technical regulation for Weigh Station on Road  issued together  with Circular No. 28/2024/TT-BGTVT dated July 23, 2024 of Minister of Transport;

ANNEX

1. General provisions

1.1. Scope  

1.2. Regulated entities  

1.3. Interpretation of terms

1.4. Abbreviations

2. 2. Technical regulation

2.1. Reference

2.2. Minimum required work items of weigh stations on road

2.3. Design requirements for weigh stations on road  

2.4. Requirements for technical procedure design of weigh stations on road  

2.5. Requirements for infrastructure structures of weigh stations on road  

2.6. Requirements for design and placement of road signs at weigh stations on road

2.7. Requirements for main equipment system of weigh stations on road

2.8. Requirements for other equipment systems of weigh stations on road

2.9. Requirements for weighing data

3. Regulations on management

4. Responsibilities of organizations and individuals

5. V. Implementation

APPENDIX A - Illustrative diagrams of weigh stations on road

NATIONAL TECHNICAL REGULATION FOR WEIGH STATION ON ROAD

National technical regulation for Weigh Station on Road

1. General provisions

1.1. Scope

This Regulation specifies technical requirements on design, infrastructure structure, equipment system, and collected data of weigh stations on road.

1.2. Regulated entities

This Regulation applies to organizations and individuals involved in the investment, construction, upgrade, renovation, management, operation, exploitation, maintenance, and evaluation of the suitability of weigh stations on road.

1.3. Interpretation of terms

In this Regulation, terms below are construed as follows:

1.3.1. Weigh station on road (hereinafter referred to as “weigh station”): refers to a structure which is constructed and  installed an in-ground mounted dynamic weighing system to automatically and accurately measure axle load, total weight of vehicles participating in road traffic in order to collect, analyze, and evaluate the impact of axle load, total weight of vehicles on the safety of the structure, road traffic safety; detect and handle violations in accordance with the law;

1.3.2. Dynamic weighing system refers to  a weigh-in-motion system to automatically and accurately measure axle load, total weight of vehicles participating in road traffic;

1.3.3. Zero chain age point of weigh station on road (hereinafter referred to as “zero chain age point”)   refers to the starting point from which the area where the weigh station is constructed and installed according to the chain age;

1.3.4. Weighbridge  refers to an area consisting of a load cell (where the weighing equipment is installed) and ramps on both sides of the load cell;

1.3.5. Data collected from weigh stations (hereinafter referred to as “weighing data”): includes the name of the weigh station, chain age, lane, vehicle speed and time passed through the weighbridge, information of vehicle owners, license plate number, images of the license plate, weight of each axle, axle group, total weight of the vehicle, vehicle type, total number of axles, axle structure, axle distance, curb weight of vehicle, semitrailer, or trailer, maximum trailer weight allowed, maximum permissible cargo weight for the vehicle, semitrailer, or trailer, maximum passenger weight allowed of vehicle, comparison results of axle load, total weight of the vehicle with regulations on load, and other necessary information;

1.3.6. Information technology system of weigh stations: includes a license plate recognition camera system, weighing data processing software, communication systems to transmit data, computer system, server, and other supporting software and devices.

1.4. Abbreviations

2. Technical regulation

2.1. Reference

2.2. Minimum required work items of weigh stations

2.2.1. Dynamic weighing system:

2.2.2. Camera system for  license plate recognition (front plate, rear plate), lane monitoring (front image capture, rear image capture, and panoramic image capture of the vehicle, road traffic violation detection) and overall monitoring (security, order, and traffic monitoring of the weighing area)

2.2.3. Weighing data processing software and license plate recognition software

2.2.4. Server and storage system.

2.2.5. Road sign system.

2.2.6. Power supply system (including backup power supply system).

2.2.7. Data transmission system.

2.2.8. Lightning protection system.

2.2.9. Grounding systems

2.2.10. Technical room or technical cabinet containing equipment.

2.3. Design requirements for construction of weigh station

2.3.1. Weigh stations must be arranged in accordance with the actual terrain and traffic conditions on roads, expressways, traffic gateways, focal goods sources, tollbooths, slip roads connecting to expressways, and position before entering expressways where vehicles must be weighted in accordance with actual traffic conditions.

2.3.2. Designs must include solutions to prevent overloaded vehicles from entering expressways (such as arranging exits for violating vehicles, setting up surveillance camera systems); to control traffic on roads and to prevent vehicles from avoiding vehicle weight.

2.3.3. Designs must include solutions to ensure traffic safety and maintain distance between vehicles, ensure that each vehicle pass through the weighbridge sequentially, and prevent any obstruction of license plates or errors in weighing results.

2.3.4. Automatic weighing instruments can automatically check the operational status of each weighing sensor and detect the malfunctioning weighing sensor (if any).

2.3.5. Weighing data processing software must include functions for data creation, transmission, and automatic storage via the software of weighing instruments and camera system.

2.3.6. Weighing stations located in tollbooth areas or areas with invested infrastructure systems and equipment (concrete roads, camera systems, RFID automobiled readers, signage, gantries, auxiliary equipment) must be designed to maximize the shared use of existing infrastructure systems and equipment.

2.3.7. Illustrative diagrams of weighing stations in Appendix A of this Regulation.

2.4. Requirements for technical procedure design of construction of weigh station

2.4.1. Road signs must be installed before and within the weighbridge to ensure appropriate vehicle speed, safe distance between vehicles, and lane changing in accordance with road signs and markings; and to prohibit unauthorized stopping and parking.

2.4.2. Dynamic weighing system must be installed within the weighbridge to automatically measure the weight of each wheel axle, recognize vehicle license plates, determine technical specifications of vehicles (such as vehicle type, total number of axles, axle structure, axle spacing, vehicle curb weight (including automobiles, semi-trailers, trailers), maximum passenger weight allowed, maximum trailer weight allowed, and maximum permissible cargo weight allowed), record any signs of traffic violations, store and transmit data to the weighing data processing software.

2.4.3. VMS, cameras, warning systems including red rotating lights and alarms, directional arrow signs and weight station staff (if any) shall be arranged after the weighbridge to guide vehicles to follow traffic flow or to request, monitor lane movement out of the expressway or into the processing area (if any) if they are overloaded.

2.4.4. The detection, collection of images, and data as a basis for handling situations must be ensured when vehicle operators fail to comply with vehicle weigh control. To be specific:

2.4.4.1. Cover the license plate so that the license plate detector cannot read the license plate number;

2.4.4.2. Cover, dirty, or obscure part of the license plate or take other actions resulting in incorrect recognition.

2.4.4.3. Drive out of the lane or drive at a speed faster or slower than the speed specified at the weighing station;

2.4.4.4. Fail to maintain the required distance leading to failure in license plate recognition or inaccurate weighing results.

2.5. Requirements for infrastructure structures of construction of weigh station

2.5.1. Weighbridge has a length of ≥ 65 meters, including the area for installing weighing equipment with a length of ≥ 5 meters, a pre-installation area with a length of ≥ 35 meters, and a post-installation area with a length of ≥ 25 meters.

2.5.2. Weighbridge surface is made of concrete, meeting the quality requirements for strength, roughness, and flatness; flat surface (including load cell) must ensure a maximum deviation of ≤ 10 mm (as specified in DLVN 225:2015), meeting the requirements for stable, accurate, and durable operation of the weighing equipment; areas installed with weighing sensors and surrounding areas must have higher load-bearing capacity than normal. The design load used to calculate the thickness of the concrete road surface structure must be based on the forecasted level of overload on the road with a very heavy traffic scale. Weighbridge surface may be made of asphalt concrete if it meets the requirements and technical guidelines provided by the manufacturer, ensuring load-bearing capacity and stable, accurate, and sustainable operation of the weighing equipment.

2.5.3. Road section in the area for installing weighing equipment must have a longitudinal slope of ≤ 1%; road sections in pre-installation area and post- installation area must have a longitudinal slope of ≤ 2%, a transverse slope of ≤ 3%, and a radius of curvature > 1,000 meters.

2.5.4. Transition areas from the asphalt road surface to the concrete road surface must be constructed ≥ 5 m before and after the weighbridge to limit uneven settlement, which could affect the alignment or deformation of the areas equipped with weighing equipment.

2.5.5. Weighbridge must meet requirements for drainage to prevent water logging during rain and localized flooding; ensure the accurate operation of the weighing equipment and and enhance the effectiveness of the traffic safety system.

2.5.6. Road median:

2.5.6.1. Road median which separates lanes designated for automobiles at weighbridge is marked by solid painted lines (combined with reflective studs) or flexible reflective delineators or median barriers to guide and mandate proper lane usage and ensure safety;

2.5.6.2. Road median which separates lanes designated for automobiles and lanes designated for motorcycles and bicycles is made using steel beam guardrails with flexible posts or solid painted lines (combined with reflective studs) or appropriate solutions to guide and enforce proper lane usage, ensure traffic safety, prevent collisions on both sides to minimize danger to road users;

2.5.6.3. On the lane designated for motorcycles and bicycles (if any), height restriction barriers are installed to prevent various types of automobiles from entering.

2.5.7. Gantry:

2.5.7.1. Gantry No. 1: positioned in front and at least 50 m away from gantry No. 2, equipped with lane separation signs, vehicle type signs, minimum distance between vehicles, no parking and no stopping signs, maximum speed, minimum speed allowed for vehicles passing through the weighbridge;

2.5.7.2. Gantry No. 2: positioned at least 15 m away from the starting point of the weighing equipment installation area, equipped with signs indicating minimum distance between vehicles, maximum speed, minimum speed allowed, no parking and no stopping signs, flashing yellow lights, rear license plate reading camera, lane monitoring camera, and lighting;

2.5.7.3. Gantry No. 3: positioned at least 15 m away from the end point of the weighing equipment installation area, equipped with front license plate reading camera, lane monitoring camera, panoramic surveillance camera (including monitoring traffic sign compliance upon receiving an overloaded warning) and lighting;

2.5.7.4. Gantries must be designed suitable to load-bearing capacity and stable operation of installed equipment.  The clear height of gantries is ≥ 5,5 m (measured from the the ground to the lowest obstruction hanging on the gantry);

2.5.7.5. In cases where Gantry No. 1 or Gantry No. 3 is not placed, the equipment from those gantries shall be installed on Gantry No. 2 or on columns, cantilevers to ensure the functionality of the front and rear license plate reading cameras, panoramic surveillance cameras, and other equipment (if any).

2.5.8. Electrical cabinet installation columns, computer cases, data transmission systems, control equipment hanging on columns, and VMS placed in road safety corridors or cantilevers, gantries according to the approved project design.

2.5.9. There must be a design solution to prevent overloaded vehicles from entering expressways; slip roads must have appropriate road surface structures and road signs (including VMS, red flashing lights, alarms) for overloaded vehicles to exit expressways to rectify and handle violations in accordance with regulations. There must be a suitable distance between slip roads and the end point of the weighing equipment installation area, ensuring that overloaded vehicles can move onto the exit ramp safely after receiving information from VMS while meeting the minimum safe distance between two vehicles as required. Road signs must be placed at the beginning and end of slip roads to ensure traffic safety.

2.5.10. The maximum use of existing infrastructure and equipment at tollbooths or existing road works (concrete roads, gantries, land division signs, camera systems, and auxiliary equipment) must be considered during the design of the road surface structure.

2.6. Requirements for design and placement of road signs at weigh stations

2.6.1. The design and placement of road signs at weigh stations shall comply with QCVN 41:2024/BGTVT and this Regulation.

2.6.2.  “Weigh station ahead” sign: shall be placed at least 01 km and 500 m (if there is no intersection) before the zero chain age point of the weigh station.  In cases where there is an intersection within a distance of less than 1 km before the zero chain age point of the weigh station, only one combination sign shall be placed after the intersection. Combination sign shall be placed on a gantry, cantilever, or column, including sign I.427(b) or sign IE.463 (for expressway), with the content “WEIGH STATION” accompanied by sign S.502 “Distance to the sign subject” in accordance with QCVN 41:2024/BGTVT.

 Figure 1. Illustration of Weigh station ahead sign

(The number written on sign S.502 depends on the actual distance to the weigh station)

2.6.3. Weigh station road sign:  sign I.427b or sign IE.463 (for expressway) in accordance with QCVN 41:2024/BGTVT shall be placed at the zero chain age point of the weigh station on a gantry or column, with the content "WEIGH STATION”.

 Figure 2. Illustration of Weigh station sign

2.6.4. Minimum distance between vehicles sign:  sign P.121 in accordance with QCVN 41:2024/BGTVT shall be installed on Gantry No. 1 and Gantry No. 2 to control the minimum distance between vehicles, ensuring the accuracy of the license plate recognition camera system. The specific distance value depends on the requirements of each license plate recognition camera system and regulations on the minimum safe distance between two vehicles. Line 7.8 "Line determining the distance between vehicles on the road” and sign P.121 “Minimum distance between two vehicles” shall be placed at the beginning and end of weighing equipment installation area in accordance with QCVN 41:2024/BGTVT.

 Figure 3. Line determining the distance between vehicles on the road

(for reference only)

 Figure 4. Minimum distance between vehicles sign:

(the value of “30m” is for reference only)

2.6.5. Lane control sign:  sign R.412f "Lane for automobiles" and sign R.412g "Lane for motorcycles and bicycles" shall be installed on Gantry No. 1 to divide the lanes for automobiles, motorcycles (including mopeds), and bicycles (including other types of non-motorized vehicles) to ensure that vehicles are in the correct lane before entering the weighbridge. In cases where there is a separate lane for trucks, sign R.412c "Lane for trucks" or other appropriate signs according to QCVN 41:2024/BGTVT shall be used.

(a) Sign R.412f "Lane for automobiles"

(b) Sign R.412g "Lane for motorcycles and bicycles"

(c) Sign R.412c "Lane for trucks"

 Figure 2. Illustration of Lane control sign

2.6.6. Maximum and minimum speed limit signs  sign P.127 "Maximum speed limit" and sign R.306 "Minimum speed limit" shall be installed in Gantry No. 1 and Gantry No. 2  in accordance with QCVN 41:2024/BGTVT, applicable to vehicles subject to vehicle weigh control that must pass through the weigh station within a specific speed range to achieve accurate measurement results.

 Figure 6. Illustration of maximum and minimum speed limit signs

2.6.7. No stopping and parking sign: Sign P.130 "No stopping and parking" shall be installed on Gantry No. 1 and  Gantry No. 2 in accordance with QCVN 41:2024/BGTVT.

 Figure 7. Illustration of "No stopping and parking" sign

2.6.8. Traffic lights: flashing yellow lights shall be installed on Gantry No. 2 and on height restriction barriers of lanes for non-motorized vehicles and motorcycles (if any) to warn vehicles to reduce speed before entering the weigh station and encountering obstacles.

 Figure 8. Illustration of flashing yellow lights

2.6.9. VMS: include electronic signs placed on gantries or columns or cantilevers beyond the weighbridge to provide information on axle weight, total vehicle weight corresponding to the vehicle license plate; guide vehicles to whether continue the route or exit the expressway or enter the designated area for handling overweight vehicles. VMS shall be placed at an observable location so that drivers can receive complete information.

2.6.9.1. Standard notification include:

(1) License plate combined with the single axle load n; (2) License plate combined with the double axle load n; (3) License plate combined with the triple axle load n; (4) License plate combined with the total vehicle weight.

2.6.9.2. Indicate appropriate directions:

(1) In case there is no violation occurring, VMS shall display the blue text “NO VIOLATION, KEEP MOVING”

 (2) In case there is any violation, VMS shall display the red text “VIOLATION DETECTED, EXIT THE EXPRESSWAY” or “VIOLATION DETECTED, ENTER VIOLATION HANDLING AREA” and set up a warning system including red rotating lights and alarms, display directional arrow signs to guide the vehicle.

2.6.10. Notification in other areas:

2.6.10.1. Where lane control is necessary, signs indicating lanes designated for each type of vehicle or group of vehicles entering weighbridge shall be arranged on gantries, columns, or cantilevers in front of the weighbridge based on the design of the weigh station and according to QCVN 41:2024/BGTVT;

2.6.10.2. Direction signs, warning signs, and prohibition signs shall be considered to be arranged on gantries, columns, or cantilevers at intersection turning points and lane merging points based on the design of the weigh station and according to QCVN 41:2024/BGTVT;

2.6.10.3. Directional arrows on road surface shall be designed and painted in accordance with QCVN 41:2024/BGTVT.

2.7. Requirements for main equipment system of weigh stations

2.7.1. Dynamic weighing system:

2.7.1.1. Automatically and accurately measure weight of each axle, axle group, total weight of the vehicle participating in road traffic when passing through the weighbridge at a speed ranging from 03 km/h to 120 km/h or a maximum speed suitable for the design speed of the road;

2.7.1.2. Approve and inspect samples with a minimum accuracy level of F10 according to regulations of law on measurement for group 2 measuring instruments; ensuring the maintenance of accuracy, stability, reliability, and sustainability during the interval between inspection periods;

2.7.1.3. Automatically detect vehicle type, axle structure, axle distance, vehicle speed, time, and location when passing through the weighbridge;

2.7.1.4. Control vehicles passing through the weighbridge to weigh axle loads ≥ 30 tons, calculate load-bearing capacity to prevent damage caused by overloaded vehicles;

2.7.1.5. Have a minimum water resistance rating of IP68 or higher, enable to operate 24/7 in all weather conditions and operate independently when disconnected from the control center.

 2.7.2. License plate recognition camera system shall recognize both front and rear license plates (including automobiles, tractors, semi-trailers, or trailers, straight trucks towing a trailer); license plate recognition cameras and lane monitoring cameras with 24/7 operation must have a minimum water resistance rating of IP66 or higher.

2.7.3. Panoramic surveillance cameras are 24/7 PTZ cameras with a minimum water resistance rating of IP66 or higher, perform 24/7 security surveillance and traffic control within areas under all weather conditions. The camera installation location must be determined to achieve the maximum efficiency.

2.7.4. Weighing data processing software system and license plate recognition camera system shall be integrated into a system, integrated all information and data obtained; extract vehicle registration information in the database on road traffic order and safety or databases of competent authorities on vehicle registration; determine parameters, data on weight, type, time, speed, location of the vehicle passing weighing equipment or lane where the weighing equipment is placed; recognize license plates; analyze images or signals to detect vehicles violating road traffic rules, statistics, reports; meet the requirements for linking, transmitting, exploiting, and using weighing data of entities charged with managing weighing station and competent authorities; ensure the integrity, completeness, and continuity of weighing data.

2.7.5. Lightning protection system and grounding system for the entire work of weighing station must meet the requirements of TCVN 9385:2012 and TCVN 9358:2012.

2.8. Requirements for other equipment systems of weigh stations

2.8.1. Server and storage system must be able to process and store weighing data (such as weighing results, lane surveillance video files, images of vehicles passing through the weighing station) for a minimum of 1 year and meet the requirements of competent authorities to serve post-inspection work; weighing data used for collecting, analyzing, and evaluating the impact of vehicle load on road safety (excluding images of vehicles) be stored for a minimum of 10 years. Computer software must ensure information security in accordance with regulations, prevent interference, alteration, or modification of data obtained from weighing device systems, ensure the integrity, completeness and continuity of weighing data.

2.8.2. Lane control monitors (if any) must be industrial computers  with processing speed and stable operation in off-site environments (such as temperature, humidity, dust, corrosion, rain, wind, storms); computer configuration must meet the design requirements, ensuring the integrity, completeness, and continuity of weighing data.

2.8.3. Data transmission system must have a backup mode to ensure continuous operation and avoid incidents to the weighing station equipment system; synchronize and share data with relevant authorities.

2.8.4. Power supply system must operate 24/7 and automatically transfer power sources. Power backup devices serve to supply power to computers and other devices in the event of a power outage and an external battery with adjustable capacity is required. The power and capacity of the power backup devices are selected to meet the 24/7 operation requirement of the aforementioned devices during backup power operation.

2.8.5. Technical cabinet is an outdoor specialized cabinet with a minimum IP54 rating, thermal insulation system, forced ventilation system, door lock, and remote alarm system when its door is opened.

2.8.6. Weighing data exploitation equipment system (computers, printers, and other devices used to manage and exploit weighing data) must be connected for data transmission with the weighing system software to exploit, process weighing data, and ensure information security in accordance with regulations.

2.8.7. Information technology system must meet the requirements according to cybersecurity levels; ensure data access control, prevent interference, alteration, or modification of data obtained from weighing device systems, including images captured by camera systems.

2.9. Requirements for weighing data

2.9.1. Weighing data for each operation is displayed in written form or in electronic data.

2.9.2. Weighing data is connected and shared with traffic command centers and other relevant authorities in accordance with regulations. Data connection and sharing methods comply with the Law on Electronic Transactions (connection and sharing through intermediate systems or direct connection between information systems and databases when intermediate systems are inaccessible or governing bodies of intermediate systems assess that such intermediate systems fail to satisfy requirements for data connection and sharing)

2.9.3. Evaluation results of weighing data in a specific period or number of trials must ensure a minimum accuracy of 93% (except in cases where the license plate is obstructed, obscured, dirty, deformed, unidentifiable; the license plate is issued against the law; the vehicle deviates from lane, fails to maintain a proper distance, or fails to ensure the required speed at the weighing station; the registration and inspection data of the vehicle cannot be accessed due to objective reasons).

3. Regulations on management

3.1. Weighing stations must be invested, built, and put into operation and exploitation in accordance with this Regulation.

3.2. Declaration of conformity with regulations:

3.2.1. Before putting a weighing station into operation, the conformity of its system and equipment must be declared in accordance with Clause 2.7 and 2.9 of this Regulation as specified in Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of Minister of Science and Technology on declaration of standard conformity and declaration of technical-regulation conformity and method to assess the conformity with standards and technical regulations, amended by Circular No. 02/2017/TT-BKHCN dated March 31, 2017 on amendments to some Articles of Circular No. 28/2012/TT-BKHCN.

3.2.2. The declaration of conformity with regulations must based on the results of certificate of conformity issued by conformity assessment bodies designated by the Department for Roads of Vietnam according to Circular No. 09/2009/TT-BKHCN dated April 8, 2009 of Minister of Science and Technology on guidelines for the requirements, procedures, and designation of  conformity assessment bodies or recognized in accordance with Circular No. 27/2007/TT-BKHCN dated October 31, 2007 of Minister of Science and Technology on signing and implementation of agreements for the mutual recognition of conformity assessment results.

3.2.3. Conformity assessment methods applicable to weighing station are method 8 (specified in Appendix II of this Regulation on declaration of standard conformity and declaration of technical-regulation conformity and method to assess the conformity with standards and technical regulations attached to Circular No. 28/2012/TT-BKHCN dated December 12, 2012, amended by Circular No. 02/2017/TT-BKHCN);

3.2.4. Organizations and individuals which have their conformity certified shall register the conformity declaration at the Department of Transport where they are registered to conduct business activities.

4. Responsibilities of organizations and individuals

4.1. Vietnam Register shall connect, share, and use vehicle registration data as required.

4.2. Organizations and individuals investing in, managing, operating the weighing station project shall:

4.2.1. Invest in construction, upgrade, renovation, management, maintenance, putting into use and operation of weighing station project in accordance with this Regulation;

4.2.2. Declare conformity of weighing station system stipulated in Section 3.2 of this Regulation; assess the cybersecurity of information technology system as required;

4.2.3. Connect and use vehicle registration as per regulations;

4.2.4. Connect and share weighing data with traffic command centers and other relevant authorities in accordance with regulations.

4.3. Conformity assessment bodies shall assess and issue certificates of conformity for weighing stations in accordance with this Regulation.

5. Implementation

5.1. The phrase "Trạm kiểm tra tải trọng xe" in the name of weigh stations invested in and put into operation according to the regulations in QCVN 66:2024/BGTVT shall be replaced with "công trình kiểm soát tải trọng xe" in accordance with this Regulation. Both phrases mean "weigh station".

5.2. The Department for Roads of Vietnam is responsible for organizing and inspecting the implementation of this Regulation.

5.3. In cases where the standards, regulations, legislative documents referenced in this Regulation are amended, supplemented, or replaced, the amendments, supplements or replacements shall be applied./.

APPENDIX A - Illustrative diagrams of weigh stations on road

Figure A-1: Illustration diagram of the general model of weighing station

Figure A-2: Illustration diagram of the general model of weighing station (01 lane)

Figure A-3: Illustration diagram of the model of weighing station

(01 lane, before tollbooth)

Figure A-4: Illustration diagram of the model of weighing station (multiple lanes, before tollbooth)

Figure A-5: Illustration diagram of the model of weighing station (01 lane, after tollbooth)

Figure A-6: Illustration diagram of the model of weighing station (multiple lanes, after tollbooth)