The fixed road overload control system provides continuous supervision of commercial vehicles during road operation by means of fixed weighing and information acquisition facilities. It enables 24/7 overload and over-limit monitoring at expressway entrances and exits, national, provincial, municipal and county-level highways, as well as bridges, tunnels and other special road sections. Through automated collection and analysis of vehicle load, axle configuration, external dimensions and operating behavior, the system supports accurate violation identification and closed-loop regulatory enforcement.
Technically, fixed overload control systems include static weighing and dynamic weighing solutions, with dynamic systems further classified into low-speed and high-speed modes. In response to differing road conditions, accuracy requirements and cost considerations, two typical application schemes are formed: a high-precision low-speed dynamic weighing system for expressway entrances and exits, and a high-speed dynamic weighing system for ordinary highways.
Expressway Entrance and Exit Overload Control Management System
I. Low-Speed Dynamic Weighing System
The expressway entrance and exit system adopts the principle of “entry control, exit verification and full-process traceability.” A low-speed, high-precision eight-platform dynamic weighing system is installed upstream of the toll plaza to inspect vehicle load and dimensions before entry, ensuring that only compliant vehicles enter the expressway. Where required, the same type of system may be deployed at exits to verify load consistency, prevent illegal cargo transfer in service areas and support weight-based toll collection.
The system replaces the traditional “high-speed pre-selection plus low-speed verification” model with a single low-speed high-precision solution, ensuring sufficient measurement accuracy for enforcement while reducing construction and maintenance costs and improving data consistency and legal validity.
1. Overload Control Process
Vehicles pass through the weighing zone at controlled speed, where load, axle data, dimensions and identification information are automatically collected through integrated weighing, recognition and video monitoring equipment. The system automatically determines overload or over-limit conditions and guides non-compliant vehicles to a fixed control station for unloading, verification and enforcement. Confirmed results are recorded and penalty information is generated through the unified management platform. Vehicles evading inspection are subject to evidence retention and blacklist or joint enforcement measures. Entrance and exit control points may share a single control station where conditions permit.
2. Key Equipment and System Functions
The core equipment is the eight-platform dynamic axle load scale, supported by high-reliability sensors, weighing instruments and vehicle separation devices to ensure accuracy under continuous traffic flow. An unattended weighing management system centrally manages weighing data, vehicle information and video records, enabling automated operation, remote supervision and future system expansion.
II. High-Speed Dynamic Overload Control System
For national, provincial, municipal and county highways with complex networks and numerous access points, the high-speed dynamic overload control system adopts a “non-stop detection and non-site enforcement” approach. Flat-type high-speed dynamic vehicle scales installed on mainline lanes measure axle load and gross vehicle weight without interrupting traffic. Integrated recognition and video equipment synchronously collect evidentiary data, which is processed and transmitted to the central platform to form a complete electronic enforcement record.
The system automatically identifies suspected overload violations, issues real-time alerts and guides vehicles to nearby fixed stations for static verification. It supports continuous unattended operation, data caching, fault self-diagnosis and secure transmission, and complies with national dynamic weighing verification standards, providing a reliable technical basis for non-site overload enforcement.
Post time: Dec-15-2025