In recent years, with the expansion of highway freight transport and the continuous growth of heavy-duty trucks, the issue of over-limit and overloaded vehicles has posed serious threats to traffic safety and the longevity of road infrastructure. To enhance enforcement efficiency, transportation authorities across regions are advancing technology-driven overload control systems centered on WIM weighbridges. By integrating weigh-in-motion, non-stop detection, license plate recognition, video monitoring, and data management platforms, these systems enable intelligent supervision of freight vehicles. The development of weigh-in-motion technology has gradually transformed traditional enforcement methods—relying on manual interception and fixed weigh stations—into automated, information-based, and around-the-clock monitoring models.
Overloading has long been known to significantly increase vehicle braking distances, reduce handling stability, and sharply elevate the risk of accidents. Overloaded vehicles also inflict far greater damage on pavements and bridges than standard-load vehicles. Studies indicate that doubling a vehicle’s load can cause fatigue damage to road structures equivalent to more than 20 passes of a standard axle load. According to the Ministry of Transport, tens of thousands of bridges nationwide are damaged each year due to overloaded vehicles, with maintenance and reinforcement costs exceeding tens of billions of yuan. In addition, overloading increases fuel consumption and pollutant emissions, posing adverse effects on the environment and public health.
Traditional overload control relies on fixed weigh stations and manual patrols, which are inefficient, labor-intensive, and unable to cover extensive road networks. Some overloaded vehicles evade penalties by rerouting, operating at night, or bypassing inspection points, highlighting the limitations of conventional approaches. In response, the technology-driven overload control system centers on WIM weighbridges and integrates off-site enforcement technologies, enabling automatic vehicle weighing without stopping, remote evidence collection, and digital management.
WIM weighbridges can be classified according to their load-bearing structure and weighing method: axle-type weighbridges measure individual axle loads, multi-axle (or axle-group) weighbridges measure axle group loads, and multi-lane combination weighbridges cover multiple lanes to meet the detection requirements of highways and national or provincial roads. Load cell types include strain-gauge and quartz-crystal, with quartz-crystal load cells offering higher precision and faster response, making them suitable for high-speed dynamic weighing. WIM weighbridges collect tire load signals through embedded roadway load cells, and by combining signal processing with algorithmic computation, they achieve vehicle weighing without stopping, improving detection efficiency and reducing traffic congestion caused by queuing.
The off-site enforcement system is built on the foundation of WIM weighbridges and includes weighing equipment, license plate recognition and capture devices, video surveillance systems, and information display facilities. As vehicles pass through the detection zone, the WIM weighbridge collects weight data, the license plate recognition system captures the plate and vehicle characteristics, and the video system records the entire process to provide evidence for enforcement. Information display devices use variable message signs to inform drivers of the detection results or guide them to unloading points. All equipment is networked with a backend management platform, enabling real-time data upload, centralized management, and automated analysis. When a vehicle exceeds the weight limit, the system automatically generates a record and notifies enforcement authorities, completing off-site administrative penalties.
With the advancement of smart transportation, WIM weighbridges are evolving toward high-precision, multi-lane, and intelligent systems. When integrated with vehicle recognition, transport data analysis, and logistics monitoring functions, they provide comprehensive data support for traffic management authorities, effectively curb over-limit and overloaded transport, enhance road safety, extend the lifespan of infrastructure, and promote the development and application of technology-driven overload control systems.
Post time: Mar-09-2026