Weigh In Motion systems, truck overloading

Weigh In Motion solutions

Traffic monitoring, weight enforcement and bridge protection made simple

Ageing infrastructures, increasing traffic and overloaded vehicles pose a threat to societies and call for countermeasures to keep roads and bridges safe. Advanced Weigh In Motion (WIM) solutions from Kistler enhance traffic safety, help to maintain road quality and protect bridge infrastructure.

System integrators all over the world opt for WIM solutions from Kistler as part of high-level traffic management systems. Thanks to reliability and robustness, high accuracy and simple integration, operators rely on our solutions to safeguard and sustain traffic and structures.

Quartz crystal technology from Kistler - at the core of every sensor

Our WIM solutions are based on the Lineas high-precision quartz crystal sensors. They are renowned for their consistently high performance over time under all possible traffic and weather conditions.

Lineas sensors are used to measure wheel and axle loads, and they can also determine gross vehicle weights with no disruption to traffic flow. Installed in the road pavement, these sensors deliver highly accurate measurement signals.

Quartz crystal technology for the most challenging piezo dynamic force measurement applications

Innovation

The secret of our WIM solutions’ outstanding performance: Kistler’s unique piezoelectric quartz technology combined with advanced sensor design. Up to 50 disk-shaped quartz crystals, each no larger than a contact lens, are at the heart of every Lineas sensor.

Accuracy

With their wide measuring range, Lineas sensors can accurately measure both light and heavy vehicles, maintaining high levels of accuracy across all vehicle types. From walking pace to racing speeds, our WIM solutions ensure consistent results at all vehicle velocities.

Stability

Lineas sensors have demonstrated their durability across various pavements worldwide, performing with precision from the cold winters of Europe to the hot deserts of the Middle East. Designed for long-term reliability, they have a life expectancy of at least 10 years. Built on Kistler's pioneering expertise, the Lineas sensors are virtually maintenance-free, even with extensive use, and often outlast the roads they are installed on.

Kistler - the global market leader in WIM technology

Kistler is the global market leader in Weigh In Motion Technology, pioneering precise, reliable solutions trusted globally. With decades of expertise, Kistler sets the benchmark for real-time, accurate vehicle weight data of vehicles in motion, driving efficiency and innovation across industries.

100.000+ Lineas sensors

installed worldwide

30+ years of innovation

with unique quartz technology

50+ countries

where Kistler traffic solutions are present

Manufactured to highest quality standards

As a leading provider of quartz piezoelectric measurement technology, we achieve maximum performance by using advanced production equipment operated by skilled specialists at our ISO-certified Swiss plant. Advanced manufacturing processes allow us to maintain full control of every step, ensuring the highest quality at every stage.

Each sensor undergoes rigorous inspections, including tightness checks and functional tests. We verify uniform sensitivity across the entire sensor length using our calibration system. Every sensor is 100% tested, factory-calibrated, and checked with high-precision tools before leaving our Swiss headquarters, ensuring reliable, top-quality products.

Applications

Kistler’s WIM solutions are designed to cover a wide range of applications, including:

Pre-selection for weight enforcement

WIM solutions enable efficient vehicle preselection for traffic checks by quickly providing essential weight data. These solutions automatically record vehicle weights, axle loads, and tire conditions at high speeds, resulting in higher success rates for identifying potential violators and reducing the workload for authorities.

Automatic preselection of overloaded vehicles
Less road damage and elimination of illegal competition between transport companies

Direct weight enforcement

Once legal requirements are met, direct weight enforcement with a high speed WIM solution provides the most efficient method for automated heavy vehicle checks. Thanks to Kistler's high accuracy standards, violators can be detected across multiple traffic lanes and penalized immediately.

24/7 automatic enforcement of load violations without disrupting traffic flow
Significant improvement in weight enforcement campaigns with direct fines for overloaded vehicles, eliminating the need for static scales
OIML R134 certification facilitates national type approvals

Explore KiTraffic Digital

Automated tire screening

Incorrectly inflated tires are not easy to detect by visual inspections. Automated Tire Screening (ATS) is a feature of WIM solutions that allows authorities to automatically monitor tire pressures on all passing commercial vehicles, helping to identify potentially unsafe, damaged, or flat tires and improve road safety.

Automatic tire checks on all passing vehicles without disrupting traffic
Detection of tire types and anomalies such as underinflation, flats, mismatches, or missing tires
Available as simple upgrade for existing Kistler WIM sites

Explore KiTraffic Digital

Traffic data collection

WIM solutions help refine infrastructure planning, optimize road maintenance, and improve traffic flow uniformity by providing real-time traffic data collection.

Automated, non-stop traffic data collection
Reliable and accurate measurement of vehicle loads
Enriches count & classify data with weight information
Tracking of special transports

Bridge protection

WIM solutions from Kistler protect bridges worldwide: by collecting traffic load data as well as preventing overloaded vehicles from passing the bridge.

WIM data enables traffic load analysis and life expectancy calculations
Protection against overloaded vehicles - extending bridge lifetimes
Seamless combination with Structural Health Monitoring systems

Learn more

Industrial weighing

WIM solutions provide a highly efficient way to manage industrial weighing, helping to streamline processes such as invoicing goods, checking axle loads, and measuring overall vehicle weights in ports, mines, and concrete plants-all as vehicles drive by.

Increased efficiency and higher throughput of measured vehicles per hour
OIML R134 certified for legally compliant weighing
Easy integration with components like RFID transmitters or LPR cameras for enhanced functionality
Fast installation with minimal disruption to operations

Weight based tolling

WIM solutions generate revenue for road construction by charging users based on their vehicle's weight and road impact, ensuring fair tolls, covering maintenance costs, and preventing overloaded vehicles from accessing roads and bridges.

Easy integration with existing toll systems
Scalable for multiple lanes

Accuracy you can trust

Our WIM solutions combine unique Lineas sensors, industrial-grade electronics and advanced software, all developed, tested and manufactured according to highest quality standards. Fully compliant with globally recognized standards, including OIML R134, COST 323, and ASTM E1318-09, Kistler’s WIM solutions provide an independent proof of performance, delivering reliable, accurate vehicle weighing.

Flexible integration and networking

Our WIM solutions can be easily extended with additional third-party components like vehicle dimension scanners or ANPR cameras for number plate recognition. With machine-readable interfaces and open data protocols, our WIM measuring chains can be integrated seamlessly into upper traffic management solutions.

Solutions from Kistler enable 24/7 real time condition monitoring of sensitive infrastructures such as bridges and buildings.

Global support and comprehensive services

Thanks to Kistler's global sales and service network, we offer a range of tailored services to maximize the performance of every WIM site. Our services include expert support during site selection, installation, and calibration, as well as comprehensive training programs and warranty extensions to enhance the individual WIM user experience and extend the lifespan of each system.

Explore Weigh In Motion services

Efficient and minimally invasive installation

Lineas sensors are designed for quick installation, typically completed within a single day, and deliver reliable measurements for years. Lineas sensors can be installed on all types of pavement, including concrete and asphalt, with minimal disruption to traffic flow and limited need for road closures. Installation is cost-effective, requiring no heavy machinery and causing minimal road damage—only a small slot in the pavement. The modular and flexible design allows for easy adaptation to different lane widths, and the absence of screws or frames reduces the risk of flying parts, ensuring a safe and efficient setup.

Best Reliability

KiTraffic solutions combine Kistler’s unique Lineas quartz WIM sensors with proprietary electronics and software for the most accurate and reliable vehicle detection

Unmatched Accuracy

Advanced software specifically developed for Lineas WIM sensors ensures the highest accuracy, from low to high speeds, meeting the strictest OIML accuracy standards

Seamless Integration

Open data protocols for seamless transfer of vehicle data ensure effortless integration into upper systems

User-Friendly Setup

A modern web-based interface allows easy setup and calibration of WIM sites

Tailored KiTraffic Solutions

Choose from a variety of KiTraffic packages, each designed to meet the specific requirements of different WIM applications, ranging from traffic data collection to direct enforcement. Our KiTraffic measuring chains for WIM, are based on the piezoelectric quartz technology of Kistler’s Lineas sensors and comprising electronics. KiTraffic Statistics and KiTraffic Basic consist of analogue Lineas sensors and WIM Data Loggers. The certified solution for enforcement, KiTraffic Digital, consists of the Lineas Digital sensors and industrial grade electronics with Kistler software.

KiTraffic Statistics

The cost-efficient solution for traffic data collection

Accuracy
- ±10-15% GVW (gross vehicle weight)
Scope of delivery
- Lineas Compact 9196A sensors
- WIM Data Logger

Explore KiTraffic Statistics

KiTraffic Basic

The reliable solution for pre-selection of overloaded vehicles

Accuracy
- Accuracy: ±5-10% GVW (gross vehicle weight)
- Certified to OIML R 134 class F10
Scope of delivery
- Lineas 9195G sensors
- WIM Data Logger

Explore KiTraffic Basic

KiTraffic Digital

The most advanced solution for direct weight and tire enforcement

Accuracy
- Accuracy: ±2-5% GVW (gross vehicle weight)
- Certified to OIML R 134 class F5
Scope of delivery
- Lineas Digital 9181A sensors
- Industrial grade electronics with Kistler software

Explore KiTraffic Digital

Weight enforcement references

The Brooklyn-Queens Expressway in New York is protected by Weigh In Motion from Kistler for direct weight enforcement.

Brooklyn Queens Expressway (US)

In New York city the Brooklyn-Queens Expressway (BQE) with a triple-cantilever design is facing tremendous challenges due to overladed vehicles. Kistler's Weigh In Motion systems were deployed to help identify overloaded vehicles automatically. Recently Kistler’s WIM systems were certified and put into operation as the first automated citation system in the country and as a result overloading is diminishing. The collected data is also used to calculate the bridge's life span and to perform accurate traffic load analysis. “The collaboration with Kistler and C2SMART was key to bringing this first-in-the-nation automated direct enforcement system to life,” said Tanvi Pandya, P.E. DBIA, executive director, BQE Design Build & Emergency Contracts.

Data collection and research references

Erftstadt, A1 Highway (Germany)

The Institute of Highway Engineering at Germany’s RWTH Aachen University chose Kistler’s KiTraffic Digital for their pioneering ‘Digital Twin Road’ research project.

In 2023, ten Lineas Digital sensors were integrated seamlessly into Germany’s busy A1 highway – with no need for special road preparation or repaving.

A special sensor layout was designed exclusively for this project – highlighting Kistler’s commitment to offering flexible layout options and meeting customers’ needs.

Bridge protection references

Weigh In Motion for bridges: El Carrizo (227 m), equipped with Kistler WIM, is the second highest bridge in North America.

El Carrizo Bridge (Mexico)

The El Carrizo highway bridge in Mexico, the second highest bridge in North America, faced a significant traffic accident in 2018, leading to its closure. To enhance its safety two Weigh In Motion (WIM) checkpoints were installed using Kistler technology. The WIM system, consisting of accurate Lineas WIM sensors, measures automatically axle loads and total vehicle weights of passing vehicles. The WIM solution provided by Kistler ensures optimal compliance with weight restrictions and improves the overall bridge safety.