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International Road Dynamics Inc. / PAT Traffic


International Road Dynamics Inc. (IRD) is an Intelligent Transportation Systems (ITS) company with over 35 years’ experience producing integrated solutions to better manage and improve the safety of highway facilities. IRD’s products and services include weigh-in-motion systems for commercial vehicle operations, traffic monitoring/data collection systems, ITS systems for bridge monitoring and protection, access control and security systems (including border, mine, and port systems), toll collection, fleet telematics, highway traffic management systems, and traffic safety systems.
IRD is headquartered in Saskatoon, Saskatchewan, Canada. International Road Dynamics Corp. in Spring Grove, Illinois manufacturers data collection products and provides service to U.S. customers. IRD’s international subsidiaries are PAT Traffic Ltda. in Chile ( IRDSA in India, and XPCT in China ( IRD provides sales, installation, service, and maintenance across North America and worldwide through a network of subsidiaries, partners and distributors.


IRD’s iSINC® Electronics form the core of IRD's Weigh-In-Motion (WIM) systems. Out of the box, iSINC® performs a broad range of Intelligent Transportation System (ITS) functions, from data collection and web-based traffic monitoring, to weigh-station automation. A “lite” version of the iSINC® provides a compact, rugged, and energy-efficient system that is a popular choice for modernizing data collection systems. The iSINC® is a suitable controller for IRD’s WIM scales and sensors and also those produced by other vendors. A wide variety of peripherals, including cameras and message signs, also interface with the iSINC®.
IRD’s software is used in systems for traffic data analysis and reporting (VI2M™, iAnalyze®), in toll systems (iToll®), and for operating weigh stations and virtual weigh stations.
IRD’s High Speed Weigh-In-Motion (HSWIM) scales are suitable for WIM applications including weigh station sorting systems, traffic monitoring, bridge protection, WIM@Toll® applications and data collection. IRD’s SLC Load Cell scales have established a benchmark for reliability, and thousands of IRD-PAT Bending Plate Scales are incorporated in ITS systems worldwide.
IRD’s portable WIM systems include the TRS WIM for data collection and the DAW 300 and SAW III scales for enforcement weighing.
In addition to WIM, IRD supplies a variety of complementary technologies such as off-scale sensors and toll treadles. IRD recently introduced TACs, a tire anomaly and classification system that uses IRD’s VectorSense™ tire sensor suite to screen for commercial vehicles that are unsafe due to missing or underinflated tires.


  • Overload enforcement
  • Pavement engineering
  • Traffic Data and Reporting
  • Road Pricing / Toll Systems
  • Access Control Systems
  • Homeland Security / Border Systems
  • Automated Weigh Stations
  • Virtual Weigh Stations


IRD-supplied installations include WIM systems for Data Collection and Automated Weigh Stations in North America, IRD-PAT Bending Plate® systems in Australia and South Africa, Mainline and Ramp sorter systems in the Middle East, WIM@Toll® systems in South America and Asia, and Virtual Weigh Stations in Europe, among many others. Specific references are available on request.
International Road Dynamics Inc. / PAT Traffic


702, 43rd Street East
S7K 3T9 Saskatoon, Canada




+1(306) 653 66 00


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