Advancements in Weigh-In-Motion Standardization

Development and application of Weigh-In-Motion (WIM) technology in legal and statistical contexts, ensuring accuracy in weight enforcement and tolling. Explore the evolution of international standards and the benefits of high-speed and low-speed WIM systems. Learn about the importance of data quality management and certification in facilitating market access and improving traffic management efficiency.

• Weigh-In-Motion
• WIM technology
• Data Quality Management
• Legal Metrology
• International Standards

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1. NMi WIM standard Cock Oosterman NMi Certin Hans van Loo Corner Stone Int.

2. Weigh Weigh- -In In- -Motion Standard Motion Standard Topics Development Background Content Test Procedures Implementation 3 Elements Data Quality Management Type Approval Procedure 2 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

3. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard Dutch, Independent, Test, Inspection, Calibration and Certification Institute 1000 years of experience in Global Legal Metrology Certification & Acceptance World wide Certification (OIML) European Approvals (CE) National Approvals (Enforcement) SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

4. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard Legal Applications: Direct Weight Enforcement and Tolling by Weight Metrology: The measurements of the Weigh-In-Motion systems are used directly as basis for fine/fee. Benefits: Most efficient way of weight enforcement and tolling by weight without any impact on the traffic flow Guarantee: All issued fines/fees must be justified, hence all measurements should always be within specification. 4 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

5. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard 3 International Standards COST-323, ASTM-E1318, OIML-R134 Each with own purpose and (dis-)advantages Parts used in tenders None for legal applications at high speeds Many National Standards All different Often not practical Limitation for new applications Barrier for market access 5 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

6. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard HIGH SPEED Free Flow Conditions With Vehicle Dynamics 4 Areas of WIM LOW SPEED Controlled Conditions No Vehicle Dynamics LEGAL APPLICATIONS Accuracy of each measurement Specified in MPE (100%) HS LS Legal Legal Direct Weight Enforcement Tolling by Weight STATISTICAL APPLICATIONS Accuracy of average measurement Specified in 2 (95%) LS Stat. HS Stat. ??? Statistics on Traffic Loading Pre-Selection Enforcement 6 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

7. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard NMi WIM Initiative (2016) NMi WIM Scope: Automatic WIM-systems. High Speed and Low Speed Performance Requirements Minimum Testing Procedures STANDARD Application: Technology Independent Legal and Statistic Applications International use, free of charge 7 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

8. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard NMi WIM Initiative NMi WIM International Expert Group: Different Manufactures Different Technologies Legal Metrology > 100 year experience STANDARD Balance between: Theoretical requirements Practical conditions 8 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

9. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of WIM Standard Guide to Standard with: Reasons and motivation to develop a new standard and the approach Explanation of the scope, application and structure Explanation of the different level of performance tests The procedures for acceptance Explanations for choices made in the development of the standard itself. 9 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

10. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard Operating Conditions: Ranges for: Speed, Temperature Humidity, EMC, Mains Variation Technical Requirements: Vehicle Record, Completion Rate Time + Speed Recording Length Measurement Vehicle Classification Weighing Requirements: Accuracy Classes, eg. L(5) S(10) 10 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

11. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard Specification of Accuracy classes: Legal applications; L(x) [-MPE, +MPE] interval Includes 100% of measurements Class L(3) L(5) L(7) L(10) GVW 3 5 7 10 Axle Group 5 8 11 15 Axle Load 7 10 15 20 11 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

12. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard Test Procedures Legal Applications 3 test levels Independent Metrological Approval Testing and Certification by NMi or approved National Authority Statistical Applications 2 Test levels Relation between Buyer and Vendor 12 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

13. Weigh Weigh- -In In- -Motion Standard Motion Standard Development of Standard Type Approval: New Type of System Pre-approval Laboratory Tests Large Field Test (90 runs) Initial Verification: After Installation Medium Field Test (60 runs) In-service Verification: After certain period (1 year) Small Field Test (30 runs) 13 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

14. Weigh Weigh- -In In- -Motion Standard Motion Standard Topics Development Background Content Test Procedures Implementation 3 Elements Data Quality Management Type Approval Procedure 14 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

15. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Legal Acceptance Legal System Approval Provides legal basis for use of WIM Requirements for: System Accuracy & Reliability System Operation & Maintenance (Data Quality Management) Acceptance Data Quality Management Included in National Legislation Based on International/NMi Standard 15 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

16. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Preparations for Legal Acceptance in: Czech Republic; Netherlands; Ireland; Estonia: Austria; Poland; Brazil; Argentina; ? ? ? 16 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

17. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard System Approval Legal System Approval Provides metrological reference Acceptance Formal system testing & certification Type Approval, Initial Verification In-Service Verification Data Quality Management Based on international/NMi standard 17 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

18. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Type Approval: 1. Pre-approval Fase Assessment of: All existing documentation Previous test results Determination of Possible missing documentation Acceptance of previous test results Description of required Tests procedures Planning of next Fases Overview of Costs 18 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

19. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard 1. Pre-approval Fase 2. Laboratory Tests At NMi Lab in Dordrecht or Approved National Lab Testing of: Temperature + Humidity Immunity to EMC, Mains variations Hard- and Software Security 19 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

20. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard 1. Pre-approval Assessment 2. Laboratory Tests 3. Field Tests At customer location Organization by Customer Supervision by NMi (or CSI) Testing : 3 different test-trucks, fully loaded* 30 runs each spread over speed range Accepted if: No error > 0.5 * MPE * For Weight Enforcement 20 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

21. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Data Quality Management Legal System Approval Proof of operational stability Acceptance Through combination of: Continuous Checks Maintenance Calibration Data Quality Management Included in the Quality System for the operation of the WIM system 21 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

22. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Legal Acceptance and System Approval Initial Verification In-Service Verification In-Service Verification Legally Specified Max. Error Unknown Real Error 6 months 12 months 22 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

23. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Not always enough! Initial Verification In-Service Verification In-Service Verification Specified Max. Error Unknown Real Error 6 months 12 months 23 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

24. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard What happens in between? Initial Verification In-Service Verification In-Service Verification Specified Max. Error ? ? Unknown Real Error 6 months 12 months 24 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

25. Weigh Weigh- -In In- -Motion Standard Motion Standard Implementation of Standard Purposes of Data Quality Management (DQM): WIM systems to make sure the WIM systems continue to operate within specifications in between hard system verifications. Calibration Data Base Data Quality Checks Maintenance to provide input for maintenance, trouble shooting and calibration of the WIM systems Good Data Bad Data Problem Assessment Users 25 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

26. Weigh Weigh- -In In- -Motion Standard Motion Standard Conclusions New NMi WIM Standard: High Speed and Low Speed WIM Legal and Statistic Applications Performance Requirements Minimum Testing Procedures Technology Independent International use; Free of charge Implementation requires 3 Elements: Legal Acceptance System Approval Data Quality Management 26 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018

27. Weigh Weigh- -In In- -Motion Standard Motion Standard More Information Free to use! Download at NMi website: http://www.nmi.nl/nmi-wim-standard/ Or contact: Cock Oosterman: coosterman@nmi.nl Hans van Loo: hans.vanloo.int@gmail.com 27 SATC - ISWIM Weigh-In-Motion Workshop - July 12th 2018