NMi WIM standard Cock Oosterman NMi Certin Hans

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

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

Weigh-In-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 12 th 2018

Weigh-In-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. SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 4

Weigh-In-Motion Standard Development of Standard • 3 International Standards • COST-323, ASTM-E 1318, OIML-R 134 • 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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 5

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

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

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

Weigh-In-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. SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 9

Weigh-In-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) SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 10

Weigh-In-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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 11

Weigh-In-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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 12

Weigh-In-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) SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 13

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

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

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

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

Weigh-In-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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 18

Weigh-In-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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 19

Weigh-In-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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 * For Weight Enforcement 20

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

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

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

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

Weigh-In-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. • to provide input for maintenance, trouble shooting and calibration of the WIM systems Users Data Base Calibration Data Quality Checks Maintenance Good Data SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 Bad Data Problem Assessment 25

Weigh-In-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 SATC - ISWIM Weigh-In-Motion Workshop - July 12 th 2018 26

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