COMMERCIAL MOTOR VEHICLE WEIGHT ENFORCEMENT

CURRENT CHALLENGES Significant Growth in CMV Traffic Increased congestion and delay Demand for larger and heavier vehicles Mounting stress on infrastructure Greater need for effective and efficient enforcement

CURRENT CHALLENGES Overweight CMV Travel Premature deterioration of the pavement Increased roadway maintenance costs – Annual state-level costs from $8 to $144 million – Annual national costs from $265 million to $1.11 billion Compromised safety levels

CURRENT CHALLENGES Personnel Limitations Fixed weigh facilities inflexible to industry travel, loading, routing patterns – Restricted, predictable hours of operation – Vehicle capacity limitations – Successfully bypassed Significant effort expended on compliant carriers – Violation capture rates of 1% on U.S. Interstates

BACKGROUND 2006 European Scan Tour Emerging technologies Unconventional procedures Novel data applications Innovative funding mechanisms Multinational harmonization THE NETHERLANDS BELGIUM GERMANY FRANCE SLOVENIA SWITZERLAND

EUROPEAN APPROACH Unique Partnerships Similar agencies of different jurisdictional levels – National and regional law enforcement agencies Different agencies – Transportation, law enforcement, regulatory, and prosecution agencies In The Netherlands, the Ministry of Transport funds 100 additional limited capacity National Police Agency officers who focus 40% and 60% of their time on weight enforcement and congestion/incident management activities, respectively.

EUROPEAN APPROACH Technology-based Policies/Procedures Pre-selection for manual enforcement – Various countries, supports mobile and fixed operations Enforcement resource scheduling – France, Slovenia, The Netherlands utilize historic WIM data Preventative carrier contacts – France, The Netherlands target habitually non-compliant carriers Pre-selection, enforcement resource scheduling, and preventative carrier contacts often combined to provide comprehensive enforcement approach.

EUROPEAN APPROACH Bypass prevention – France, The Netherlands support: – site selection – site level system plans Direct enforcement – France, The Netherlands leading efforts – Low-speed and high-speed WIM – Attaining sufficient WIM system accuracy levels – Gaining metrological certification – Modifying existing laws that require static measurements

SUPPORTING TECHNOLOGIES Overheight Vehicle Detection System Vehicle Profiler System WIM Systems – In-road – Bridge Dynamic Calibration Vehicle Vehicle Identification System Advanced Routing/Permitting System Archived Records Database

SUPPORTING TECHNOLOGIES In-road WIM System Functions Measures and records axle, gross weight using piezo quartz, piezo ceramic, fiber optic sensors Considerations Provides 24/7 monitoring May be less accurate than traditional WIM systems Low cost supports wider implementation Estimated Cost $9,000 - $32,500 per lane Varies by sensor type, on-site communication requirements Requires additional, ongoing maintenance with associated costs

SUPPORTING TECHNOLOGIES Bridge WIM System Functions Measures, records weight using existing structures instrumented with strain transducers/gauges Measures, records axles using traditional sensors or Nothing-on-Road/Free-of-Axle Detector (NORFAD) systems Considerations Requires suitable bridge and location Most successful on short, stiff bridges Structural assessments require transducer calibration Calibration may require specialized expertise Estimated Cost $100,000 - $130,000 per bridge/system Varies by sensor type, on-site communication requirements

SUPPORTING TECHNOLOGIES Vehicle Identification System Functions Cameras capture vehicle silhouette, license plate images OCR software converts license plate image to numeric data Images/data transmitted via DSRC to portable computer used by enforcement officials Considerations Conversion of license plate images may result in errors Estimated Cost $52,000 - $80,000 per system Varies by camera type, on-site communication requirements

SUPPORTING TECHNOLOGIES Archived Records Database Functions Supports data-driven enforcement scheduling Supports preventative carrier contacts Supports enhanced data quality Encourages long-term performance monitoring Considerations Requires procedures for quality control Estimated Cost $225,000 - $300,000

IMPLEMENTATION PRE-SELECTION/ BYPASS PREVENTION Archived Records Database Vehicle Identification System Bridge WIM System In-road WIM System AND/OR DSRC Camera/OCR Computer Interface/Software Weight/Axle Sensors (X Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy)

IMPLEMENTATION PRE-SELECTION/ BYPASS PREVENTION RESOURCE SCHEDULING/ PREVENTATIVE CONTACTS Archived Records Database Vehicle Identification System Bridge WIM System In-road WIM System AND/OR DSRC Camera/OCR Database DSRC Camera/OCR Computer Interface/Software Weight/Axle Sensors (X Weight Accuracy) Computer Interface/Software Weight/Axle Sensors (X Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy)

IMPLEMENTATION PRE-SELECTION/ BYPASS PREVENTION RESOURCE SCHEDULING/ PREVENTATIVE CONTACTS DIRECT ENFORCEMENT Archived Records Database Vehicle Identification System Bridge WIM System In-road WIM System AND/OR Database DSRC Camera/OCR Database DSRC Camera/OCR DSRC Camera/OCR Computer Interface/Software Weight/Axle Sensors (X Weight Accuracy) Computer Interface/Software Weight/Axle Sensors (X Weight Accuracy) Computer Interface/Software Weight/Axle Sensors (Y Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy)

BENEFITS Increased violation capture rates – The Netherlands reported 80% violation capture rate Reduced fixed facility demand, mainline safety/ congestion concerns Reduced harmful emissions from static weighing Significant infrastructure damage cost savings – Montana reported $700,000 annual cost savings from technology-based, enforcement resource scheduling

FUNCTIONAL INTERFACE

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