COMMERCIAL MOTOR VEHICLE WEIGHT ENFORCEMENT. CURRENT CHALLENGES Significant Growth in CMV Traffic Increased congestion and delay Demand for larger and

COMMERCIAL MOTOR VEHICLEWEIGHT 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 NETHERLANDSBELGIUM

GERMANY

FRANCE

SLOVENIASWITZERLAND

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.

WIM+VID OVERWEIGHT VEHICLE DATA

SELECTION OF NON-COMPLIANT

COMPANIES

PREVENTATIVE VISIT

COMPANY NON-COMPLIANT

PRO-ACTIVE ENFORCEMENT

COMPANY OK

MONITORING TWO MONTHS

MONITORING INDEFINITELY

COMPANY UNWILLING

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


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


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

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-2,5

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-1,5

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Str

ain

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Static

Dynamic


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


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



Bridge WIM System

In-road WIM System

AND/OR

DSRC

Camera/OCR

Computer Interface/Software

Weight/Axle Sensors(X Weight Accuracy)


Voltage/Axle Sensors(X Weight Accuracy)

IMPLEMENTATION


RESOURCE SCHEDULING/PREVENTATIVE CONTACTS



Bridge WIM System

In-road WIM System

AND/OR

DSRC

Camera/OCR

Database

DSRC

Camera/OCR









IMPLEMENTATION


RESOURCE SCHEDULING/PREVENTATIVE CONTACTS

DIRECT ENFORCEMENT



Bridge WIM System

In-road WIM System

AND/OR

Database

DSRC

Camera/OCR

Database

DSRC

Camera/OCR

DSRC

Camera/OCR






Weight/Axle Sensors(Y 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

QUESTIONS

Documents

COMMERCIAL MOTOR VEHICLE WEIGHT ENFORCEMENT. CURRENT CHALLENGES Significant Growth in CMV Traffic Increased congestion and delay Demand for larger and