1. BRIDGE INFRASTRUCTURE PRESERVATION

2. 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

3. CURRENT CHALLENGES Bridge Infrastructure Deterioration 72,500 U.S. bridges “structurally deficient” $65.3 billion repair estimate Inexact methods to reduce, refine, prioritize actions – Uncertainties in traffic loading – Uncertainties in bridge response

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

5. EUROPEAN APPROACH Technology-based Policies/Procedures Structural/safety assessment – Slovenia, France enhance the accuracy of bridge safety conclusions through direct measurements Load testing – Slovenia uses “soft” load testing

6. 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

7. 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

8. 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

9. IMPLEMENTATION STRUCTURAL ASSESSMENTS Archived Records Database Bridge WIM System Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Database

10. IMPLEMENTATION STRUCTURAL ASSESSMENTS SAFETY ASSESSMENTS Archived Records Database Bridge WIM System Database Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Database

11. IMPLEMENTATION STRUCTURAL ASSESSMENTS SAFETY ASSESSMENTSLOAD TESTING Archived Records Database Bridge WIM System Database Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy) Database Computer Interface/Software Voltage/Axle Sensors (X Weight Accuracy)

12. BENEFITS

13. FUNCTIONAL INTERFACE

14. QUESTIONS