Bridge Weigh-In-Motion Solution
Bridge-Based Weigh-In-Motion Technology
Bridge Weigh-In-Motion (B-WIM) systems measure vehicle weight by using the bridge structure itself as the weighing platform. Sensors installed beneath the bridge deck capture structural response as vehicles cross, allowing axle loads, gross vehicle weight, vehicle speed, and classification to be measured without disturbing normal traffic flow.
How the System Works
- Sensors are installed beneath the bridge deck without cutting the road surface.
- Structural response is used to calculate axle loads and gross vehicle weight.
- Vehicle speed, axle spacing, and classification are measured simultaneously.
- Suitable for a range of concrete and steel bridge structures.
System Specifications and Performance
| Parameter | Typical Capability |
|---|---|
| Measured Data | GVW, Axle Load, Axle Spacing, Speed, Vehicle Classification |
| Accuracy | COST 323 Class B(10) or Better* |
| Lane Coverage | Single or Multi-Lane |
| Installation | Permanent or Temporary |
| Bridge Types | Concrete and Steel Structures |
| Data Output | Local Storage, Dashboard or API |
*Project dependent. Specifications may vary by installation.
Applications and Standards Compliance
Bridge WIM systems support vehicle weight monitoring across transportation and infrastructure projects without interrupting traffic.
Typical Applications
- Overload screening and enforcement
- Bridge load assessment
- Traffic and axle load monitoring
- Weight-based tolling
- Long-term infrastructure studies
Supported Standards
- COST 323
- ASTM E1318
- OIML R134
System Integration and Data Connectivity
Bridge WIM solutions can be integrated with existing traffic and infrastructure monitoring systems to improve data collection and operational visibility.
- ANPR / LPR systems
- Structural Health Monitoring (SHM)
- Traffic counting and vehicle classification
- Traffic management platforms
- Web dashboards and API integration
- Historical data reporting
