Bridge protection thanks to preventive monitoring

Bridge protection

Bridges are sensitive components of the traffic infrastructure, and their lifetimes are limited. Traffic volumes are soaring all over the world, and many bridge structures are in the process of aging – two factors that combine to create a hazardous situation. Weigh In Motion systems from Kistler are the solution of first choice for both bridge monitoring and bridge protection: they supply reliable data about the actual loads on bridges to schedule maintenance accurately or alternatively WIM can detect overloaded vehicles before passing the bridge and restrict access.

Overall, Kistler offers three approaches to protecting bridges

Before a bridge is identified as critical:

  • Traffic data collection with Weigh In Motion: traffic loads have a direct impact on bridge lifetimes – so traffic load analysis is an important tool for calculating a bridge's current life expectancy.
  • Structural health monitoring: strain gauge sensors, accelerometers and many more technologies from Kistler are optimal solutions for monitoring changes in a bridge's structural behavior – so faults are detected at an early stage.

Once a bridge is identified as being critical:

  • Preselection of overloaded/heavy vehicles with Weigh In Motion: identified trucks are advised to a detour route

Benefits of bridge protection with measuring technologies by Kistler:

  • Longer bridge lifetimes: overloaded vehicles are prevented from crossing the bridge
  • Reduced risk: early detection and continuous monitoring of critical structures
  • Deep insights into bridge and pavement behavior: diverse range of technologies to measure existing and planned structures
Bridge protection can be provided by traffic monitoring systems installed directly before or on bridges.
Bridge protection plays a key role in protecting the transport infrastructure. Systems for automatic weight control (Weigh in Motion) are suitable for use before bridges. On the bridge itself, systems such as KiTraffic Statistics and selectively placed sensor technology from Kistler for continuous condition monitoring are used.
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  • Date of installation: May 2016
  • Location: E80, Istanbul – Izmir
  • Application: traffic data collection, staggered layout, 2 sensors per lane (Type 9195G), with Kistler WIM Data Logger
  • Operation: the weight of road vehicles approaching or transiting the bridge is monitored. This generates a record of the traffic load history for the bridge, including time of passage of first axle as well as vehicle classification, weight, length and speed


  • Certified complete systems including data processing and evaluation
  • Precise, automatic recording of traffic data while vehicles are traveling
  • Preselection and access restriction for overloaded vehicles
  • Weight-based toll collection and usage-based maintenance