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Bridge Safety Monitoring

European Union
Complete with results
Geo-spatial type
Infrastructure Node
Total project cost
€1 070 967
EU Contribution
€804 993
Project Acronym
STRIA Roadmaps
Infrastructure (INF)
Transport mode
Multimodal icon
Transport policies
Other specified
Transport sectors
Passenger transport,
Freight transport


Call for proposal
Link to CORDIS

Much of the world’s bridges are old and need to be periodically repaired or replaced. However, premature replacement wastes money and non-renewable resources. BridgeMon is led by three SMEs who are working to extend the lives of existing bridges. They will develop bridge monitoring technologies to prove they are safe and can be kept in service for longer, thus ensuring more sustainable road asset management.

A bridge is safe when the stresses due to traffic load are less than its resistance to that load. Bridge monitoring is gathering information about both sides of this inequality, traffic load and bridge resistance and the BridgeMon SEMs cover both. It is led by Cestel, a world leader in Bridge Weigh-in-Motion (WIM). Cestel have partnered with two SMEs that specialise in monitoring the resistance of bridges to load, one for the road sector and one for the railway sector.

The novel theory of Moving Force Identification (MFI) will be applied in bridge WIM system to increase accuracy considerably and extend it to other types of bridge. An advance on MFI will be used to extend WIM to railway bridges and to gain additional information on the resistance of bridges to load. MFI and other improvements will increase the accuracy of the truck weight data to Class A, i.e., to the point where 95% of results have errors of less than 5%, a level not available today with any WIM technology.

In the area of structural health monitoring BridgMon will develop and implement tools for improved bridges assessment, including modules to evaluate fatigue life of steel bridges and structural health of railway bridges, both combined with Bridge WIM (traffic loading).

The new technologies, coupled with partnership arrangements with Cestel, will give the other SMEs Unique Selling Points in the bridge resistance monitoring markets. The result gives a potential for massive growth in these SMEs in the coming 5 years, in both turnover and employment.


Parent Programmes
Institution Type
Public institution
Institution Name
European Commission
Type of funding
Public (EU)
Other Programme
SME-2012-1 Research for SMEs


New tools to improve safety assessment of road and rail bridges

An improvement in current bridge weigh-in-motion (WIM) techniques and algorithms to monitor bridge traffic loading and resistance could result in more efficient monitoring and more seamless land transport.

Evaluating bridge safety requires in-depth knowledge of traffic loads, as well as bridge resistance to that load. It is crucial to assess the safety particularly of ageing bridges that are close to the end of their life cycle and need replacing. However, this requires the proper tools to help bridge owners and managers decide on the best remedial measures and distribute their maintenance budget.

The EU-funded BRIDGEMON (Bridge safety monitoring) project developed tools that obtain more detailed information on the loading and resistance of a bridge. It worked on improving current bridge WIM technology, which calculates bridge loads from trucks crossing the bridge with highway speed. The project also developed a virtual monitoring technique to estimate the remaining fatigue life of steel bridges.

To achieve its aims, the project conducted field tests to validate the new bridge WIM algorithms, showing significant improvements in accurately estimating axle loads of heavy vehicles. Furthermore, it tested the new-improved virtual monitoring technique on a major steel bridge in the Netherlands, offering a more powerful tool to calculate fatigue damage.

The bridge WIM technology was then tailored to suit railway bridges as well, accurately calculating the weight of trains that passed over the bridges. This involved developing specific algorithms that could correctly pinpoint damage and fatigue in railway bridges.

Overall, BRIDGEMON was successful in achieving its aims, offering the project partners new ways to enhance their product and improve their competitiveness in the field of bridge monitoring. Most importantly, this stands to enhance bridge assessment and safety in Europe for both road transport and rail, pre-empting transport disruption and likely saving lives.


Lead Organisation
Cestel Cestni Inzeniring Doo
Spruha 32, 1236 Trzin, Slovenia
EU Contribution
€406 960
Partner Organisations
Roughan & O'donovan Limited
Arena Road Arena House, Sandyford, 18, Ireland
EU Contribution
Corner Stone International Sagl
VIA AI CROTT 5, 6702 CLARO, Switzerland
EU Contribution
€145 482
Zavod Za Gradbenistvo Slovenije
Organisation website
EU Contribution
Kalibra Investments B.V.
ROTTERDAMSEWEG 183 C, 2629 HD DELFT, Netherlands
Organisation website
EU Contribution
€49 454
Adaptronica Zoo Sp
Ul. Szpitalna 32, 05 092 Lomianki, Poland
EU Contribution
€203 098


Technology Theme
Condition monitoring
Structural health monitoring based on modelling
Development phase

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