Effective, fair and sustainable road management requires objective and up to date information. Advances in a range of sensing technologies and information processing have built up the potential for implementing new monitoring techniques that deliver key information for road management. Many current monitoring techniques suffer from low cost-effectiveness, restricted spatial coverage, traffic disruption, poor reliability, poor understanding of their capability, subjective interpretation, poor assessment of defects affecting functionality, and restricted versatility. For this reason many road and bridge owners/operators make limited use of current monitoring systems and avoid some of the recent developments. The practice of using monitoring techniques also differs between countries. As a result management decisions are sometimes not optimal, causing higher costs, lower performance, inconvenience (traffic delays) and additional costs and external effects to society.
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