The map below displays, for all countries for which data is available, the routine monitoring intervals in months.
Routine monitoring serves to determine the functionality of infrastructures and the road safety of roadways and equipment. It covers the detection of gross damage and conspicuous changes, as far as they are visible from a vehicle when driving over infrastructures.
Maintenance strategy and limits
Routine monitoring can be seen primarily as relevant for corrective maintenance and is intended to eliminate large damage and conspicuous changes at an early stage, whereby in a broader sense the entire process can be counted as a preventive maintenance strategy – this means, for example, that minor elements or components that are not so important for the load capacity of a structure are replaced immediately, and these replacements have a significant influence on the longer system load capacity. These immediate corrections are generally carried out in a worse condition class.
In general, routine monitoring is processed during inspection trips by the roadway service employees or persons of equivalent competence, but at least every couple of months for structures in the course of roads and streets where no roadway service is established. Routine monitoring is carried out on all structures to be maintained from the traffic level for visible defects and changes, as far as they are visible when driving from the vehicle, such as:
- Unusual changes to the structure,
- Damage to the road surface including lateral beams,
- Damage to equipment such as transition structures, railings, guard rails, noise protection devices, snow and spray protection devices,
- Damage to drainage facilities,
- Damage to embankments,
- Damage to any existing object-related traffic signs and information signs.
In addition, attention should be paid to impact damage, damage to ceiling and wall coverings, parts hanging down and damp spots on the underside. No written record of ongoing monitoring of individual structures will be made from the inspection trips. Any damage or conspicuous changes found shall be reported in writing to the person responsible for maintenance. Insofar as they affect traffic safety, the necessary measures are to be taken immediately.