The detailed inspections identify specific deficiencies associated with critical safety/high value assets and provide an evaluation used to quantify material and resource needs based on the number and type of these deficiencies. It also provides the capability to track the deterioration of a specific set of assets that can be used for identifying major maintenance needs.

Level 1 inspections are routine inspections which are used to check the general serviceability of a structure and to ensure the safety of road users.

Level 2 inspections are condition inspections and are used to assess the condition of struc­ tures and their components.

Level 3 inspections are detailed engineering investigations and assessments of individual structures which are conducted as required. Level 3 inspections are conducted for the follow­ Ing reasons:

• To investigate a significant defect identified during a Level 1 or 2 inspection or other source
• To prepare a detailed report on the condition and/or load carrying capacity of a struc­ ture
• To prepare a detailed report on potential candidate structures for rehabilitation, strengthening, widening or replacement
• To prepare a detailed assessment of the adequacy of a structure for use by current or proposed future heavy vehicles
• As part of a more general investigation into the performance or condition of individual structures, classes of structures, structural components and materials in different en­ vironments or subjected to different levels of loading

Monitor inspections are a programmed Level 3 inspection of specific classes of structure in the Monitor program.

Complex structures are a category of structure for which the standard Level 2 inspection does not provide sufficient information to enable assessment of the condition of bridge compo­ nents for the whole of the bridge. Structures may be included in this category due to their structural form, the need for special expertise or because of difficult access. Structures in this category require a structure-specific management plan.

Structures that require special access or other requirements beyond the scope of Level 1 and 2 inspections may be subjected to a Level 3 inspection or may be treated as a Complex structure.

Level 1 & Level 2 inspections are carried out by MRI personnel, while level 3 inspection will be joint ly conducted with Maurer - Middle East.