WIT Press


Risk-based Inspection On Highway Assets With Category 2 Defects



Price

Free (open access)

Paper DOI

10.2495/SAFE-V6-N2-372-382

Volume

Volume 6 (2016), Issue 2

Pages

10

Page Range

372 - 382

Author(s)

E.O. EKPIWHRE, K.F. TEE, S.A. AGHAGBA & K. BISHOP

Abstract

This paper presents a study piloted on highway assets Category 2 defects. Imminent hazards on high-way road networks are significantly accelerated by structural deterioration of highway infrastructures. The inspection and maintenance strategy for highway infrastructure requires continuous improvements to reduce high occurrence of defective highway assets. Combined risk-based inspection (RBI) and stochastic (STOC) techniques is considered in this investigation to give an in-depth understanding of highway asset maintenance response. Appropriate data information is extracted from Network Maintenance Management System and complementary information elicited from maintenance experts as well as recommended standards. Safety inspections piloted within the period of 5 years is evaluated using the projected RBI-STOC approach. The RBI incorporates the consequences and likelihood of the defects and the combined STOC techniques utilised defines the actual maintenance interval operated. The RBI-STOC approach proposes reclassification of highway asset defect repair intervals, appropriate maintenance task response and efficient maintenance prioritisation of highway assets in equivalence with contribution to system average mean time to repair and downtime.

Keywords

category 2 defects, probability distribution, risk-based highway assets management, risk-based inspections, safety inspection