Risk-based inspection on highway assets with category 2 defects

Abstract

This paper presents a study piloted on highway assets Category 2 defects. Imminent hazards on highway 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.

Reliability based maintenance methodology for sustainable transport asset management

“…Maintenance, which is a core function for sustaining long-term profitability of assets by organizations, is defined as a combination of all actions with intent to restore the asset to its original state or a state where it can perform its required function. This report devices a novel approach using systematic knowledge of the basics of reliability [7], [8], [9], risk [10], [11], deterioration [12], [13] and cost strategies [3], [14] and models embedded in qualitative and quantitative assessment methods as it is shown in Fig. 2 recognizing that algorithms support effective optimizations of systems [15], [16].…”

“…4 evaluates the RBI assessment to enable a stochastic application to pilot its outcomes. The approach overcomes the precincts of inherent risk practices for defects on highway assets offering a systematic and coherent way to manage the assets [22] as it is applied in case study [10].…”

“…The mean (µ) and standard deviation (ı) generated from MTTR interval from the sampled safety inspection data set is sampled to derive the best fit PDF trend of each defect category. The best fit PDF is generated using the most precise interval ȝ and ı, predicting the most current MTTR interval for the various defect categories [10]. Fig.…”

Reliability and Inspection Modelling of Railway Signalling Systems

“…For proper maintenance, inspection at a proper time interval is required. Inspections form an important part of the integrity management process as a means of monitoring the performance of signalling systems to ensure their safety and serviceability [5][6][7]. Special attention to maintenance and inspection activities and logistics support is required to be taken to improve the reliability and maintainability of the signalling system [8][9][10][11].…”

A new computational method for structural reliability with Big Data

“…The application of big data in traffic reliability operation has been put forward. It is believed that the new opportunities will be brought to innovation in traffic management and decision-making paradigm [4]. The data quality and data characteristics were analyzed, and the highway reliability estimation methods have been proposed [3,23,21].…”