Based on the railway network performance, Infrastructure Manager is obligated to define the Maintenance plan for railway infrastructure, which contains corresponding values for intervention limits and alert limits. This paper considers vehicle response to track excitation due to the rail defect (code 2202 according to defect classification). It is indicated that theoretical models and acceleration measurements could be used to assess the quality of track geometry and ride comfort. The importance of early detection of irregularities of superstructure and substructure was emphasized. Moreover, the importance of inspection and preventive maintenance on the modern railway infrastructure was considered. According to the previous, the authors recommend non-destructive methods for inspection and early detection of irregularities of railway infrastructure.
Rail defects due to the rolling contact fatigue have a significant place in the Handbook of Rail Defects in the framework of UIC Code 712 in 2002. The paper presents the system for coding and classification of rail defects according to UIC recommendation IRS 70712 in 2018. The presented classification does not cover all known defects due to the rolling contact fatigue (e.g. stud and belgrospi defects). It is recommended that Infrastructure Manager should supplement the Handbook of Rail Defects with the types of defects noticed on its railway network. The authors recommend information that should be included in the database of rail defects, in order to monitor the development of defects, taken measures and their efficiency, as well as to enable the exchange of statistical data on rail defects at the international level.
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