Pedro Rodrigues

Instituto Superior Técnico

The degradation of track geometry is a very complex phenomenon that has typically been analysed considering global quality indicators. In this paper, the influence of ballast and track substructure on its geometric degradation is analysed by modelling the degradation rates of more than 17,400 local defects of longitudinal levelling, alignment, and...

The geometric recovery achieved with tamping is affected by several factors, including maintenance history, ballast condition, type of tamping, age and configuration of track components, operational speeds, and human factors. In this paper, data from 2,819 defects of longitudinal levelling are analysed considering 66,892 km of inspections carried o...

The proper scheduling of track maintenance and renewal operations is dependent on the accuracy of predictive maintenance outputs which, in turn, rely on the appropriate modelling of the track geometry degradation process. This paper explores the incidence and representativeness of the alerts generated due to local defects of track geometry and the...