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Naeimi, M. (author), Li, Z. (author), Dollevoet, R.P.B.J. (author)This study investigates the angles θ<sub>1</sub>, θ<sub>2</sub>, and θ<sub>3</sub> that squat crack faces form with respect to three orthogonal planes: the rail top, the longitudinal-vertical cross-section and the lateral-vertical cross-section. Rail samples with squats of various severities are obtained from the field. Their three...journal article 2020