ABSTRACT
Evidence suggests that some trains are exceeding permanent (PSRs), temporary (TSRs) and emergency (ESRs) speed restrictions. The scale of the problem is unknown but recent checks in association with Adjacent Line Open (ALO) working have identified that the occurrences might be higher than previously thought. The reasons why drivers may be exceeding the required speed limits are unclear. Without a clearer understanding of the problem it is difficult to develop and implement effective mitigations to prevent occurrences of over speeds.
