3360 x 3359 px | 28,4 x 28,4 cm | 11,2 x 11,2 inches | 300dpi
Date de la prise de vue:
1 octobre 1997
Lieu:
Kent, England, UK.
Informations supplémentaires:
Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.
Train drivers are compelled by regulations to sound a warning with their horn if they see anybody on or near the tracks. Rail workers are expected to acknowledge this warning by raising an arm and moving, if necessary, to a position of safety until the the train has passed. If the first warning is ignored and an urgent second warning goes unacknowledged, the driver must halt the train. The safest way for work teams to carry out repairs or maintenance on railways is to separate workers from trains by arranging for all the lines to be blocked and the power to be switched off. Unfortunately, such ‘green zone’ working is rarely possible (except for major projects) because it would cause unacceptable cancellations and delays to busy rail networks. Therefore, partial blockades are set up which allow trains to run on some lines whilst others are blocked or ‘red zone’ working which involves warning workers of approaching trains in time for them to get clear of the line and into 'positions of safety' well before the train arrives. ‘Red zone’ working requires very stringent safety systems to be put in place.
