Driver detection and recognition of lineside signals and signs at different approach speeds |
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Authors: | Guangyan Li W Ian Hamilton Ged Morrisroe Theresa Clarke |
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Affiliation: | (1) Human Engineering Limited, Shore House, 68 Westbury Hill, Westbury-on-Trym, BS9 3AA Bristol, UK;(2) Network Rail, 40 Melton Street, NW1 2EE London, UK |
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Abstract: | A study was carried out using simulation to investigate driver responses to lineside signals and signs at various approach
speeds. The objectives of the study were: (1) to find out whether train speed would significantly affect signal/sign reading;
(2) to examine at which point certain types of signs or signals could be detected or recognised, and (3) to determine a speed
cut-off level above which certain types of signs or signals are no longer recognisable or detectable. Fifty-seven train drivers
from 12 Train Operating Companies in the UK participated in the trials. Twenty different types of lineside signs and ten types
of signals were tested under six different approach speeds ranging from 100 to 350 km/h (62–218 mph). Driver performance measures
were ‘time remaining to the signal/sign’ at the point of detection or recognition, and reading error rate. The results showed
a significant influence of train speed on driver responses to lineside signals/signs and demonstrated a non-linear relationship
between driver responses to signals/signs and approach speed. This has been used to estimate a maximum approach speed limit
within which a specific signal or sign can be correctly detected or recognised. The findings and implications of the study
are discussed in the paper. |
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Keywords: | Railway signals Railway signs Train speed Signal sighting Driver response |
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