Lagerlunda rail accident
The Lagerlunda rail accident occurred in the early hours of November 15, 1875 about 8 km west of Linköping in Östergötland, Sweden. Unclear signalling between a station master and a steam engine driver led to a train leaving the station although another train was approaching on the single line track. 9 people were killed in the head-on collision shortly after. The station master was sentenced to 6 months of prison.
A contemporary investigation by Swedish ophthalmologist Frithiof Holmgren suggested that color blindness on the part of the driver could have contributed to the accident, which prompted the introduction of mandatory color-vision screening of railroad personnel. However, more recent analyses dispute color blindness as the main cause of the accident.
- Frey, F. G. (1975). "A railway accident a hundred years ago as reason for systematic testing of colour vision (author's transl)". Klinische Monatsblatter fur Augenheilkunde 167 (1): 125–127. PMID 1104986.
- Mollon, J. D.; Cavonius, L. R. (2012). "The Lagerlunda Collision and the Introduction of Color Vision Testing". Survey of Ophthalmology 57 (2): 178–194. doi:10.1016/j.survophthal.2011.10.003. PMID 22301271.
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