| Lagerlunda rail accident | |
| Coordinates: | 58.402°N 15.483°W |
| Date: | November 15, 1875 |
| Time: | circa 01:11 |
| Location: | Kapellån, between Malmslätt and Bankeberg |
| Country: | Sweden |
| Line: | Eastern Main Line |
| Type: | Head-on collision |
| Trains: | 2 |
| Deaths: | 9 |
| Injuries: | 3 |
The Lagerlunda rail accident occurred in the early hours of 15 November 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.[1] [2]