increased from about 60 kph (37 mph) to over 100 kph (62 mph). A second possible reason for the increasing number of accidents was the increase in the elephant
population of this region; the population more than doubled or even tripled here
when 150 elephants were reported in 1980 from this region (Roy 2010).
Fig. 10.6 Maps estimating the spatial variation in the risk of collision of elephants with trains
along the railway track in northern West Bengal based on point densities (susceptibility map,
upper panel a) and kernel densities (lower panel b)
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M. Roy and R. Sukumar