Two weeks after seven wild elephants were killed by a speeding train in Bengal's Jalpaiguri district, three well-known environment protection groups have successfully carried out demonstration of an imported speed-detection gun on trains in an elephant corridor near Guwahati. The demonstration showed how the gun would help enforce speed restrictions. Rathin Barman of Wildlife Trust of India (WTI) said the speed-gun, once used in sections of railway tracks that pass through elephant corridors of the country, would help address the human errors caused by train drivers that kill elephants. The demonstration was carried out on a railway track that passes through Deeepor Beel, a Ramsar Site near Guwahati on Wednesday, where elephants come down in herds from the adjoining Rani reserved forest. This stretch of the Guwahati-Goalpara railway track has also witnessed death of several elephants despite speed restrictions imposed by the Northeast Frontier Railways. Another NGO, People for the Ethical Treatment of Animals (PETA) India, has appealed to Environment Minister Jairam Ramesh and Railway Minister Mamata Banerjee for widespread use of the speed detector equipment to force trains throughout the country to slow down in areas that are heavily populated with wildlife.