few yrs back i hd heard of DETONATORS...mild explosives...stuck on tracks that would burst when loco wheels moved over it...a temporary soln to fog...what happedned to detonators? any other mechanism to combat fog? like giant wheels near tracks at regular intervals,etc? ir loses crores of rupees due to fog every winter. add to it the inconvenience caused. is the issue only in india? how do other countries handle fog ?