The preliminary investigation has revealed it could've been a fault in the electrical system which are installed to avoid direct head collisions.— installed to avoid direct head collisions. . , ,, collisions. that is essentially, if the train is _ collisions. that is essentially, if the train is running _ collisions. that is essentially, if the train is running on - collisions. that is essentially, if the train is running on one - collisions. that is essentially, ifj the train is running on one track collisions. that is essentially, if i the train is running on one track it doesn't divert on...