The new, tough and low maintenance Diamond Crossing custom made for Nagpur. All the old rotten wooden sleepers have been replaced with heavy concrete sleepers specially made for turnouts. The check rails are also extra thick on all sides and are firmly mounted on the sleepers. The passenger mainlines towards Howrah (Left upper to Right lower) feature continuous rails now and so are suited for higher than 30 kph speeds over the crossing. Nagpur - Diamond Crossing. 2005-11-10.