supply, installation, testing and commissioning of multi section digital axle counter ( msdac ) for automatic signalling in dual detection in connection with automatic signalling works complete with all accessories, track device and cards viz. axle detector, track side electronics / dac field units, central evaluator ( central evaluator unit should be housed in a pre-fabricated rack to be supplied along with the system ) , reset unit, final track clearance relay for each track section, event logger & diagnostic terminal etc. as per rdso specification no. rdso / spn / 176 / 2013, ver.3.0 or latest