Provision Of Electronic Interlocking Signalling (both Indoor And Outdoor) And Telecommunication Arrangements At Chennai Central(mas) Yard In Connection With 1)replacement Of Existing Rri With Ei (indoor) To Interface With Modern Train Control System, 2)replacement Of Existing Signalling Arrangements (outdoor), 3)proposed Yard Improvement To Rectify Forced/defective Layout, 4)provision Of Multi Section Digital Axle Counter(msdac) In Parallel With Existing Dc Track Circuits In View Of Yard Improvement, 5)elimination Of Diamond Crossing, 6)proposed Platform Extension Of 1 & 2 To Accommodate 24 Rack Capacity And Allied Yard Modification Works At Mas Yard & 7) Alteration To Existing Electronic Interlocking Signalling Arrangements At Chennai Central-suburban (mmc) In Connection With Provision Of Stabling Lines For Emu/coaching Stock Salt Cotaurs Area.