Railway Minister Dinesh Trivedi is likely to spell out a blue print for upgrading signalling and telecommunication system to prevent accidents in the upcoming Rail Budget despite financial constraints. Besides, the Rail Budget will have proposals for state-of-the-art coach manufacturing units in Karnataka and Gujarat. Railways, which has sought Rs 50,000 crore from the finance ministry as gross budgetary support has got only Rs 25,000 crore for the next fiscal from the central kitty.