yes 3rd line b/w JBP-MML is very much needed to cater future rush of BTC/G bound trains till MML and by the time NIR-BTC section will be completed and open for traffic this 3rd line can be built and once JBP-BTC-G route will be fully open then more frieght traffic along with passenger trains traffic will increase due to short route towards south and SECR so WCR/SECR shud construct 3rd line as soon as possible