Yes they can speedup by 1.5hrs between vijaywada to Howrah. There is enough of time from Chennai Egmore to BZA and need not be given slack in Bza Vskp section. BZA VSKP 60 mins Vskp 810/30 HWH 2230. As HWH will not take before and 3 trains are in line from VsKp to HWH dep at Trichy should be delayed by 90mins to 1500 to reach Vskp at 910/30 HWH 2330.