Due to engineering work between Kavarapettai and Gummidipundi stations on the Chennai Central – Gudur section from 13.4.2012 to 16.4.2012 the following changes are made.   Train No.13351 Dhanbad – Alleppay Bokaro Steel City Express will be regulated at Elavur around 70 minutes. Train No.12839 Howrah – Chennai Central Mail will be regulated at Elavur around 25 minutes. Train No.42045 MMC – Gummidipoondi local leaving MMC at 23.15 hrs. and Train No.42001 MMC - Gummidipoondi local leaving MMC at 00.15 hrs. will be partially cancelled betweenPonneri and Gummidipoondi. Train No.42002 Gummidipoondi – MMC local leaving Gummidipoondi at 02.45 hrs. will be partially cancelled between Gummidipoondi and Ponneri.