Independent Engineer Services during Operation and Maintenance period for 4- laned stretch from “Km. 308. 000 ( Armur ) to Km. 367. 000 ( Adloor Yellareddy ) on BOT ( Toll ) basis ( Package No. NS2/ BOT/ AP- 1 ) and Km. 367. 000 ( Adloor Yellareddy ) to Km. 454. 000 ( Kalakallu ) on BOT ( Annuity ) basis ( Package No. NS2/ BOT/ AP- 2 ) ” on NagpurHyderabad section of NH- 44 in the State of Telangana under North South Corridor ( NHDP Phase- II )