NHAI invites Independent Engineer services for Operation and Maintenance of Gorakhpur-Kasia- UP/Bihar border section of NH-228 from km. 279.800 to km. 360.915 (new ch. Km. 285.002 to km. 366.117) (Total Length = 81.115 km.) on OMT basis toll collection of Toll Plaza at km. 255.200 (New ch. Km 256.500) (For Toll collection of BOT Annuity reach from km. 251.700 to km. 279.800 (new Ch. km. 252.860 to km. 285.215) of Gorakhpur Bypass of NH-28 in the state of Uttar Pradesh on OMT basis.