Hello mr. Anniyan...good days...i write you from konya municipality / Türkiye...im working here in infrastructure departmant.i need your helping about utility ducts....i have to prepare a project for underground lines. you know in normally the telephone,the electric,gas,water, sewer etc.. lines are working seperate. but i think so you know a system these are into flow in a one line at under the way "utility duct". i think so you dont damage to asphalt road offen. Can you tell me some data (photos,drawings or etc...) about your underground lines system please? i can connect with you with telephone or e-mail. i wait your answer as soon as... thanks very much for your care... have a nice day... nevzat sönmez... email : nvztsnmz@hotmail.com