MTech in Transportation might not be a popular subject but it can land you in some jobs of Civil Engineering and Automobile Engineering. An MTech degree will help you to gain further knowledge about the subject if you, later on, want to pursue a career in Teaching or Research. In the 2019 placement drive, more than 89 companies have visited IIT Bhubaneswar for placements. The average salary package offered to an MTech graduate was 11 lakhs per annum.
Construction Technology and Management is a closely related field to Civil Engineering. After completing MTech you can further get into research and development about the subject. Also, students from NIT Surathkal have received an average salary package of 7 lakhs per annum by recruiting companies like Alliance International, G. Gheewala, ABC consultants, Shella Consultants, Delta recruitment, R.K. International, MM Enterprises, International Manpower resources, Randstad India, Dynamic Group, Hector & Streak Consulting Pvt. Ltd., etc. for Real Estate, Infrastructure, Projects, and oil and gas sectors.
Both subjects are closely related to the Civil Engineering department, you can choose by your college preference, subject preference, ranks, etc. IIT Bhubaneswar would be a better choice due to its better placements and popularity among the professionals.