Professional and Honorary Societies

6.1           Association of Transportation Engineers and Technicians of Serbia, Belgrade, Serbia ‑ Member (1959-1995).

6.2           International Association of Public Transport – UITP, Brussels, Belgium ‑ Personal Associate Member (1962-present).  Member of the Editorial Board of the  Public Transport International journal.

6.3           Institute of Transportation Engineers – ITE, Washington ‑ Life Member (joined in 1965).  Member of three technical committees (1968, 1970, 1980); Assistant Chairman, Planning Applications Division (1971‑72).

6.4           Chi Epsilon (1964), Tau Beta Pi (2006).

6.5           Operations Research Society of America – ORSA/INFORMS, Member (1967‑80); Transportation Science Section Council Member (1969‑70).

6.6           Transportation Research Board ‑ TRB, Member since 1967; Representative of the University of Pennsylvania (1968-2010).  Chairman of the Rail Transit Committee 1977‑83.  One of the initiators of the Light Rail Transit and Commuter Rail Committees; presently member of the Committees on Intermodal Transfer Facilities, Intercity Passenger Rail, and Rail Transit. Emeritus Member of two committees.

6.7           American Society of Civil Engineers – ASCE, Washington ‑ Member (1971-present).

6.8           Transportation Subcommittee, Mayor’s Science and Technology Advisory Committee, Philadelphia, Vice‑Chairman (1972‑80).