
Professor Retzko was head of the Department of Transport Planning and Traffic Engineering at the Technische Universität Darmstadt from 1966 until his retirement in 1997.
- Member of numerous appointment committees and other committees of the Technische Hochschule Darmstadt and of appointment committees at the universities of Kaiserslautern, Kassel, Weimar and Zurich.
- Supervision of 2 habilitation procedures and 37 doctoral procedures, co-supervision of 43 doctoral procedures
- 206 publications
- Congress, study and lecture tours through European countries as well as Argentina (1980), Canada (1981), China (1985, 1995, 1999, 2004, 2005, 2006 (twice), 2007) Colombia (1980), Hong Kong (1992), Israel (1978, 1989, 1991, 1994, 1997), Japan (1967, 1970, 1972, 1977, 1990, 1993, 1994, 1999), Korea (1992), Mexico (1975, 1980), USA (1969, 1976, 1987, 1993) and Vietnam (1998, 2000, 2001, 2002, 2004 twice, 2005).
- Participation in numerous national and international professional events (also as rapporteur and general rapporteur).
Member of numerous organisations, for example
- German Academy for Urban and Regional Planning
- German Road Safety Council (until 1992)
- German Transport Science Society
- Research Society for Road and Traffic Engineering
- (Member of various working committees, in particular long-standing chair of the working committees “Traffic Signal Systems” and “Traffic in Urban Development” and “Questions of Principle in Transport Planning”)
- Advisory board of the Association of German Transport Companies (VDV, formerly VÖV) (until 1997)
- Association of Road and Traffic Engineers in Hesse (founding member, 1967)
Focal points of the scientific work:
- Systematic research into traffic flow at road junctions without traffic lights (own studies and dissertations by staff).
- fundamental studies on signal programme calculation for road junctions with traffic lights (own studies and dissertations by staff), the results of which were partly incorporated into the relevant technical regulations
- Studies on the process of urban and regional traffic planning (own considerations and studies as well as dissertations by staff members), the results of which were partly incorporated into technical regulations
- interdisciplinary studies on urban and regional transport problems
- professional activities
- outside the Technical University of Darmstadt, consulting engineer for traffic planning and traffic engineering (from 1973 to 1980 in the engineering firm BGS, Frankfurt am Main, and from 1980 to 1998 in the planning office RETZKO + TOPP, Darmstadt/ Dresden/Düsseldorf, managed in partnership)
1928 | geboren in Hagen/Westfalen | ||||
1949 | Abitur in Lübbecke/Westfalen | ||||
1955 | Dipl.-Ing. (Bauingenieurwesen, Technische Hochschule Hannover) | ||||
1955 … 1961 | wissenschaftlicher Mitarbeiter bzw. wissenschaftlicher Assistent am Lehrstuhl und Institut für Verkehrswirtschaft, Straßenwesen und Städtebau der Technischen Hochschule Hannover | ||||
1961 | Dr.-Ing. | ||||
1961 … 1964 |
städt. Baurat bzw. Oberbaurat im Stadtplanungsamt Nürnberg (Tätigkeitsbereiche: Planung, Entwurf und Betrieb von städtischen Verkehrsanlagen, insbesondere von Stadtautobahnen und sonstigen Stadtstraßen; U-Bahn-Planung; Lichtsignaltechnik; Unfalluntersuchungen) daneben von 1961 – 1963 Lehraufträge in der Fakultät für Bauwesen der Technischen Hochschule Hannover |
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1964 … 1966 | Referent für Bauingenieurwesen im Städtebau im Niedersächsischen Sozialministerium in Hannover (Tätigkeitsbereich: Bauingenieur-Fragen in den Städten und Dörfern des Landes Niedersachsen) | ||||
1966 |
Berufung auf den ordentlichen Lehrstuhl für Verkehrsplanung und Verkehrstechnik in der Fakultät für Bauingenieurwesen der Technischen Hochschule Darmstadt und Bestellung zum Direktor des gleichnamigen Instituts (Forschung und Lehre über Methoden und Verfahren der Verkehrsplanung und Verkehrstechnik, insbesondere Straßenverkehrstechnik) |
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1971 … 1972 | Dekan des Fachbereichs Wasser und Verkehr | ||||
1972 | Berufung zum Mitglied des Deutschen Rates für Stadtentwicklung | ||||
1973 | Verleihung des “Abzeichens mit dem goldenen Kranz” des Ungarischen Verkehrswissenschaftlichen Vereins | ||||
seit 1974 | wiederholt Geschäftsführender Direktor des Instituts für Verkehr | ||||
1975 … 1977 | Mitglied des Konvents der Technischen Hochschule Darmstadt | ||||
1979 … 1980 | Dekan des Fachbereichs Wasser und Verkehr | ||||
1984 | Ehrenmitglied des Ungarischen Verkehrswissenschaftlichen Vereins | ||||
1990 … 1992 | Dekan des Fachbereichs Wasser und Verkehr | ||||
1991 … 1996 |
Stellv. Geschäftsführender Direktor des Zentrums für Interdisziplinäre Technikforschung (ZIT) der Technischen Hochschule Darmstadt (Mitglied des Direktoriums seit Gründung des ZIT, 1987) |
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1995 | Verleihung der ERASMUS-KITTLER-MEDAILLE durch die Technische Hochschule Darmstadt | ||||
1996 | Verleihung der Ehrendoktorwürde Dr.-Ing. E.h. durch die Technische Universität Dresden | ||||
1997 | Emeritierung | ||||
2002 | Verleihung des Verdienstkreuzes 1. Klasse des Verdienstordens der Bundesrepublik Deutschland | ||||
2003 | Verleihung der Medaille “Für Verdienste im Bildungswesen” der Sozialistischen Republik Vietnam | ||||
2006 | Verleihung der Titels „Advisory Professor“ durch die Tongji University Shanghai, China | ||||
2014 | verstorben in Darmstadt |
✡ November 27, 1928
✝ November 19, 2014
RETZKO studied civil engineering at the Hannover University of Technology until 1955. From 1955 to 1961 he served as a scientific assistant at the Institute of Traffic and Transport Economy, Highway Engineering and Urban Planning at that university. In 1961, he received his doctoral degree. In the early sixties, RETZKO was traffic and transport engineer in the town planning office of the City of Nürnberg. His fields of activities were planning, design and operation of urban traffic and transport facilities, especially streets, motorways, parking and public transport; traffic signal settings; accidents research. Thereafter he became an official in the department of the Federal State of Lower Saxony, Hannover. Here he served as expert for civil engineering in urban planning and was responsible for all civil engineering projects in the cities and towns of Lower Saxony. Since 1966, RETZKO has been professor for traffic and transport engineering at the Darmstadt University of Technology, where he has been researching and teaching especially on traffic and transport planning methods, on traffic and transport theories, and on planning, design and operation of traffic and transport facilities. He served three times as Dean of the Faculty of Civil Engineering, and he was a member or/and chairman of many committees of the university.
RETZKO is member of many national and international organizations. He became Member of Honour of the Hungarian Association for Traffic and Transport Science. He made congress, study and lecturing tours to European countries, and to Argentina (1980), Canada (1981), China (1985, 1995, 1999, 2004, 2005, 2006 twice, 2007), Colombia (1980), Hong Kong (1992), Israel (1978, 1989, 1991, 1994, 1997), Japan (1967, 1970, 1972, 1977, 1990, 1993, 1994, 1999), Korea (1992), Mexico (1975, 1980), USA (1969, 1976, 1987, 1993) and Vietnam (1998, 2000, 2001, 2002, 2004 twice, 2005).
He participated in many national and international congresses (sometimes as general reporter and as national reporter).
RETZKO published 206 technical papers and books.
Outside his university, RETZKO is consulting federal and state ministries, regional authorities, cities and other public or private institutions. He established many projects, especially on urban traffic and transport planning.
RETZKO received several honours: in 1973 a gold medal by the Hungarian Association for Traffic and Transport Science (“Abzeichen mit dem goldenen Kranz”), in 1984 the Honorary Membership of this association, in 1995 a merit medal of his university (“Erasmus-Kittler-Medaille”), in 1996 the Honorary Doctor Degree by the Dresden University of Technology, in 2002 the German First Class Merit Medal (“Verdienstkreuz 1. Klasse des Verdienstordens der Bundesrepublik Deutschland”), in 2003 the “Medal for Merits in Educational Matters” by the Sozialistic Republic of Vietnam and in 2006 the title of “Advisory Professor” by Tongji University Shanghai, China.
Darmstadt, June 2007

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