Election results In 1971, Hahlweg was the
SPD's first candidate for the office of Lord Mayor of Erlangen, losing out to
Heinrich Lades with 48.1% of the votes. In the re-election, which became necessary one year later due to the territorial reform in Bavaria, he clearly won with 56.4% against Lades. At the age of 37, he was the youngest Lord Mayor of Bavaria when he took office. In the Mayor elections of 1978 (57.9 percent against Gerd Lohwasser (
CSU), among others), 1984 (59.4 percent against Gerd Lohwasser among others) and 1990 (57.4 percent against Joachim Herrmann among others) Hahlweg was confirmed in all cases in the first ballot. In the 1996 mayoral election, Hahlweg did not stand for re-election and resigned from office on 30 April 1996.
Siegfried Balleis (CSU) was elected as his successor.
Environmental policy Dietmar Hahlweg's "conviction of the equivalence of ecology and economy" became a trademark of his politics. This led to an environmentally oriented urban development with environmentally friendly transport policy and landscape and garden planning. Above all, the consistent promotion of
utility cycling earned Erlangen the reputation of a bicycle city. But also other measures of Dietmar Hahlweg, such as the modernisation of the sewage treatment plant, the expansion of the district heating and natural gas networks and the direct feeding of solar power into the network of the municipal utilities, led to Erlangen's inclusion in the UN list of honour "Global 500" and to the award of the title "Federal Capital for Nature and Environmental Protection" by the
Environmental Action Germany both in 1990 and 1991.
Ostpolitik The Social Democrat Hahlweg also endeavoured to support
Willy Brandt's
Ostpolitik at local level. This included events such as "Encounter with Poland" (1976) or the start of negotiations on a town twinning with
Vladimir in the then Soviet Union. The twinning negotiations led to success in 1987, as did the negotiations with Jena. and its representatives in the
European Committee of the Regions. ==Awards==