Deák Ferenc híd, Highway bridge in Budapest, Hungary.

The Deák Ferenc Bridge is Budapest's southernmost Danube crossing, carrying the M0 ring road and the E60, E71 and E75 routes. It consists of two parallel spans: the northern one, built 1987–1990, and the southern one, opened in 2013. The southern span is made of a 3×73.5 m composite right-bank section, a 3×108.5 m orthotropic steel riverbed section and a 3×73.5 m composite left-bank section. The concrete piers stand in the water, and the deck forms broad curved openings between them.

The idea of a ring road around Budapest was first set out by Boldizsár Vásárhelyi in a 1942 work on Hungarian roads. Construction of the bridge, then called Hárosi Duna híd, ran from 1987 to 1990; the first caisson element was placed on 25 August 1987 and the completed span opened on 16 November 1990. A second, southern bridge was built from 2010 and opened on 30 June 2013, and the northern structure was renovated and reopened in May 2020.

The bridge is named after Ferenc Deák, the 19th-century politician. Unofficially it is also called the Hárosi Duna-híd, and the Geographical Names Committee approved the Deák Ferenc híd name on 27 October 2003. It carries the E60, E71 and E75 international routes.

The bridge carries the M0 ring road across the Danube at Budapest's southern edge, with the older northern span and the newer southern span each taking one direction of traffic. The northern span was closed on 5 September 2018 for rebuilding and reopened on 9 May 2020, then closed again two weeks later with half-track diversions.

The bridge carries the M0 ring road and is the busiest crossing in Hungary, used by more than 100,000 vehicles daily. Its two parallel spans were built separately: the northern one from 1987 to 1990, the southern one from 2010 to 2013. The southern span consists of three 73.5 m composite side spans and a 3x108.5 m orthotropic steel riverbed span.