The Bundesstraße 26 or Federal Highway 26, (abbreviation: B 26) runs between the city of Riedstadt at the B44, to the city of Hallstadt, at the Bundesautobahn 70, A70 in Germany. The highway run East to West. It crosses the River Main and the Mannheim–Frankfurt railway.
The highway runs through (West to East): Riedstadt, Griesheim, Darmstadt, Dieburg, Münster, Hesse, Babenhausen, Großostheim, Aschaffenburg, Goldbach, Bavaria, Hösbach, Laufach, Rechtenbach, Lohr, Gemünden am Main, Karlstadt am Main, Arnstein, Werneck, Bergrheinfeld, Schweinfurt, Schonungen, Theres, Haßfurt, Zeil am Main, Ebelsbach, Eltmann, Viereth-Trunstadt, Bischberg and Hallstadt.
Just west of Darmstadt the B26 crosses the Bundesautobahn 5 and Bundesautobahn 67, known as the Darmstädter Kreuz (Darmstadt cross).
Until the changing of Luisenplatz (Luis Square) in Darmstadt into pedestrian zone in the 1970s, the B26 road ran through center Darmstadt. In Darmstadt the B26 meets the North-South Highway of Bundesstraße 3, B3. Today, the B26 pass under the Darmstadt city center.
As a replacement for the crossing of the Darmstadt city center, a north eastern bypass is planned. It should relieve the downtown area from car and truck traffic. The planned route was to connect the Darmstadt Ostbahnhof and the Martin-Luther-King-ring. Half of this new road will run in a tunnel.