BNN – Traffic routing during construction at the Schlossplatz tunnel in Karlsruhe

A new detour plan in Karlsruhe reroutes traffic around the Schlossplatztunnel due to renovations and tech upgrades from mid-2025 through end-2026. Visualized here is the construction zone and affected traffic pathways.

This is a German-language traffic diversion map of central Karlsruhe, focused on planned construction and detours around the Schlossplatztunnel, adjacent to the Schlossgarten (Palace Garden).

Key Visual Elements:
Highlighted Zone in Red (“Baufeld”):
The construction site area, primarily affecting the southern portion of Schlossplatz near Kaiserstraße.

Orange Arrows (“Umleitungsführung Kraftfahrzeuge”):
Detour route for motor vehicles. It diverts traffic along:

Adenauerring (eastern/northeastern ring)

Moltkestraße, Stephanienstraße, Willy-Brandt-Allee and more.

Landmarks labeled:

Schlossgarten (centered green area)

BBBank Wildpark (stadium/arena near Adenauerring)

Duration box (in red):

“Dauer der Bauarbeiten: 30.06.2025 – 31.12.2026”
(Construction duration: June 30, 2025 – December 31, 2026)

Legend (bottom left):

Red: Baufeld (construction zone)

Orange arrows: Vehicle detour routes

Source.