Einseitig verengte Fahrbahn — Road narrows on one side
Zeichen 121, StVO Anlage 1. The carriageway narrows from one side only; the sign shows which. Verified 2026-08-03.
In plain English
One line stays straight, the other leans in. The leaning side is the side you lose.
What you are looking at
Upright red-bordered triangle; one vertical black line straight, the other leaning inwards (variant -10 narrows from the left, -20 from the right).
Easy to confuse with — the exam exploits these
Gefahrzeichen (Warning) — get ready — it never orders you. usually a red triangle. Checked against StVO Anlage 1–3 on 2026-08-03.
Original practice questions — not the amtlicher Fragenkatalog. Every question, sign description and scenario here is written by us and covers the same StVO rules as the official Klasse B test. We are not TÜV, DEKRA or a Fahrschule, and we do not reproduce the official catalogue. Road signs themselves are amtliche Werke (StVO Anlage 1–3). Rules checked against StVO and FeV on 2026-08-03.
Fines and Punkte are indicative. The amounts shown come from published Bußgeldkatalog tables, not from statute, and are last verified 2026-08-03. The binding figure is the one on your own Bußgeldbescheid.
Last updated: 2026-08-03