Learn why making a U‑turn when the left‑turn arrow turns red is a traffic violation in Vietnam, the penalties involved, and how to stay compliant. Read more now!
Vietnam’s traffic police have clarified that turning a vehicle around (making a U‑turn) while the left‑turn arrow is red counts as disobeying a traffic‑signal command – essentially a red‑light violation.
What the signal means
When the left‑turn arrow glows red, the instruction is clear: no vehicle may move in the left‑turn direction on that lane. Since a U‑turn includes a left‑turn movement, the red arrow also bans the U‑turn.
Mixed‑use lane markings (9.3)
Some intersections have a “9.3” lane marking – a combined straight‑and‑left‑turn lane. The painted arrows only indicate the allowed directions; the timing of when you may use them is still governed by the traffic lights.
If the straight‑through light is green while the left‑turn arrow is red, drivers in a 9.3 lane must continue straight. To turn left or make a U‑turn, they must stop at the stop line and wait until the left‑turn arrow turns green.

Legal hierarchy of road signs
According to Article 11, Clause 2 of the 2024 Road Traffic Safety Ordinance, the order of priority for road‑user compliance is:
- Directions from traffic officers
- Traffic‑signal lights
- Road signs
- Road markings and other surface indicators
- Physical road furniture (guardrails, reflective posts, etc.)
Therefore, a traffic signal always outranks lane markings.
Penalties
Making a U‑turn while the left‑turn arrow is red is classified as “failure to obey a traffic‑signal command”. Under Decree 168, the fines are:
- Cars: VND 18‑20 million (≈ USD 750‑830) and 4 driver‑license points.
- Motorcycles and scooters: VND 4‑6 million (≈ USD 165‑250) and 4 driver‑license points.
Practical advice for drivers
At intersections with a left‑turn arrow and a 9.3 lane, wait for the arrow to turn green before attempting a U‑turn. If you have already entered a lane that permits turning, stop at the marked stop line and proceed only when the signal allows. If you are in a different lane, continue straight and look for a legal U‑turn point further ahead.
Following these rules not only avoids hefty fines but also contributes to safer streets for everyone.

