U-turnFinland
1. U-turn
A U-turn is a driving manoeuvre in which a vehicle turns around to travel in the opposite direction. It normally involves crossing part of the roadway and re-entering traffic facing the direction from which the vehicle came.
Before making a U-turn, the driver should check surrounding traffic, pedestrians and cyclists, signal when required and make sure there is enough visibility and space to complete the manoeuvre safely. U-turns may be prohibited by traffic signs or on particular types of roads.
Can you turn around in a signed Finnish tunnel?
No. Reversing is also prohibited there.
🔗 finlex.fi • Finlex, Finnish Road Traffic Act 729/2018 — 34, 46, 59–61
🔗 finlex.fi • Finlex — corresponding current Finnish statutory text
Can Finnish drivers use motorway central-reservation crossovers?
No. Drivers must not use the connecting road between opposite carriageways.

Traffic rules
Finland