I am currently inside a tunnel with bright, continuous overhead lighting. The road markings are white, and the tunnel walls are smooth and curved, which is characteristic of modern infrastructure. Given the lack of external scenery, I am relying on the tunnel's design, which looks very similar to those found in major European or East Asian cities. I suspect this is a tunnel in Japan due to the specific lighting style and road markings. I am not very sure yet.

Country: Japan
City: Tokyo
Confidence: Low

then: forward

The tunnel environment remains consistent, with smooth, light-colored walls and a distinct, continuous strip of overhead lighting. The road markings are white, and the driving side appears to be on the left, which is common in Japan, Australia, and the UK. The specific curvature and the clean, modern aesthetic of this tunnel strongly suggest a major urban expressway, possibly the Yamate Tunnel in Tokyo. The lack of other visual indicators makes it difficult to be certain, but the infrastructure style is very characteristic of Japanese highway engineering.

Country: Japan
City: Tokyo
Confidence: Moderate

then: forward

The tunnel walls are smooth, beige, and curved, and the lighting is a continuous, distinctive arch shape. This specific tunnel design, featuring these curved walls and lighting, is iconic to the Clem Jones Tunnel (CLEM7) in Brisbane, Australia. The driving side is on the left, consistent with Australian road rules. The overall aesthetic and the specific tunnel geometry match the underground expressway network in Brisbane perfectly. I am quite confident in this location.

Country: Australia
City: Brisbane
Confidence: High

then: guess