What lights should be turned on before entering a tunnel?

[OBeckett]

Before entering a tunnel, you should turn on the headlights (i.e., low beams, which will illuminate the front low beams and width indicators, while the rear brake lights will also activate). The purpose of low beams is to provide close-range illumination, designed with a wide coverage angle (160°) and a short illumination distance of approximately 30-40 meters. Precautions for driving in tunnels are as follows: 1. Reduce speed and turn on lights before entering the tunnel: If driving during the day, the light will suddenly dim upon entering the tunnel, often causing the human eye to take a short time to adjust. Therefore, you should reduce speed, increase the following distance, and turn on the headlights before entering the tunnel, maintaining a relatively slower speed to enter safely. 2. Do not use high beams: Using high beams for extended periods at night can affect oncoming and preceding vehicles, as high beams can cause temporary blindness to drivers. 3. Strictly avoid speeding: Tunnels usually have strict speed limits, with speed limit signs prominently displayed before entering. Some tunnels also have speed limit reminders inside.