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When approaching a tunnel, it is important to switch on your dipped headlights. Doing this will help you see better in the dark and reduce the risk of an accident occurring. It is also important to be aware that when entering a tunnel, your eyes may need time to adjust from bright light outside of the tunnel into sudden darkness inside. To help with this adjustment period, reducing speed can be beneficial as it gives more time for eyesight acclimation and allows drivers more reaction time should something unexpected happen within the confines of the tunnel walls.


In addition to reducing speed while driving through tunnels, maintaining alertness at all times is essential for safe passage through any enclosed space such as these structures. Keeping an eye out for other vehicles or animals that could present potential hazards while passing through can also help ensure safety during transit, allowing enough distance between cars or providing extra caution around turns.


Finally, it’s always advisable when entering a long stretch of road such as passing under mountain ranges or large bodies water via bridges/tunnels to make sure you have plenty fuel so if there were any problems encountered there would still be enough gasoline available to reach one's destination safely. Taking these precautions not only helps protect yourself but others who share roadway with you too, making everyone involved safer no matter where their journey takes them!