What is the speed limit in highway tunnels?
2 Answers
Highway tunnels have speed limits ranging from 60 to 80 kilometers per hour. Tunnels are engineering structures embedded within strata, representing a form of underground space utilization. Pre-highway inspection items include: 1. Checking if the radiator has sufficient coolant; 2. Verifying the tension and condition of the fan belt; 3. Assessing engine oil level and cleanliness; 4. Ensuring tire pressure meets inflation standards and inspecting for any tire damage. Important precautions for driving through highway tunnels: 1. Reduce speed appropriately before entering the tunnel; 2. Activate headlights in advance; 3. Maintain adequate safety distance from preceding vehicles; 4. Avoid using high beams inside the tunnel.
I frequently engage in long-distance transportation, and highway tunnels require special attention. The usual speed limit is 80 kilometers per hour, but some special tunnels have even lower speed limits, such as 60 kilometers. About 300 meters before entering the tunnel, you'll see the speed limit signs—don't wait until you're inside to check. Visibility inside tunnels is much worse than outside, and the road surface often has accumulated water, making speeding particularly dangerous. Also, many drivers aren't aware that lane changes are completely prohibited throughout the tunnel—even if a truck ahead is moving slowly, you can't overtake. Once, I saw someone force a lane change and nearly cause a chain-reaction accident. Remember: slow down to the speed limit before entering the tunnel, turn on your low beams, and stay focused on observing road conditions.
