What is the speed limit in highway tunnels?
4 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.
Last week, while driving along the Sichuan-Tibet Highway, I noticed an interesting phenomenon: the speed limits in different tunnels vary significantly. For example, the Erlangshan Tunnel has a limit of 80 km/h, while the Mila Mountain Tunnel is limited to 60 km/h. Generally, highway tunnels default to 80 km/h, but it's always best to check the road signs. The most annoying thing inside tunnels is encountering drivers using high beams—the intense light reflecting off the walls can really strain your eyes, making speed control even more crucial. I recommend using a mobile navigation app to get advance notice of speed limits, especially when entering tunnels at dusk when the visual adjustment is drastic—80 km/h is just right for a safe reaction. I remember a friend once entered a tunnel at 100 km/h and nearly rear-ended a car that braked suddenly. Safety first—driving slower is never wrong.
When our family travels with kids, we always get particularly nervous entering tunnels. The speed limit in highway tunnels is generally 80 km/h, but it's essential to slow down in advance. Before entering the tunnel, adapt to the light change and reduce speed below 80 km/h for maximum safety. Nowadays many tunnels have speed cameras installed - getting caught speeding is minor compared to our primary concern for the children's safety. Maintain more following distance in tunnels than on regular roads - last time when the car ahead had a tire blowout, we would've crashed if we'd been just two seconds faster. Also, remember never to use high beams in tunnels - that dazzling light is extremely dangerous for other drivers. Safety comes first - it's worth spending a few extra minutes.
