It seem that it might be the Karakoram Highway that connects Pakistan and China
This is the 1300 km Karakoram highway passing from Pakistan to China – now recognized as 8th wonder of the world
Quote from above url reference:
“The Karakoram Highway (known informally as the KKH) is said to be the highest paved international road in the world, but at its peak at the China-Pakistan border it is only paved on the Chinese side. It’s the road to paradise – if you like exploring the mountains, that is. It’s regarded as one of the world’s hardest alpine climbs.
It’s the road to paradise – if you like exploring the mountains, that is. It’s regarded as one of the world’s hardest alpine climbs. Drive with care as this is a mountain road with hairpin curves and dangerous dropoffs. You might want to take this into consideration if you have passengers that don’t like heights.
The Karakorum Highway connects China and Pakistan across the Karakoram mountain range, through the Khunjerab Pass, at an elevation of 4,693 metres (15,397 ft) above the sea level. The road is one of the scariest and hair raising jeep trip in the world. 810 Pakistani and 82 Chinese workers lost their lives, mostly in landslides and falls, while building the highway. The route of the KKH traces one of the many paths of the ancient Silk Road. The road has a length of 1,300 km (800 mi): Pakistan: 887 km (551 mi) and China: 413 km (257 mi). It was started in 1959 and was completed in 1986 after 27 years of construction.
The road is mostly asphalted. It’s a real challenging road and a true test of your vehicle and your stamina because the road abounds in twists and turns with wheels sometimes hanging above the precipice. The highest paved international road on the planet doesn’t come without its dangers. The road is extremely treacherous and requires a vehicle that can hold its own against some of the most unforgiving terrain in the world. Avalanches, heavy snowfalls and landslides can occur anytime and can sometimes block some sections of the road. While the incredible views of K2 you see along the way make it a popular tourist route, the 800-mile highway is a nightmare for people who are prone to altitude sickness. With absolutely no barrier on one side, and shear rock wall on the other, the margin of driver error is fairly slim. To make matters worse, the area is prone to floods and landslides.”
According thedrive.com article this appears to be the case
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