Forums > Travel Yunnan > Highway Engineering Marvels and Global Comparisons Is there anywhere else in the world (apart from China) with as many tunnels and as much total tunnel length on a single length of highway as there is in this place in China?
The G8011 Mengzi-Hekou (蒙自-河口) expressway is hundreds of kilometers from the nearest major city, Kunming, but it contains what I believe to be one of the world's most impressive collections of tunnels. Over a length of 23.3 kilometers, the G8011 descends 850 meters in elevation into the Red River Valley (红河谷), passing through 14 tunnels, three of which are over 1000 meters long, and which add up to a total of 10,244 meters of length, making 44% of this stretch of highway tunnels (if the final tunnel is excluded, 9.528 meters of tunnels over 18.9 km of highway calculates to an even high proportion of tunnel at 50%).
If you want to examine this stretch of highway for yourself on google earth, then you can check these two sets of coordinates:
A) 23°06'39.58" N 103°17'24.93" E
B) 22°58'57.66" N 103°24'39.40" E
Looking for a counterpart in the United States, I calculated that Interstate 70 passes through a total of 6 tunnels while crossing the Colorado Rockies, for a total of 4,915 meters over 252 km of highway, meaning 0.02% is in tunnels. Clearly, there's no comparison here.
Is there anywhere in the world that could match this example I've found from China (excluding other examples in China itself....which are numerous)?
What does this say about Chinese engineering and highway development?
Why are Chinese highways so much more tunnel-intensive? Is it because the landscape is more mountainous and the tunnels are necessary? Or is it because Chinese engineers are more willing to build a tunnel through a mountain than build around it (if so, this presents an interesting departure from the cultural adage that the Chinese method of dealing with a problem is to go around it rather than straight through it).
List of tunnels on 23.3 km of G8011 between 23°06'39.58" N 103°17'24.93" E and 22°58'57.66" N 103°24'39.40" E:
1419 m
1817 m
903 m
208 m
435 m
1343 m
453 m
336 m
178 m
227 m
909 m
320 m
980 m
716 m
total 10,244 meters of tunnels over 23,300 meters of highway
44% tunnels
Excluding the final tunnel:
total 9,528 meters of tunnels over 18,900 meters of highway
50.4% tunnels
I-70 through the Colorado Rockies
Glenwood Springs to Denver 252 km
Eisenhower Tunnel 2700 meters
Beavertail Mountain Tunnel 221 meters
No Name Tunnel 287 meters
Hanging Lake Tunnel 1225 meters
Reverse Curve Tunnel 195 meters
Twin Tunnels 287 meters
total tunnel length in Colorado 4,915 meters
0.02% tunnels
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Hydro is no silver bullet. There are a lot of downsides to these dams, ecological, social, and economic.
There is a recent historical record with plenty of evidence which we can consult, where the Chinese have built dams like this one in other neighboring countries, like Laos. In most cases, the social (AND economic) impacts on the communities who inhabited the valleys that flooded by these megaprojects have been devastating.
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