Why is the road on the hill curved and not straight

Many, many years ago, when I was studying road construction at university, the professor told us the story that in the old days, when a road had to be built in the mountains, the prospector would lead a donkey or mule up the slope. Instead of going straight up the shortest route, the donkey will instinctively follow a moderately steep road that is very similar to the maximum slope of road safety (8 - 10%).

The Prospector will follow the donkey to nail the stakes to the ground, then measure the position of the stakes, draw all the points on the map, connect the dots and start drawing the outline of the road.

When the prospector feels that the donkey has deviated from the expected direction, or has encountered an obstacle, they will turn the donkey around, and the donkey will continue to climb up the same slope in the opposite direction. The place where the donkey changes direction is where the hairpin bends.

** from the internet: This incredibly winding road is located in the Andes Mountains of South America.

somewhere.

A car with enough gear ratio (and enough grip) can climb a very steep slope, but a fully loaded van or a bus full of passengers cannot. As many have pointed out in theirs, going uphill and downhill on a very steep slope is extremely dangerous.

The slope or eight percent of the slope of the main road is considered the limit. On short distances, a grade of 10% -15% or even 20% can be considered acceptable, but it must be accompanied by adequate signs.

There are some really good results on some mountain roads, but I don't want to travel in a truck on roads like this :: Note that "slope" and "angle" are two different measurements, as "slope" indicates how much a person has climbed in a given horizontal distance.

For example, if you move 1000 meters (1 km) horizontally and climb 100 meters at the same time, the slope will be: One benefit of expressing the rate of climb in this way is that it has nothing to do with the unit of distance you use, as long as the horizontal and vertical distances are the same. If you measure the horizontal distance and take it in miles.

Climb in units and you'll get the same results as you would if you were using metric units (but if you climb the distance in miles and in feet.)

Climb as a unit and the result will be different! )

An angle of 10% is about 6° and an angle of 50% is about 27°. The slope of the angle of 45 degrees is 100% Those who are keen on the triangle, or from school recollections, will recognize that "grade" is equivalent to an angle of "cut", except for the unit, the triangular cut is a pure number, although the grade is expressed as a percentage (%) or per thousand (for railway engineering, the grade is very small) to remove the decimals.

This is mainly the relationship between the topography, the general mountain roads are uneven, relatively steep, so when building the highway is basically curved, in fact, this is also very easy to understand, and the general mountain road is usually needed to go around, can not be said to be directly along the direct repair of the past, must take into account the safety, too steep mountain road is easy to vehicle overturning accidents.

Because the curved road is better to go up the mountain, if you build it straight, you will find that the road is very steep, so it is very inconvenient to go up and down the mountain.

Because the mountains are so abundant, it takes the trails to stretch for thousands of miles to avoid those important forest lakes.

Why are mountain roads crooked? It's a confusing question and an interesting topic.

First of all, the reason for the curvature of the mountain road is the terrain.

Mountains are made up of peaks, valleys, ridges, etc., and mountain roads are also designed along the course of mountain ranges, so mountain roads tend to be curved.

Secondly, the reason for the curvy mountain road is safety.

The bend of the mountain road can reduce the speed of the vehicle, which can reduce the incidence of traffic accidents.

In addition, the bend of the mountain road can also prevent the scale from burying the vehicle into landslides, thus improving driving safety.

Again, the reason for the curvature of the mountain road is aesthetics.

The bend of the mountain road allows it to blend in with its surroundings and make it look more aesthetically pleasing.

In addition, the bend of the mountain road can also make it look more comfortable, which improves the comfort of driving.

In the end, the reason for the curvy mountain road is the cost savings.

The curvature of the mountain road can reduce the construction cost, because the curved mountain road can make the construction easier, thus saving the construction cost.

In conclusion, there are many reasons why mountain roads are bent, including topography, safety, aesthetics, and cost savings, among others.

The bend of the mountain road can improve the safety of driving, make it integrate with the surrounding environment, save construction costs, and thus improve the comfort and cleanliness of driving.

It wasn't until I fully understood the requirements of mountain road construction that I really understood the deep meaning behind the twists and turns, which was a geography exam question in high school, which examined the elements of mountain road construction, and after listening to the geography teacher's explanation, I knew that the construction of the mountain road was completely for safety considerations, it turned out that this was a travel experience of the geography teacher, when he was in the car on the mountain road, his eyes looked out at the cliffs, and the car drove very slowly, but the winding road made him feel an inexplicable tension and pressure, so he wrote about this experience in the form of a question.

Originally, the twists and turns of the mountain road are for the sake of the safety of the mountain road driving, if the mountain road is built too straight, then because of the inclination angle of the mountain itself, the mountain road slope will be too large, and the vehicle will be difficult to control in the process of driving, and the zigzag roundabout of the mountain road construction is to reduce the slope and improve the driving safety, and the winding driving path forces the driver to slow down the speed of the car in the case of last resort, so as to facilitate the control of the car, effectively reduce the possibility of accidents. Although the mountain road has increased the difficulty in construction, it has an extra layer of safety guarantee and reflects the good intentions of the designer.

This is mainly the relationship between the topography, the general mountain roads are uneven, relatively steep, so when building the highway is basically curved, in fact, this is also very easy to understand, and the general mountain road is usually needed to go around, can not be said to be directly along the direct repair of the past, must take into account the safety, too steep mountain road is easy to vehicle overturning accidents.

Therefore, from the perspective of vehicle safety, the winding road is also better, and the construction cost of this road will be relatively low, which is more suitable for actual needs, which also causes our common mountain roads to rarely say that they are as smooth and straight as our highways or roads, and the vehicles are often shaking and shaking on the mountain road, and it is very uncomfortable to sit, and even I have seen someone take a car across the mountain road, and get out of the car and vomit directly, so sometimes I know that the car I do has to pass through the mountain road. I don't dare to eat a lot of things, I'm afraid that I will vomit out because of the earthquake, and because it is a mountain road, the difficulty of driving is relatively large, and the wear and tear of the car is generally very large, so ordinary cars do not dare to take mountain roads, and ordinary drivers do not dare to take mountain roads.

And from another point of view, if the reason mentioned above is mainly from the cost and terrain considerations, and there are some slightly stable mountain roads behind, it will also be because no one has maintained it for a long time, so the road has become rugged, this is the same as some of our roads have to be demolished and rebuilt after a few years, but because the mountain roads are generally relatively remote places, a lot of local ** funds are not enough, so they are often not maintained after repairing, If there are many cars passing by or there is a similar landslide, it is easy to exacerbate this situation.

Because it is impossible for any vehicle to go up the mountain directly, it must be turned up little by little through this winding road.

All the mountain roads were built in a curved shape and spiral, and they went up layer by layer, like a spiral on a screw, and if we were to climb to the top of a mountain, we might say that we could climb straight up, but the car could not do it.

The hand has a strong grip, and we can hold on to the surrounding trees tightly, but the car does not have the same grip as the hand, so it is impossible for him to rush directly to the top of the hill in the process of rushing straight up.

And if one foot of the accelerator is not stepped on in the middle, the whole car will fall, which is miserable. The straight up and down road is only suitable for people to walk, and it is definitely not good for cars.

The rotation of the winding road layer after layer effectively reduces the steepness of the very high peak, so that he uses a very gentle slope to let the vehicle go up little by little, this slope may not be felt during the driving process, but in fact it is layer after layer, so that we successfully turned to the top of the mountain, and do not feel very difficult.

Moreover, when building such a mountain road, it will also be twisted, but also in order for the vehicle to climb this hillside better and more powerfully, and the steepness may not be felt much in the process of bending, but in fact, the winding road is very effective in increasing its height.

In addition to increasing the height in the process of curved driving, it can also allow the car to crawl. I don't know if you have seen a lot of drivers when the car is out of gas, it often makes the car go in a crooked way, so that it can climb the slope.

Because the force is not enough because his car is out of gas, and the zigzag walk can make its slope slower and maximize his force. Therefore, according to this principle, the winding road can make the vehicle climb a high mountain with less effort and more fuel economy. Otherwise, there will be a lot of road turns, and increasing the height by bending is the most fuel-efficient and fastest way.

As a native of Chongqing, I feel that I am in a good position to answer this question. As we all know, Chongqing is a mountain city, there are not only many mountains, but also very high and steep, and people who grew up in the mountain city have seen the eighteen bends of the mountain road since childhood. It can be said that in addition to the streets of the main city in Chongqing, as long as it leads to a slightly remote place, there is no one that is not crooked, every time I take the car, I feel that I have been walking through the ups and downs of the steep slope, and people who are a little motion sick can't stand it at all.

And even if it's not a road, the trails hidden in the mountains are winding up, and there's no end to the road, unless you're standing on the highest point.

In fact, the reason why the mountain road is so curved is very simple, that is, to slow down the slope and reduce the danger of driving. The first reason why the path is curved is to reduce the difficulty of construction, and it is also to make it more convenient for people to pass and not climb uphill. When I was in elementary school, I learned an article about the zigzag railway built by Zhan Tianyou, the father of the Chinese railway, so that the train could drive over the mountain and make a turn.

In fact, the principle of the zigzag road is the same as that zigzag road, and there are zigzag ones in the mountain road, but not all of them. Looking at the winding mountain roads, it seems that a snake is winding on the mountain, after all, in order to climb up the mountain, you must follow the slope and direction of the mountain itself.

Another reason why the mountain road is crooked is to make it easier for people to get around. Because there are many people living in the mountains, the mountain roads were built to make it easier for them to travel, and of course the road should be detoured to the door of the house or close to home. And because they live in the mountains, it is impossible to live together, so each household is very scattered, and if you want to take care of more people, you have to build the road a little farther.