Many car owners have the habit of using navigation when traveling, especially when passing through some unfamiliar and complicated roads. Navigation is a "guide", but many times the driving time displayed on the navigation is inaccurate, which is for certain reasons.
For example, when driving at a high speed of 300 kilometers, when you set the navigation, it shows that the estimated driving time is more than 5 hours. The first reaction of the owner is that the data is inaccurate. According to the speed of 100km/h, it takes 3 hours. How can it last for five hours?
First of all, navigation does not take speed as a single judgment data, but data obtained by integrating various factors, such as high-speed driving. According to the traffic law, drivers can't drive fatigue. At this time, the navigation will calculate the rest time. Furthermore, according to the driving situation before this section, such as whether there will be traffic jams or how much the speed limit of those sections will be calculated.
Although the traffic on the expressway is not as congested as that in the urban area, there are some special sections, so it is unrealistic that you can't keep driving at the speed of 100- 120km/h after the vehicle starts.
The data on the navigation is fixed, but the driver's operation is flexible. How long do I need to rest for more than 20 minutes? How many car owners can do it? Navigation determines the driving time according to laws and regulations and road conditions, which often increases the actual driving time.
First of all, we need to understand the working principle of real-time navigation.
1, the navigation will get the speed limit along the way through the traffic control department and get the fastest transit time.
2. Through the feedback of the traffic control department's equipment, including real-time monitoring on the road, traffic guidance information, etc. on the road congestion situation, the time required to pass through the congested road section is estimated.
3. Feedback the real-time speed of other vehicles using navigation on the road.
Finally, through the integration of big data, the required time is estimated.
Usually, we use Gaode map navigation to enter the destination, and the navigation will show the required driving time. It is very easy and simple to check the given time. Actually, this is the answer given by big data.
The sources of big data are as follows:
1. Traffic data is the camera of the traffic control department.
2. 122 accident alarm telephone records.
There are still a lot of eyeliner on navigation software. For example, Gao De's congestion report, the data comes from the floating car cooperated by the traffic control department.
4. Even users themselves may be the data source of navigation maps.
So when these data are integrated, the estimated time and actual time of general navigation will not be much different.
Navigation on the 300-kilometer highway is expected to take more than five hours, which is a normal time. Don't underestimate navigation, and don't doubt the authenticity of its estimated time. The estimated time of navigation is calculated through the daily traffic time of hundreds of millions of users and the current traffic congestion, using big data analysis. This time is basically accurate, even if there is an error, it will not be too bad.
Every time I take the expressway, I compare the estimated time of navigation. For a 600-kilometer expressway, the estimated sailing time is more than eight hours. Sometimes navigation is too tiring. I don't believe that it takes more than eight hours to run 600 kilometers, and it takes six hours to run the whole distance at 100 kilometers per hour. But it's not what you think. There are too many uncertainties on the expressway. Sometimes there is no traffic jam, but the speed just can't run. When there are many cars, the speed can only run to 70-80 per hour, and the speed limit when crossing the tunnel is 80. When you meet a turtle-speed vehicle in the fast lane, your speed will also decrease. It often takes a few minutes for a big truck to overtake in front, so you can only run patiently behind. All kinds of situations together, the average speed will be around 80, even if there is no traffic jam, the average speed will be a little over 90. After many attempts, basically the same result.
The estimated time of navigation is generally the normal transit time, even if speeding, it can reach the destination one or two minutes in advance, which is very powerful.
I just ran a trip to Dongdaihe from Beijing two weeks ago. The estimated sailing time is 4 hours, with a total length of * * * 315km. I grinned at that time. Heart said: Navigation doesn't know my sense of speed.
You can really be dumbfounded on the Jingha Expressway and measure the speed in the interval! Unable to cruise all the way to 120 at a constant speed, I had a meal in the service area halfway. Because of the old man, the time for eating is a little longer, about half an hour. In this way, from 10 in the morning to 14: 15 in the afternoon, we arrived at the entrance of Dongdaihe Hotel. By the way, my interval speed is 1 14 or 1 16. Occasionally, in order to overtake, the instantaneous speed also reached 140, 160.
Therefore, navigation is a time judgment given under big data, and various factors should be taken into account. If it takes 5 hours to navigate 300 kilometers, it means the speed limit is 100.
300 kilometers, five hours, no problem. Very few high-speed vehicles can travel at120km for a long time, and many high-speed speed limits are 100, 1 10. There are still some situations on the road where we have to slow down. The expressway has a section of maintenance every 100 km, which is also the average.
120 runs 60 kilometers,1/kloc-0 runs 60 kilometers, 100 runs 60 kilometers, 90 runs 60 kilometers, 80 runs 60 kilometers, and takes two breaks for 40 minutes. Only 4.5 hours. The highway can't be the destination. It takes 0.5 hours to get up and down the expressway, so it's not five hours. This is a normal accident-free situation.
Navigation will consider the following factors when calculating time:
1, speed limit and mileage.
2. Traffic information of the traffic department, including temporary speed limit and congestion caused by construction, accidents and traffic restrictions.
3. Big data information returned by other vehicles in relevant sections.
It is difficult to reach the navigation prompt time without speeding. Navigation tips take 5 hours, usually 5.5 hours. I did a pro-test. The speed limit is 200 km 120, and there are few vehicles. The navigation prompt is 2 hours 10 minute. It took me 2 hours 1 minute. I cruise at a constant speed 125 and drive to 140 as soon as I pass the speed measurement. If 120 cruise at a fixed speed, it will definitely exceed the navigation prompt time. It is impossible to overtake a big car without slowing down.
All the way is high-speed, 300 kilometers. Why is the estimated sailing time more than 5 hours?
It is not surprising that drivers and friends who go out on the highway often encounter such a situation. The time given by navigation is the comprehensive road condition time of this mileage. The conclusion drawn after the analysis of big data processing system should be very accurate. Due to the following reasons, it was dealt with in this process.
1, the road speed is limited, the flat road is unobstructed, the maximum speed limit of Bay Road is 120km/h, the average road surface is 100km/h, the tunnel is 80km/h, and the road construction is 60-40km slow, which may be lower for safety reasons.
Nowadays, the development speed between cities is getting faster and faster, with large flow and slow speed.
3. Human factors lead to road congestion, trucks or vans occupy overtaking lanes, or they often meet along the way when answering the phone or playing mobile phones.
4. Traffic congestion causes you to chase after each other, resulting in traffic accidents. The traffic police couldn't get to the scene for a while, and there was no command to form a traffic jam.
There are many reasons for road congestion. The results obtained through camera, Internet and big data analysis and processing should be the most comprehensive and accurate.
To sum up, it is not difficult to understand why the navigation is expected to take more than 5 hours because all the way is high-speed and 300 kilometers. For reference only, I hope it will help you.
I usually run the expressway twice a week. In my experience, those who listen to navigation ...
The previous navigation was not accurate, and the current navigation is still accurate, so navigation gives its own reasons this time, because it is calculated by big data.
If you think one navigation software is inaccurate, you can try another software. For example, if you end using Gaode, it is estimated that it will take more than 5 hours. Then you can look at Baidu map again. I don't think there is much difference.
Because the current navigation is much more accurate than before, if it takes about two hours, the error is about 10 minute. It is a comprehensive result based on traffic cameras, weather, road conditions, speed limit, satellites and user feedback.
The route in the picture above is the route I often run. A Baidu and a Gaode can see an hour and a half journey. The error between the two pictures is very small, more than three minutes at most. It can be said that the current navigation is very accurate.
According to the landlord's 300 kilometers, if the speed is 100, it will definitely take three hours to run, but it does not rule out some special circumstances on the road, such as congestion or poor road conditions, or many large trucks. When I run at high speed, I often encounter large trucks overtaking frequently, which leads to our speed running around 80.
So I think we should reserve more time when we go out, and don't be in a hurry, because there are too many uncertain factors on the road, so we must ensure safety first anyway.
The car is driving on the expressway, and the distance between the two places is 300 kilometers. Generally, the speed limit of expressway is 120 km/h, and theoretically, the whole journey can be completed in less than 3 hours. But in fact, the driving time will be longer than the theoretical time, and some will be much longer (except for local tyrants who ignore traffic laws and violate the rules at will). This is because:
1. It is difficult for vehicles to drive at the maximum speed limit all the time, and deceleration sometimes occurs. Not to mention the highway with random road conditions, even the high-speed rail that runs strictly according to the timetable takes longer than the theoretical time. This is because some sections have to slow down because of terrain restrictions, because they have to slow down to avoid other high-speed trains and stop halfway. The situation of cars driving on the expressway is more complicated. The speed limit of some sections is lower than 120 km/h, and the speed limit of some mountainous areas, culverts or alpine regions is 80 km/h or even lower in winter. Even if all of them drive on the speed limit 120km/h route, they will slow down because of avoiding other vehicles or being blocked by trucks, so the driving time will be lengthened.
2. The navigation software will provide us with navigation service and also give the predicted driving time. First of all, you should know that the time prompt of navigation software is the estimated time given by big data, which is a dynamic result. The results of checking the same road section now and one hour later may be different, and sometimes there will be a big difference. In addition, it will constantly adjust the time to use the remaining sections according to the change of your driving position. It dynamically collects the prediction results of speed limit, road conditions, traffic flow, whether there are congested road sections, the length of congested road sections and the degree of congestion through computer calculation, and the prediction results will also change when these factors change. Moreover, its prediction result is a conservative estimate, which can actually be shorter than its prediction time.
Therefore, it is enough to make a reference to the running time prediction given by the navigation software and make a general prediction of the road section, so that you can correct your psychological expectations and make full preparations for achieving the goal.
With the continuous progress of technology, the current mainstream navigation system can basically achieve smaller errors. As you said, the situation that the speed is 300 kilometers and the estimated sailing time is as long as 5 hours is not a calculation error to a large extent, but also within the normal range. There are many factors involved here, such as the deviation between speed value and reality, the influence of real-time traffic information and so on. We all know that the navigation computing system is quite complex and accurate, and it is satellite positioning, and some have real-time traffic information display, such as traffic jams, detours and other reminders. It will definitely take a little longer to navigate by calculating the comprehensive road information. After all, we divide the mileage by the theoretical maximum speed to get the time, which is too general and does not include real-time road conditions. There must be a deviation. Generally, there are different standards for the speed limit of expressways, such as 80km, 100km, 1 10km, and navigation will not calculate our time according to the highest value.
In addition, at present, many expressways are being widened or maintained, which leads to the change, diversion and even compression of the original roads from the original four lanes to two lanes and one lane. We often encounter this situation when going out. For the sake of safety, the vehicle speed will be limited to a lower value, for example, from the original 1 10 km/h to 60 km/h. Navigation will recalculate the time according to the real-time road conditions, and it is inevitable that the navigation display time will be much higher than the theoretical arrival time.
Finally, in addition to the estimated navigation time being higher than the theoretical arrival time, there are also cases where the estimated navigation time is lower than the theoretical arrival time, and it takes three or four hours to arrive after two hours, which is also very common. I think the rapid development of science and technology makes navigation, a convenient tool for people to travel, more and more intelligent, and the control ability of distance, time and speed will become more and more accurate. The error you mentioned will definitely be gradually eliminated.