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.
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.
What you said happened to me, too On the same highway, for example, 300 kilometers, the driving time originally given by navigation is 2.5 hours. Now sometimes it takes 5 hours, and sometimes it takes 3.5 hours. Is the journey longer?
Of course, the distance is not longer, but the navigation is smarter!
Navigation is calculated according to certain rules. In the past, few factors were considered in navigation, so the distance from the destination to the departure point and the speed limit were considered, and then a reference time was provided, such as the above-mentioned 2.5 hours and 300 kilometers, and the speed limit was 120.
Now the internet speed has improved, and real-time road conditions are easy to get. Now the navigation starts to worry about the driving situation on the road, whether it is traffic jam or temporary traffic control. Once you find these, it will help you calculate the driving time, so the time given by navigation is changeable now!
I don't know if your navigation is like this, but the navigation I saw on Tiguan is like this!
Welcome to pay attention to walking candy and talk about cars together!
Even so, you can basically ensure that your travel speed is above 90 o'clock and will not exceed 100.
After all, the car should start, accelerate and brake.
Just like when a big media reported the opening of the high-speed rail, it directly used the design speed to divide the mileage and deceive the people. Really? Isn't the high-speed train from Beijing to Shanghai usually more than five hours?
Back to navigation, today's navigation is the product of big data analysis. Sometimes it shows green, which doesn't mean it can run on 120. And some high-speed speed limits are not 120, but 80 or 100. Besides, you have the wrong car.
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.
First, the actual road speed limit:
Especially when driving on the expressway, many sections are limited in speed, such as tunnels, continuous curved sections and dangerous sections in mountainous areas. This place has obvious speed limit control. The original 120 km can only be changed to 60 km or even 40 km, and overtaking is not allowed in the tunnel, so you can only drive safely according to the speed limit, and you can't get up quickly.
Second, there are many high-speed speed limit intervals:
Although some high-speed roads are well designed, many high-speed speed limit sections will be set up for their own safety reasons. Some sections can only travel 80 kilometers, and some sections are 70 kilometers. The sections with more straight roads will be standard 100 km and 120 km, so the navigation data will change in real time with the change of vehicle speed.
Third, the congestion situation is different:
With more and more vehicles driving at high speed, sometimes road congestion will make many speeds unattainable, and congestion will lead to longer and longer time to reach the destination, especially on holidays. Therefore, as far as car owners are concerned, choosing a high-speed before departure, being optimistic about the road conditions and paying attention to the weather can get to the destination faster.
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 calculates time according to the speed limit, and it will take you that long to run according to the speed limit.
It's a 300-kilometer highway, not a holiday. Zhongtong does not rest, and there is no traffic jam. It takes almost three and a half hours to drive at a speed of 80- 100 km. Four hours is more suitable for a break. Not counting the maximum speed 120. It is not uncommon to drive below 80 in the fast lane. In fact, the navigation time is much faster than you estimated. After all, there is big data support.
The 300-kilometer expressway takes three hours to drive because it has to pass the toll booth. The speed limit of some sections is 100 instead of 120, and the speedometer is not allowed. 1 15 actually shows only about 65438. Generally speaking, the average speed can reach 100 without speeding, and it is quite fast if the average speed reaches 30, so the distance of 230 kilometers between the urban areas on both sides takes one hour, which adds up to almost four hours. This is the case if urban congestion and low speed limit in special curved sections of expressways are taken into account. You can navigate in sections and know how long the speed and high speed are.