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What is the maximum speed limit on national highways?

1 Answers
DeChase
07/30/25 10:56am
On national highways, the maximum speed limit is 80 km/h. Generally, the speed limits on national highways range between 60 and 80 km/h. Below are detailed explanations regarding vehicle speed: 1. Vehicle Travel Speed: Vehicle travel speed refers to the distance a vehicle covers per unit of time, commonly measured in kilometers per hour (km/h) or meters per second (m/s). 2. Vehicle Operating Speed: Vehicle operating speed is the average speed during the total service time of a vehicle (including driving time and idle time). It is an important metric for evaluating vehicle usage efficiency and transportation efficiency. Its value depends on the vehicle's average technical speed (average speed during driving time) and the amount of idle time.
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Does Tesla Come with a Charging Station When Purchased?

Purchasing a Tesla comes with a charging station, and if certain conditions are met, free installation is also provided. The conditions are: 1. Within 350 kilometers of a Tesla service center; 2. The charging cable length is within 30 meters. Tesla's vehicle lineup includes the Model 3, Model Y, Model S, among others. Among them, the Tesla Model 3 is equipped with a permanent magnet motor, paired with an electric vehicle single-speed transmission, delivering a maximum power of 202 kW and a maximum torque of 404 Nm. In terms of safety, the Tesla Model 3 is equipped with features such as tire pressure monitoring, seatbelt reminder, ABS anti-lock braking system, and traction control system.
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Why is the tail light of BYD Tang always on?

BYD Tang tail light is always on for the following reasons: 1. Brake light switch damage: Damage to the brake light switch can cause the rear tail light to stay on. Replacing the brake light switch can solve the problem. 2. Tail light circuit issues: If there is a problem with the tail light circuit, it should be repaired at a 4S shop as soon as possible. Introduction to car tail lights: Car tail lights include the lamps and bulbs at the rear of the car. One of the functions of the lamps is to gather and emit the light from the bulbs, thereby enhancing the brightness and range of the light emitted by the bulbs. The second function is to change the color of the bulb's light through the color of the lamps. Overall, the design of the entire car tail light involves disciplines such as optics, materials science, and structural science. How to maximize light efficiency while considering different shapes and lines, and perfectly integrating with the car, all test the designer's ability.
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Is an Automatic Transmission Driver's License Easy to Obtain?

Obtaining an automatic transmission driver's license is generally easier than a manual transmission one. Below is a detailed introduction to the automatic transmission driver's license: 1. Overview of Automatic Transmission: Automatic transmission falls under the C2 vehicle category for driving permits. It includes small automatic transmission vehicles. C2 covers small and micro automatic transmission passenger vehicles, as well as light and micro automatic transmission cargo vehicles. Small passenger vehicles with fewer than 9 seats, designed with a maximum total mass not exceeding 4500kg. Length ≤6.0m, width ≤2.0m, height ≤2.5m. 2. Requirements for Obtaining an Automatic Transmission License: As long as the driver is at least 18 years old, passes the medical examination, and does not have any diseases that prohibit applying for a driver's license, they can apply for an automatic transmission driver's license.
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What causes the red light on the BYD F0 temperature gauge to flash?

It indicates that the engine temperature is too high, and it is not recommended to continue driving. The reasons are as follows: 1. Overheating: If the temperature gauge shows a red light, you should not start or continue driving the vehicle. The red light indicates excessive engine temperature, which can lead to various engine problems. 2. Precautions: If you must continue driving, wait for the engine temperature to decrease. Also, check if there is a shortage of coolant. Severe overheating can affect the cylinder head and cause cylinder scoring. 3. Solutions: This situation is likely caused by low coolant levels in the engine. It is recommended to check the coolant level and add more if necessary.
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How to Connect HiCar to a Car?

HiCar can be connected to a car via Bluetooth or a data cable. Both methods effectively link with the vehicle's infotainment system. HiCar is an intelligent interconnection solution for people, cars, and homes launched by Huawei, seamlessly connecting mobile devices with cars. When using Bluetooth, the process is similar to standard connections: enter the verification code displayed on the car's infotainment system into your phone to complete the pairing. For wired connections, enable USB debugging mode. Additionally, related software can be used for wireless interconnection, enabling remote vehicle control. For older cars to use Huawei HiCar, a HiCar box can be installed. However, the car's original infotainment system must meet certain requirements, such as running on Android OS or having a built-in navigation system with sufficient memory for HiCar installation. If HiCar cannot be installed directly due to incompatible hardware, an external Huawei Smart Screen for Cars can be added to enable HiCar functionality. Currently, installing HiCar in older cars is not recommended, as many available HiCar boxes are pirated or cracked versions, not official Huawei products. Huawei primarily targets the new car market with HiCar, integrating it directly into Huawei's own infotainment systems rather than relying on external protocols like CarPlay or CarLife.
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How to Open the Rear Sunroof of the 2021 BMW 530?

The rear part of the sunroof in the BMW 530 cannot be opened; only the front part can be opened. Below is an introduction to the BMW 530: 1. Configuration: Engine Type: Inline 6-cylinder gasoline engine, four-valve technology, double overhead camshaft variable valve timing control system (Double-VANOS), digital electronic engine management system. 2. Displacement: Top speed 245 km/h, fuel consumption 9.9L/100km, emission standard: Euro 3, fuel type: 93 octane or higher unleaded gasoline. 3. Dimensions: Length, width, and height are 4841mm, 1846mm, and 1468mm respectively, wheelbase: 2888mm.
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