What are the advantages and disadvantages of on-demand four-wheel drive on snowy and icy roads?

1 Answers
DelCecilia
07/30/25 12:16am
On-demand four-wheel drive has the following advantages and disadvantages when driving on snowy and icy roads: 1. Advantages: On-demand four-wheel drive provides better traction at high speeds, with less tire slippage under high torque. The four-wheel drive system also helps to some extent in suppressing side slips on slippery roads and improving vehicle tracking. 2. Disadvantages: Most on-demand four-wheel drive systems are limited by structural flaws when transferring power between the front and rear axles, unable to deliver more than 50% of the power to the rear axle, resulting in incomplete power utilization. Comparatively, the active safety of on-demand four-wheel drive vehicles is not as high as that of full-time four-wheel drive vehicles.
Was this review help?
10
2
Share
More Forum Discussions

Why don't 4S shops apply front windshield film?

4S shops do not apply front windshield film to save costs. If the 4S shop promises to provide full-car film when purchasing a car, it should include the front windshield film. If the front windshield film is not applied when picking up the car, you can request the 4S shop to apply the front windshield film according to the contract. Currently, there are roughly four types of car films on the market. The first type is the coating process film, which still exists in small quantities on the market; the second type is the dyeing process film, an outdated process, but still widely available on the market; the third type is the vacuum thermal evaporation process film, a relatively common explosion-proof film; and the fourth type is the multi-layer magnetron sputtering spectral selection film, which is a higher-end process film on the market.
19
2
Share

How to Handle 12 Points Deducted from Driver's License?

If 12 points are deducted from your driver's license within one scoring cycle, you must attend a 7-day training on road traffic safety laws and related knowledge at the traffic management department of the public security authority in the jurisdiction where the driver's license was issued or where the traffic violation occurred. After the training, you will need to retake the Subject 1 exam, which is the same as the exam for new driver's license applicants. If you pass the Subject 1 exam, the deducted points will be cleared, and your driver's license will be returned. If you fail the exam, you will need to retake the training and exam. The full name of a driver's license is Motor Vehicle Driver's License. If a driver has not accumulated 12 points in any scoring cycle during the 6-year validity period of the license, they will be issued a 10-year validity driver's license. If the driver has not accumulated 12 points in any scoring cycle during the 10-year validity period, they will be issued a long-term valid driver's license.
10
5
Share

Are car turn signals up-right-down-left?

Car turn signals follow an up-right-down-left pattern. From the driver's perspective, up corresponds to the right turn, down corresponds to the left turn, pushing away activates the high beam, pulling closer activates the low beam, and a push-pull motion alternates between high and low beams. When observing a need to turn ahead while driving, it is essential to activate the turn signal approximately 10 seconds in advance to alert vehicles behind to take timely measures, such as slowing down, stopping, or waiting, to avoid collisions or even rear-end accidents. As signal lights, turn indicators primarily serve to inform surrounding vehicles of the driver's intended direction change during daily driving, prompting other vehicles to yield and prevent collisions. Therefore, whether turning, changing lanes, overtaking, starting, or parking, whenever the vehicle needs to steer away from its current lane, the turn signal should be activated in advance. This is a fundamental principle of safe driving.
13
3
Share

Will driving without compulsory traffic insurance result in a 12-point deduction?

Driving without compulsory traffic insurance does not result in a 12-point deduction, but a 1-point deduction. Additionally, if caught by traffic police while driving without compulsory traffic insurance, the following penalties will be imposed: 1. A fine of twice the original cost of the compulsory traffic insurance must be paid; 2. The vehicle will be impounded until the compulsory traffic insurance is purchased. If the vehicle owner discovers that the compulsory traffic insurance has expired, renewing it within 3 months will still allow for a discount. However, if the renewal is delayed beyond this period, the discount will no longer be available, and the renewal process will become more complicated. If the compulsory traffic insurance was not paid for the previous year, there is no need to make up the payment for the current year. During the first 6 years of a new vehicle, inspections are required every 2 years, meaning that if the compulsory traffic insurance is not paid for 24 months, the vehicle will not be eligible for annual inspection. Furthermore, if the compulsory traffic insurance expires and the owner has not purchased commercial insurance, in the event of an accident, the owner will face substantial compensation costs, all of which must be borne by the owner themselves.
12
5
Share

What vehicles can be driven with an A2 driver's license?

A2 driver's license is authorized to drive tractor vehicles, which can tow heavy-duty and medium-duty full trailers and semi-trailers. Other vehicle types that can be driven with an A2 license include: B1 (medium-sized buses), B2 (large trucks), C1 (small cars), C2 (small automatic transmission cars), C3 (low-speed trucks), C4 (three-wheeled cars), and M (wheeled self-propelled machinery). According to the relevant provisions in the Ministry of Public Security Order No. 123 on the application and use of motor vehicle driver's licenses, among the full trailers and semi-trailers driven with a legally valid A2 driver's license in China, a full trailer is one where the total weight of the trailer is borne by itself, while a semi-trailer is one where part of the total weight of the trailer is borne by the tractor vehicle.
12
0
Share

What Are Some Tips for When the Key Won't Come Out?

Tips for when the key won't come out: 1. While gently turning the key with your right hand, wiggle the steering wheel left and right with your left hand, and the key should turn; 2. Check if there are any obstructions in the gear slot. If so, remove them, then start the car, shift the gear again to ensure it's fully back in position, and the key should come out. Reasons why the key won't come out: 1. The key can't be turned after insertion because the steering wheel wasn't returned to its proper position during the last parking, causing abnormal locking of the steering wheel; 2. The key can't be removed after turning off the engine because the automatic transmission isn't fully in the P (Park) position, failing to trigger the electronic sensor, or there are objects like coins in the gear slot blocking it from returning to position.
17
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.