What gear should be used for lane change in Subject 3?

1 Answers
ZoeyDella
07/29/25 11:38pm
For left lane changes in Subject 3, you can use 3rd gear or higher. Generally, 3rd gear is suitable for speeds of 20-40 km/h, 4th gear for 40-60 km/h, and 5th gear for speeds above 60 km/h. The gear selection should also align with the speed requirements of the left lane. For example, if the left lane requires speeds of 40-60 km/h, you can use 4th gear for the lane change. For right lane changes, you can maintain your current gear and gradually merge into the right lane. Once fully in the lane, you can downshift by one gear. Lane change precautions: When changing lanes, drivers should carefully observe traffic conditions. Before changing lanes, pay attention to the size of the following vehicle in the rearview mirror to estimate the distance. To ensure safety, practice mutual courtesy during lane changes. After signaling with the turn indicator, if the following vehicle honks or turns on hazard lights to indicate disagreement, wait for it to pass before changing lanes. Additionally, vehicles merging from auxiliary roads must yield to vehicles already on the main road, and vehicles entering a roundabout must yield to those already inside. New traffic regulations clearly state that lane changes must not affect the movement of vehicles in the target lane. When driving on curves, prioritize safety over speed and minimize lane changes. Exercise extra caution when changing lanes on slippery roads during rain or snow.
Was this review help?
19
4
Share
More Forum Discussions

What does the ESC malfunction warning mean?

When a car displays an ESC system malfunction warning, it means there is a fault in the Electronic Stability Control system, and the vehicle's electronic stability control is not functioning. This fault can be triggered by software system alarms, or it may be caused by sensor failures or short circuits in the wiring. Diagnosing the issue can be complex, so it's important to visit a 4S dealership promptly for inspection and repair. The role of the ESC system: When the ESC system is activated to correct vehicle stability, it reduces the speed, so pay special attention to road conditions. The ESC system is only a supplementary safety feature for the vehicle. If the car's instability exceeds physical limits, it cannot be controlled. Do not rely solely on the system—always drive safely. When the ESC is active, you may hear some noise from the brake pedal or feel slight vibrations in the corresponding systems. These are caused by pressure changes within the system. Overview of the ESC system: ESC is an Electronic Stability Control system and a supplementary safety system that helps prevent dangerous situations. During sharp turns or lane changes when the vehicle becomes highly unstable, it compensates for stability by applying the wheel brakes or controlling engine torque.
18
3
Share

Are Large Vehicle Tires Tubeless?

Large vehicle tires are not necessarily all tubeless; most use steel-belted tires. The specific reasons are as follows: Tubeless tires have poor load-bearing capacity. Large trucks, with cargo and their own weight, typically weigh at least 20 tons, which tubeless tires cannot support. Steel-belted tires, on the other hand, can handle varying loads without issues and have a longer lifespan. Steel-belted tires feature a fine steel wire mesh within the tire's rubber layers, along with an inner rubber tube, enhancing the tire's load-bearing capacity. Methods to identify whether a large vehicle uses tubeless tires: Method 1: Valve. A tubeless tire has a rubber seal underneath for sealing, whereas a regular tire has a screw. Method 2: Inflation. A tubeless tire consists of only one outer layer. When inflated, the inner ring tightly expands onto the rim, defining a tubeless tire. Since tubeless tires lack an inner tube, the air intake is on the rim, allowing direct inflation through the rim. Method 3: Lettering. The sidewall of a tubeless tire will be marked with "TUBELESS" or "TL."
11
5
Share

What Causes Cracks on the Side of Tires?

Tire sidewall cracks can be caused by: 1. Natural aging—prolonged exposure to sunlight and weather conditions leads to rubber degradation, resulting in cracks over time; 2. Impact damage—frequent driving on rough or gravel roads may cause minor impacts. While slight damage is generally safe, severe impacts require immediate tire replacement. As a critical automotive component, tires directly contact the road surface and work with the suspension system to absorb shocks, ensuring ride comfort and smooth driving performance.
6
2
Share

What Causes the Emission System Fault Light to Illuminate?

The reasons for the emission system fault light to illuminate include: 1. Poor fuel combustion state, where fuel is not burned or burns incompletely, causing engine knock and excessively high internal engine temperatures; 2. Poor fuel quality, leading to unclean engine cylinders and accumulated carbon deposits; 3. Faults in the oxygen sensor itself or its wiring, or faults in the sensor control unit. If this fault light comes on while driving, it indicates that the engine parameters will change, and the engine may lack power or shake severely. In such cases, it is necessary to visit a nearby repair service station for engine inspection and maintenance. If this issue is not resolved promptly, the engine combustion state will not return to normal.
2
3
Share

Is the Regal a B-segment car?

The Regal is a B-segment car. The Buick Regal is a mid-to-high-end sedan from Buick, positioned between the Excelle and LaCrosse. A-segment cars: A-segment cars refer to compact sedans, such as the Focus and Corolla. Vehicles in this segment typically have a body length between 4.3-4.79 meters, a wheelbase of 2.35-2.79 meters, and engine displacements generally ranging from 1.4 to 2.0 liters. B-segment cars: B-segment cars refer to midsize sedans, such as the Accord, Passat, and Camry. These vehicles typically have a wheelbase between 2.7-3.0 meters, a body length of 4.8-5.0 meters, and engine displacements generally ranging from 1.5 to 2.5 liters. C-segment cars: C-segment cars refer to premium sedans, also known as executive cars, such as the Mercedes-Benz E-Class and BMW 5 Series. Vehicles in this segment typically have a wheelbase of approximately 2.8-3.0 meters and engine displacements ranging from about 2.0 to 3.5 liters.
16
1
Share

Can You Use Alcohol as a Substitute for Gasoline in a Car?

In extreme situations when a car runs out of gasoline, alcohol can be used as an emergency substitute, but it may cause severe damage to the vehicle. This can lead to increased fuel consumption and varying degrees of reduced engine performance. Ethanol gasoline can also cause corrosion to non-ferrous metals and rubber materials in components such as the fuel tank and carburetor. When using alcohol for disinfection, ensure there are no open flames nearby, control the amount of alcohol used, and avoid high air-alcohol concentrations to prevent explosions. Methods to handle a car running out of fuel: 1. Call for professional assistance; 2. Arrange for a tow truck.
20
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.