What Do the Speedometer and Odometer Mean?
1 Answers
The speedometer displays the current wheel speed of the vehicle in kilometers per hour (km/h), while the odometer shows the cumulative distance traveled by the vehicle in kilometers (km). The principle of the odometer is simple: since the diameter of the car's wheels is known, the circumference of the wheels remains constant. From this, the number of wheel rotations per kilometer can be calculated, and this number is also constant. Therefore, by automatically accumulating the number of wheel rotations and dividing by the number of rotations per kilometer, the distance traveled can be determined. Below are precautions for driving on highways: 1. Drive in the designated lane: Highway lanes are clearly marked, with dedicated lanes for large vehicles, small vehicles, etc. When overtaking, once you occupy a lane, return to your appropriate lane promptly after completing the overtake. Do not occupy other lanes for extended periods. Additionally, the emergency lane should not be occupied for non-emergency reasons. 2. Maintain a safe speed and avoid speeding: The dangers of speeding are well-known, as it can lead to irreversible consequences, whether on local roads or highways. 3. Maintain a safe following distance: Under normal conditions, when the road is dry and braking is effective, the following distance in meters (m) should not be less than the speed in kilometers per hour (km/h). For example, at 80 km/h, the distance should be no less than 80 m, and at 100 km/h, no less than 100 m. Always pay attention to roadside distance markers. In rainy, foggy, snowy, or wet road conditions, the following distance should be more than doubled. 4. Observe traffic signs: Always be aware of roadside and overhead signs and markings while driving, and stay appropriately to the right to avoid crossing the right lane divider, allowing sufficient lateral distance for overtaking vehicles. 5. Do not arbitrarily occupy the emergency lane in case of an accident: Traffic accidents are inevitable on highways. If other vehicles cause a blockage in the travel lane, do not occupy the emergency lane, as this may prevent rescue vehicles from performing their duties. 6. Avoid fatigued driving and take timely breaks: Fatigued driving is extremely dangerous on highways. When fatigued, the body's reaction time slows, making it difficult to respond correctly to sudden situations.
