Can You Open Windows on the Highway?
2 Answers
You can open windows on the highway. The situations in which windows can be opened on the highway and the effects of opening windows are as follows: Situations where windows can be opened on the highway: Opening one window on the highway is acceptable. If only the window on the driver's side is opened, the airflow inside the car will be relatively balanced, avoiding turbulence. The best position to open one window is the single rear window, especially when there are no passengers in the back seat. This allows front-seat passengers to enjoy suitable ventilation. In this case, opening a window is permissible, but it is not recommended for prolonged use on the highway. Effects of opening windows on the highway: When driving on the highway, it is actually best not to open the windows. Whether from a safety perspective, driving experience, or fuel efficiency standpoint, opening windows has negative impacts. Opening windows increases the vehicle's driving resistance, leading to higher fuel consumption compared to keeping windows closed. Additionally, wind noise from open windows can disrupt passenger conversations. Therefore, it is advisable not to open windows on the highway. If the car feels too stuffy, it is better to take a short break at a nearby service area and resume the journey after resting.
It is generally not recommended to open windows when driving long distances on highways. Although it may feel tempting to roll down the windows for ventilation during hot summers, the situation changes completely once the speed exceeds 80 km/h. Air resistance increases by more than threefold, the car body noticeably becomes unstable, and steering feels heavier. Most critically, the noise becomes so loud that normal conversation inside the car becomes inaudible. I once tried opening the windows for just five minutes—not only did my ears ring for the entire day, but fuel consumption also surged by 15%. If you truly feel stuffy inside the car, you can turn on the air conditioning in external circulation mode and slightly tilt the sunroof open. This method ensures safety without allowing strong winds to rush in. Occasionally opening the windows briefly is fine, but keeping them open throughout high-speed driving is both fuel-inefficient and dangerous.
