เสียงที่ใช้ร่วมกัน

If you drive ten miles above the speed limit since you're late, you likely believe that you're saving time. But at 70 miles an hour, it takes 51 seconds to travel a mile. And if you go 80, it takes 45 seconds, so you're just saving 6 seconds per mile. Now, you'll also reach slower cars sooner, which means you'll hit the brakes more a bit. You'll also change lanes, and you'll need to be more careful overall. And these small delays build up, and can quickly cancel out those few seconds you gained