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Primarily during long stretches of driving when not in stop-and-go traffic. As for why, there's a number of reasons.

  • Maintaining a consistent speed
  • Fuel efficiency (yes, the cruise is more efficient)
  • Keeping your speed under control. This is a big one for me, as I tend to have a heavy right foot. Especially when I was running 18 wheelers over-the-road.
  • Takes pressure off your ankle and joints in your foot.
  • More power. Some heavy duty commercial vehicles have engines which have two horsepower ratings - the higher horsepower rating typically goes into effect with the cruise control engaged. This encourages drivers to use the cruise control, allowing the vehicle to run more efficiently.
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Q: When and why would you use cruise control?
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