Under favorable circumstances, how long can it take to stop a vehicle going 50 miles per hour with good brakes?

When considering how long it takes to stop a vehicle traveling at 50 miles per hour under ideal conditions with good brakes, the standard stopping distance is generally around 229 feet. This distance can vary based on factors like road conditions, tire traction, and driver reaction time, but under optimal circumstances, including a dry road and attentive driver, the stopping distance tends to be in this range.

The stopping distance includes both the reaction time (the time it takes for a driver to notice a need to stop and actually apply the brakes) and the braking distance (the distance the vehicle travels after the brakes are applied until it comes to a complete stop). When calculating stopping distances, various formulas and guidelines indicate that at 50 mph, the combined distance typically sums up to approximately 229 feet.

The other choices represent shorter distances that would not be achievable under typical circumstances at that speed, as they do not allow for adequate reaction time or the full braking distance required to safely stop.