What is the minimum pavement width required for a 180° turn with a 5-ft safety margin?

The minimum pavement width required for a 180° turn, considering the specified 5-ft safety margin, is determined by the turning radius necessary for the maneuver as well as the addition of the safety margin.

For a standard vehicle, a typical turning radius might be around 53 feet. When planning for a safe and efficient turn, it's essential to take into account not just the turning radius of the vehicle but also the extra space needed for safety. The 5-ft safety margin is added to ensure that vehicles can clear the turn without risk of collision or going off the pavement.

When you calculate this, adding the 5-ft safety margin to the 53-ft turning radius yields a total required pavement width of 58 feet. This total allows adequate room for the vehicle to navigate the turn comfortably while also ensuring space for any potential issues that could arise during the maneuver.

Therefore, the correct answer is the minimum pavement width of 58 ft, which incorporates both the necessary turning radius and the additional safety margin for effective and secure navigation of a 180° turn.