Minimum pavement width for a 180-degree turn is 75 ft.

• A. 60 ft
• B. 70 ft
• C. 75 ft
• D. 80 ft

Answer: (C)

To complete a 180-degree turn you need enough width for the vehicle to sweep a circle as it turns. The key factor is the outer wheel path, which determines the turning circle’s diameter. For the standard vehicle profile used in this test, that full semicircular arc fits within a circle 75 feet in diameter. So the pavement must be at least 75 feet wide to allow the wheels to follow their arcs without hitting curbs or encroaching on other space. Wider than 75 feet, like 80 feet, would still work, but 75 feet is the smallest width that safely accommodates the turn. Smaller widths would not provide enough clearance for the turn to be completed.