<p>Preventing collisions between urban air mobility (UAM) vehicles and obstacles through effective corridor design is critical for ensuring operational safety. Consequently, maintaining adequate separation from obstacles is a key element of corridor design that necessitates the establishment of clear design standards. This study proposes new corridor design standards with the aim of ensuring the operational safety of UAM vehicles. Two operational zones are defined: the normal operating area, in which UAM vehicles operate under normal conditions, and the recovery area for safely returning to the original route after deviations. Using these definitions, a methodology was established for calculating the semi-area width (1/2AW). Furthermore, a sensitivity analysis was conducted to assess the impact of UAM vehicle performance categories on this width. A collision risk assessment was performed to determine the minimum 1/2AW required to satisfy the target level of safety for each speed and bank angle category. The results of the sensitivity analysis demonstrated that variations in the UAM cruise speed and bank angle significantly affect the 1/2AW. Based on the collision risk assessment, minimum 1/2AWs are proposed for UAM vehicle performance categories. The established corridor design standards provide a framework for minimizing collision risks in UAM operations, thereby ensuring safer integration of UAM vehicles into urban airspace.</p>