A vehicle includes a door, an inside door handle, and a door opening warning system having an object sensor that detects an object outside the vehicle in a door collision risk zone, a touchless sensor that detects if a part of a user is positioned in an opening zone at the inside door handle and a touch sensor that detects if the user touches the inside door handle, and a control unit. The control unit triggers a first alarm if the object sensor detects an object in the risk zone and the touchless sensor detects a part of the user in the opening zone at the inside door handle, and triggers a second alarm if the object sensor detects an object in the risk zone and the touch sensor detects that the user is touching the inside door handle.