Kim Jong Un travels by train primarily for reasons of security, comfort, and tradition. His train, known as the "Taeyangho" (Sun Train), is heavily armored and bulletproof, featuring advanced security measures such as a lead locomotive that runs ahead to clear the track of obstacles, and accompanying security trains. The train acts as a mobile fortress with facilities for communication, meetings, and personal comfort, allowing him to securely govern while traveling. This preference also has historical and symbolic significance, as Kim Jong Un follows the tradition of his father, Kim Jong Il, and grandfather, Kim Il Sung, both of whom preferred trains over planes largely due to fears of flying and the greater safety trains provide. In fact, Kim Jong Il was known to be afraid of flying, which strongly influenced the family's travel habits. The train is used for both domestic and international travel, including journeys to Russia and China, and it is equipped with luxurious amenities such as banquet rooms and conference spaces. Overall, the combination of heightened security, comfortable and comprehensive on-board facilities, and the desire to honor family tradition explain why Kim Jong Un prefers train travel.