KTX has its dedicated tracks or platforms in train stations across the Republic of Korea. We bought single-day tickets and took convenient KTX to travel by bullet train, criss-crossing the country. (Letskorail. com is more for people who want to buy multiday flex passes, and watch for sc ams!) The Korea Train Express or KTX runs before 7 a.m. from Seoul to Mokpo in Jeolla province, where the regular sea terminal or ferry to Jeju is also located. (Mugunghwa and S-train special for tourists from Haeundae or Bujeon may have bicycle racks, at least if a cafeteria car is attached.) Paying $50-$80 for an eSIM phone plan is necessary to book tickets online at Korea Railroad Corporation’s website; booking is only possible within 30 days of travel from Mokpo on the Honam line, or from Busan on the Gyeongbu express line. Before Busan’s biennial Wave event— happening until Nov 6, we travelled between this 2nd largest city on the East coast and Seoul. It would have been a 6-day (600 km) ride on the dedicated lanes of a river cycling route; but instead, it lasted less than three hours by train to reach our destination. In that way, we avoided the torrential path of Typhoon Hinnamnor. At the station’s ticket counter, we presented Visa cards to pay Korea Railroad (Korail), which operates the speedrail Korea Train Express (KTX). It can also be reached at (+822) 1544-8545 or 1544-7777 in the morning or noon hour, but with restrictions: especially Sept 8-12 with limited customer service an additional week, due to the annual holiday or Harvest Festival called Chusok. By checking on the overhead boards for the lit-up train number and departure time, it is possible to find the track number for KTX at the far right. Be sure to ask for KTX and carry a little cash ($4,$7,$10 equiv. Korean Won values, accepted by SK’s T-money pass), hopping onto a subway or transit; then between Seoul and Busan, the duration of your train ride will be cut to less than half or 2.5-hour duration (paying less than $60 for an economy KTX seat, e.g., $239 for a family of four). Seats can sell out fast, and there are no night trains past 10:30 pm. In Busan station, take the escalator up one level for ticketing and another level higher to purchase a filling meal for a good price ($10-12 at various restaurants). Tracks below are listed by groupings for regular Munghwa trains or S-trains for tourists. However, speed trains are behind the KTX gate with escalators descending to numbered platforms below, so watch the overhead signage. Even if someone forgets to pack anything, the electronic vending machine in-between KTX cars sells $1 beverages, snacks or $9 flash device and charging by credit card. Reclining row seats and family seating, each with a dining table, is available in economy train cars, listed on the car door and at the top of your KTX ticket. The convenience ontop of speed is unbeatable. Announcements are provided in English, Korean, Japanese and Chinese. Load Google Translate or at least Kakao Maps on your phone/loaner at Incheon Airport, and you’ll be set to travel Korea in a cinch!