The train service from New Taipei to Kaohsiung primarily utilizes the High-Speed Rail (HSR) system, specifically the Taiwan High-Speed Rail (THSR), which consists of different service types: the Puyuma and Tze-Chiang trains. The THSR is designed for rapid transit, reaching speeds of up to 300 km/h (186 mph) and covering the distance between these two cities in approximately 1 hour and 30 minutes. The Puyuma service is also an efficient option but operates at slightly lower speeds around 180 km/h (112 mph) and takes about 2 hours 40 minutes, making several stops along the way, including major stations like Taichung and Tainan.
In terms of comfort, both train options provide modern amenities with spacious seating arrangements, onboard refreshments, and power outlets. The High-Speed Rail is particularly suited for those prioritizing speed, while the Puyuma offers access to more intermediate stops, catering to travelers who wish to explore along the route. Overall, for a quick journey with fewer stops, the THSR remains the preferred choice for commuters and visitors alike.