Traveling from Pyeongtaek to Sintaein, the KTX (Korea Train Express) is the primary option available, although the route is not directly serviced by high-speed trains. Typically, passengers might need to take a combination of KTX and local trains. The KTX trains can reach speeds of up to 300 km/h on connecting routes, while local services operate at a lower speed, usually ranging from 60 to 120 km/h, making the overall travel time around 2 to 3 hours, depending on connections.