In recent years, demand has arisen for energy-saving and environmentally-friendly snow-melting systems to make roads safe and easy to drive on in snowbound areas. For the past 10 years, Misawa Environmental Technology has been working on a sprinkler-free snow-melting system called the Borehole Heat Exchange System (BHES). This system uses geothermal energy (from a depth of 50 to 150 meters), one of the most stable natural energy sources. A study was conducted that verifies the system's snow-melting effectiveness and reliability, as well as a long-term follow-up study to confirm the system's energy-saving and environmentally-friendly characteristics based on its yearly thermal energy budget. The study findings are based on measurements of weather observation, ground temperature, circulating fluid temperature, road surface temperature, and similar data. This report presents these findings on BHES: (1) BHES can completely melt snow on road surfaces for snowfalls of up to 25 cm/day with snowfall rates of up to 2 cm/hour; (2) BHES can prevent road surface freezing in outside air temperatures as low as minus 6 degrees centigrade; (3) BHES can provide a stable heat supply throughout the winter, with no yearly drops in the amount of heat supplied; and (4) BHES provides efficient use of natural energy, and can greatly reduce the rates of primary energy usage and CO2 emissions. In future, geothermal, solar, and other natural energy sources will play a large role in road snow-clearing systems. The design of these systems must consider the need for passable roads in snowbound areas, environmental preservation, and the maintenance of access to amenities in the community. It is believed that this study will serve as a foundation for the systems of the future.