High-speed rail (HSR) offers significant advantages over air and car travel, primarily centered on efficiency, sustainability, and regional connectivity. Unlike flying, HSR stations are typically located in city centers, eliminating the time and cost associated with long airport transfers and early security check-ins. It is widely considered the most environmentally friendly mode of mass transit, emitting significantly less CO2 per passenger than airplanes or private vehicles. Socially, HSR facilitates the "decentralization" of major cities by allowing people to live in more affordable regional areas while maintaining a reasonable commute. In 2026, many networks have also integrated high-speed 5G connectivity, making the train a more productive environment for business travelers. Additionally, HSR projects stimulate local economies by creating thousands of construction and operational jobs and boosting tourism in smaller towns that were previously hard to reach.