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近年来,随着城市建设事业的发展,在道路交叉口修建了不少宏伟的构筑物,那就是城市道路的立体交叉,又称立交桥。立体交叉可使各相交道路上的车辆在保持原有行车速度的情况下,互不干扰地通过交叉口。它不仅能保证行车安全,还可有效地提高交叉口的通行能力。所以,立体交叉是解决城市交通问题的有效措施之一。
In recent years, with the development of urban construction, many magnificent structures have been built at road intersections, that is, the three-dimensional intersection of urban roads, also known as overpasses. The three-dimensional intersection allows the vehicles on each intersecting road to pass through the intersection without interference while maintaining the original speed of the vehicle. It not only guarantees traffic safety, but also effectively improves the traffic capacity of the intersection. Therefore, three-dimensional intersection is one of the effective measures to solve urban traffic problems.