What are the main functions of urban roads?

[AniyahAnn]

Urban roads serve different functions based on their lane types. Expressways: Exclusively for motor vehicles; pedestrians and non-motorized vehicles are prohibited; feature median dividers of certain widths; have controlled access points. Major arterial roads: Form the backbone of urban road systems, connecting key industrial zones, residential areas, and city-wide public activity hubs, handling primary passenger and freight traffic. Main technical requirements include: typically no fewer than four lanes, with minimal high-traffic public buildings along the sides. Secondary arterial roads: Common traffic arteries found throughout urban areas. Branching from major arterials, they distribute across all city sectors, managing traffic flow dispersal from main roads and regional passenger/freight transport. Local roads: Extensively distributed access roads linking primary/secondary arterials to various traffic sources, including residential streets and alleys. Typically accommodate light motor vehicle traffic mixed with bicycles, featuring low traffic density.