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公路路线走廊带(通道)选择是公路建设步入实质性阶段的第一步,也是公路建设非常关键的一步。公路路线走廊带是指公路路线所经沿程影响的区域,是一个带状走廊,其数量与拟建项目规模(长度)有关(拟建规模越大,走廊带条数越多,范围越宽)。走廊带的合理性,不仅直接影响,甚至决定工程建设规模、投资、工期、质量、抗灾防灾能力,而且影响或者说限制公路的影响辐射面、辐射范围,辐射人口、路网结构、路网密度、路网地位,以及公路的社会效益、运输效益,沿程经济、城镇规划和发展方向。特别是中西部山区高速公路,由于山区地形、地质复杂,虽然可通走廊不少,但可行走廊不多,经济合理走廊更少,甚至是唯一的,再加上路网密度小,辐射影响面少,带动沿程经济发展和影响力度相对较小。由此,走廊带的选择显得更加重要。
Highway route corridor belt (channel) choice is the first step in the road construction of a substantive stage, but also road construction is a crucial step. Highway route corridor zone refers to the highway route affected by the area along the way, is a belt corridor, the number and the proposed project size (length) (the larger the scale of construction, the more corridor with the number, the wider the scope ). The rationality of the corridor belt not only directly affects or even determines the project construction scale, investment, construction period, quality, disaster prevention and disaster prevention capability, but also affects or limits the impact of the road radiation, radiation, radiation population, road network structure, road network Density, road network status, as well as the social benefits of roads, transport benefits, economy along the route, urban planning and development direction. Especially in the central and western mountainous expressways, due to the mountainous terrain and complicated geological conditions, although there are many corridors, few viable corridors and fewer or even more economical corridors are possible. Coupled with the low density of road network and less affected area of radiation , Driving along the economic development and influence is relatively small. As a result, the choice of corridor belt is even more important.