影响选择高速公路位置的因素
1.交通 /旅行导向和目的
来自各种研究的交通规划师可以预测拟议高速公路替代位置的旅行模式的影响。他们还分析了高速公路网络中新链接的可能效果。这允许位置工程师确定替代位置与现有网络的适合程度。
2.土地使用
It is a major factor affecting the pattern of traffic generation is an urban areas. For urban highway the commercial, residential and industrial areas are too considered. Although the highway should be designed for peak hour volume and the travel patterns vary with time of day, day of weak. Season of the year also has effect in other ways.
Industries and common areas relying heavily on truck transportation need service by arterial routes. Health and safety require avoiding heavy traffic in residential areas. Aesthetic values are also considered in an urban highway.
3. Parking Facility for Vehicles
For highway location in an urban area the existing parking facility should be considered. Ideally the location should be close to existing and potential parking areas to avoiding the amount of travel on existing street.
4. Already existing Transportation System
为了提高城市区域干扰中的整体运输服务水平，应考虑与其他运输系统的互动。
5.地形和地质学
与农村地区相同的重要性。由于高速成本，道路不应通过的某些区域。
6. Sociological, Historical and Environmental factors
- 不应该为住宅nei提出位置ghborhoods or create barriers b/w residential and other community service.
- Open public land should be retained as far as possible.
- Park an residential land should be used only if there is no alternate location can serve as stabilizing force by screening the traffic from residential communities.
- Further relocation of utilities where depressed highway and under pass are involved can add greatly to the cost.
- The procedure for locating urban highway are much less uniform and fixed e.g. there may be prior surveys and maps made for property location, street improvement or other purposes which furnish most of the information that will be gathered by reconnaissance. In many instance the data may be complete and accurate enough that no preliminary survey is required.
- 航空照片也是主要的侦察，避免了高成本高的高度发展区域。
- Just as in rural areas, location survey consists of staking and referencing the center line, taking profile, and cross-sections, and determining the location of all cultural and property movements.
- Considerable time is needed for locating surface and underground utilities, so that construction plans can include provision for their location.
- Problems can be minimized by employing large scale vertical aerial photographs and maps made from the photographs by photogrammetric survey.
