Research On The Theory And Method Of Bus Rapid Transit Network Planning In Urban Area

At present, the economy of our country is developing fast, and the mobility level in urban increases greatly. Many big cities are planning and constructing railway system, which belongs to Mass Rapid Transit System. But the construction of railway system is expensive and it should go through a relative long period, railway system can not solve the traffic problem immediately. Because Bus Rapid Transit (BRT) is relative cheap and its construction is rapid, it has caught many people's eyes. In the cities where BRT has brought into use, BRT plays an important part on relieving traffic pressure, optimizing travel modal split, leading land development and boosting city sustainable development.Firstly, the exterior conditions for BRT operation, include road grade, numbers of motor vehicle lanes, location of bus lane, intersection bus priority transit, station layout, are studied. Then BRT's transport power is discussed, as well as the corridor feature for BRT operation. On the basis of analyzing the exterior conditions, BRT's adaptability is studied. After pointing out the locations where BRT can be applied, some suggestions about road transect configuration are set out.Mass Rapid Transit System (MRTS) include subway, LRT and BRT, and so forth, one or several types of which are the components of transit skeleton network. After introducing MRTS'components and features, MRTS'future is discussed. It has been proved that developing BRT can get lots of benefit. The characteristic of cities which BRT is suitable for is analyzed, and the relation of BRT and other MRTS is set forth.The transit skeleton network should be spread all over a city, and support the transit network. After analyzing the layout methods of railway network, the idea and feature of layout planning of transit skeleton network, mainly composed of BRT lines, are indicated. An old model on the scale of transit skeleton network is improved, and a new method is presented. With population and employment data, a method on layout planning of transit skeleton network is established, using morphology for reference.Before selecting corridors for BRT operation, forecasting the passenger volumes in transit skeleton network is necessary. The traditional four stage method should be improved, and a combination model is established. According to BRT's feature the strategy for selecting BRT corridor is discussed. BRT's exterior effect is also analyzed, and the concept of economic scale of BRT network is set forward.With some examples in other cities, the layout methods of BRT lines is concluded. Because transit network is a type of complex network, to make research from the view of network topology is feasible. After introducing the theory of the Small World, BRT network analysis is carrying out. A method on layout planning of BRT lines is studied, in which the Genetic Arithmetic is applied.Finally, an evaluation index system about BRT schemes is established, which includes network...