空间句法扩展及其应用——以北京城区交通网络优化为例

Most of the cities all over the world have the problem of traffic jam, but the city of Beijing is probably one of the typical cities. Researchers and governments have applied the energies to finding a solution to solve the traffic problem in Beijing, but the effects are not satisfying. Space syntax theory and its mode to solve problems can provide instructive reference for analyzing the urban traffic problem. Based on analyzing the current condition of urban traffic network in Beijing, this paper was in virtue of space syntax method and GIS visualization technology, extended the space syntax theory, improved the axial map, and divided the traffic network according to road’s designation. We put forward the concept of Accessibility , discussed the disposing method for loops, and proved the optimizing measures which are supposed to revive the current traffic pressure in Beijing based on the iterative optimizing experiments. It is concluded that increasing radialized roads can help to improve the traffic status obviously of Beijing traffic network, which is in the framework of loops. Moreover, we had conducted different simulating experiments, such as adding 2 more, 4 more, 6 more, 8 more, and up to 14 more radialized roads in different directions. We had discovered that there is a critical of the added roads. Adding 6~8 more roads can lead to an optimal yield. In accordance with this finding, we selected the axial lines of roads on the spot according to the current urban planning, and had validated the feasibility and rationality of the optimizing method. It is concluded that building some new radialized roads and rebuilding some main roads are available for improve the traffic condition and the input-output ratio is better. Consequently, the extended space syntax method can instruct road reconstructing and urban planning, and be generalized to other cities.