Research on Density Planning of Urban Branch Road Network Under the Narrow Road with Dense Network Mode
Being capillaries of the road system,the urban branch roads are the main support for improving the ac-cessibility of land transportation as well as a very important component of the road system.However,the lack of rigid control over branch roads in urban planning often causes lagging branch road construction and insufficient road net-work density.In order to adapt to the urban road layout concept of"narrow roads with dense road networks",ensure smooth accesses to the main road system and continuous convenience of the slow traffic system,a systematic study was conducted on the branch road network.The main research conclusions are as follows:① The urban zoning method for branch road systems was proposed to divide cities into six functional types;②The interval and recom-mended values for the control indicators of each sub district branch road network were proposed to facilitate the im-plementation of detailed control planning;③The determined control indicators of the branch road network were calculated as examples within the downtown of Tangshan,and the results showed that the research indicators were reasonable.A planning approach combining rigid control and elastic control was proposed to adapt to uncertain factors.
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