(1) cross section design should be carried out within the red line width of urban road planning. According to the road grade, service function, traffic characteristics, combined with various control conditions, saving land, reasonable layout.(2) the road cross section should meet the long-term traffic demand. Stage construction of near and far should be combined, so that the recent engineering has become a part of the long-term project, and reserve position, control the width of the road, to the long-term implementation of leeway. Construction of roads in built-up area should not be built in stages.(3) the road traffic should be taken to improve the road traffic and construction measures to be taken to meet the road capacity, to ensure traffic safety.(4) the road cross section can be combined with the terrain and buildings to meet the needs of different functions.
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