Abstract
Inspired by the TOD important role in the theory and practice of urban spatial structure optimization process, learning from rural settlements unit size and spatial structure research, this article tries to build a new spatial structure of rural settlement patterns—Rural Road-Oriented Development, and systematically analyze the concept of meaning, construction principles, frameworks, type, spatial scales, etc. Simultaneously, this article demonstrates the reasonable size and structure RROD unit focus from the facility threshold, farming radius,neighborhood association and the travel distance perception. This article considers the general radius of the unit range from 450 m to 700 m, population size range from 1500 m to 3500 m people, covering general range from 30 hm2 to 75 hm2, distance general range from 3.5 km to5.0 km. However, due to the geographical ranges based on homogeneous and general development conditions assumptions, this conclusion has a general theoretical guidance. So, in practice, the ranges should be properly adjusted and modified according to the actual situation.
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