At present, more and more road traffic is gradually saturated, need to be remodeled or expanded, while promoting the transformation and maintenance of road projects, is a more reasonable and perfect plan, which helps to directly improve the utilization of resources, improve the quality of the project, reduce the comprehensive cost of the road life cycle, improve social and national economic benefits. Expansion and maintenance at the same time may be effective control measures, but blind expansion and unreasonable planning can not control construction costs, so we should fully consider the development of the local road network, reasonable forecast traffic volume.
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