Abstract:With the development of city, the municipal infrastructure in old urban area needs to be reconstructed and updated, and the road traffic is also increasingly congested. In the process of municipal engineering construction, the urban management department pays more and more attention to the traffic relief scheme of the roads. Therefore, the research, design and formulation of traffic relief plan during the construction of municipal engineering in the old urban area have a significant impact on urban traffic, which needs to be specially studied. The construction types of municipal engineering in old urban area, the influencing factors of traffic relief, the working ideas, the design principles, the classification of traffic relief schemes and the design processes are discussed, which can provide the useful reference for the planning and management departments, the design institutes and the construction units to formulate the reasonable traffic relief schemes.