Legal basis: the integrated development plan of higher quality transportation in the Yangtze River Delta region has greatly improved the comprehensive transportation service capacity. Passenger service between central cities ranges from 1 hour to 1.5 hours, and Shanghai metropolitan area and Nanjing, Hangzhou, Hefei, Suzhou, Wuxi and Ningbo metropolitan areas enjoy 1 hour bus commuter passenger service. The average annual growth rate of railway and waterway freight volume is not less than 5%. The integrated development mechanism is more perfect, the cooperative construction mechanism of three provinces and one city is more perfect, the integrated operation and management mechanism of intercity rail transit has made a breakthrough, and the coordinated development of civil aviation and ports has made greater progress, forming the Yangtze River Delta model of reform and innovation of transportation integration system and mechanism. The development level of intelligent green security has been greatly improved. The sharing rate of green travel in the central city of big cities has exceeded 65%, and information services are basically used for * * * *, and the joint prevention and control of traffic environmental pollution and emissions has achieved positive results.