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Two-dimensional electronic chart system can’t intuitively express the various information of 3D navigation environment, and the existing 3D electronic chart system lacks comprehensive display and scientific quantitative analysis. In that context, designed a 3D electronic chart system framework based on GIS and virtual reality technology (VR technology) and studied the key technologies such as visualization of 3D navigation environment, numerical simulation of water current and dynamic ship information display. Consequently, a 3D electronic chart system has been developed for Sutong Bridge section of Yangtze River waterway and it is verified to be feasible and reliable for ensuring safety of navigation.

Traffic demand management is an effective way to solve the problem of urban traffic congestion. Due to the effects of the social economic development, population quality, scientific and technological level and other related factors, the existing traffic demand management systems are lack of effective coordination and management mechanism. Although the traffic demand management measures have achieved some results, but due to lack of effective coordination and management mechanism between them, resulting in poor practical application. By analyzing and summarizing the current situations of traffic demand management, the paper explores an innovative traffic demand management mechanism based on comprehensive traffic planning and modern information technology and economic means. Under the new demand management mechanism, the urban transportation system runs more orderly, which can help to largely increase residents' travel satisfaction and social and economic benefits. On the basis of analyzing and summarizing the current research status of traffic demand management, this paper conducts innovative research on traffic demand management mechanism based on the implementation effect of existing traffic demand management. In view of the existing shortcomings in the systematic and scientific traffic demand management, and insufficient traffic law enforcement quality problems, the paper explores the innovative traffic demand management mechanism based on comprehensive transportation planning, modern information technology and economic means.

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