At the beginning of this paper, the structure, workflow, and development condition of global Traffic Flow Guidance System are introduced. Then the Route Optimization Choice algorithms classification and structure are summarized.
The traffic flow forecast service and the selection of optimal path service were built. The research shows that the performance of Traffic Flow Guidance service has greatly improved with the sharing and optimal of computing resource.
By Visual Basic 6.0, monitor computer software of the system is completed, the program of system's self-diagnoses of controlling is worked out and the operation of traffic inducement and controlling under the three operations state of freeway tunnel is realized.
According to the actuality of freeway tunnel traffic inducement and controlling system, in the basis of the freeway tunnel impact and control development flat- form, the paper puts forward a new strategy and accomplishes the traffic inducement and controlling based on it by programmable logic controller (PLC).
The influential factors of the expansion of city space within the city circle include natural limitation,human direction, traffic inducement,andeconomic direction. These factors interact on each other,forming a mode of vector,overcast and conformity.
Firstly, considering of the category the ITS belonging to, the passage analyzes the status of the ITS. Secondly, thinking about the causes of the traffic problems, the paper also takes the effect range of ITS into account. At last, taking the traffic control and traffic inducement for example, the article shows that the traffic system must be integrated.