The Analysis Of The Road Network Status Based On The Road Traffic Delay

As one of the main factors for the socio-economic, the transport network's stability is directly related to the development of the national economy. The city's traffic congestion problems get worsening with the raising of the urban economy and motorization. Gradually the congestion of the road or intersection evolved into regional network congestion. To solve this problem, we should evaluate and analysis the traffic situation in urban traffic network, and on this basis, formulates appropriate management measures. Currently, the state evaluation of the road traffic has been more mature; however, the study of the evaluation of the regional road network traffic conditions also not much. Existing research results, mainly to network reliability, average network traffic flow parameters such means to evaluate the road network traffic conditions. So this paper combined with road network traffic characteristics, use the road network delay per unit distance which physical meaning was specific as the state of network traffic evaluation method.Based on the above analysis, this paper analysis the traffic flow conditions based on the expressway traffic flow data collected by microwave detector. And establish a road transport delay calculation which based on the road speed distribution curve and the sub-modal traffic flow theory. And this paper proposed the road network delay per unit distance as the evaluate index, to evaluate the level of road delays. And according to subjective assessment of road traffic service level of grading standards, this paper developed the grading standards of the delay, and determine the congestion state of the delay in grading standards. And the study of the distribution of congested road in the road network was based on these works.Based on this algorithm, this article discussed two different object-oriented road network delay indexes. The road network overall average delay per unit distance index is targeted traffic management, and it was designed to provide road network traffic management delays the macro level assessment, and to support the traffic management to development the macro traffic management measures. Road network average delay per unit distance OD pathway is designed to provide travel choice travel path, travel time delay estimation and the evaluation of the path delay for the travelers. The article finally uses the Beijing traffic data in working day and weekend, analysis the method and examples of calculation of the delay calculation algorithm. And on this basis, the selected instance of the regional road network traffic conditions is evaluated.