Abstract
The entrance and exit area of parking facilities has the characteristics of high concentration of urban traffic and prominent traffic intertwining phenomenon, which easily induces rapid congestion of mixed heterogeneous traffic at specific times and local locations and quickly spreads to the entire road section or even a larger area. In order to better understand the congestion distribution characteristics and propagation effects of access section of the parking entrance and exit from the mid and microperspective, a 5 m ∗ lane width pixel grid is used to divide the frontage road research. It also proposes a spatially robust autoregressive model and complex network tools suitable for analysis of local traffic flow to analyze it. The results show that as spatial scale increases, the congestion propagation decreases sharply and spatial adjacency within the fourth order can account for more than 90% of the propagation; the frontage road to the entrance and exit is the place where the congestion first happens, and the congestion gradually attenuates as it propagates to the inner lane and the upstream of the road segments; the lateral congestion propagation attenuates faster, so the area affected by congestion is mainly distributed in the outermost lane. This paper can provide theoretical guidance for alleviating traffic congestion in the entrance and exit areas of parking facilities and has theoretical and empirical significance.
Highlights
Increasing car park [1], which exacerbates the contradiction between the supply and demand of urban parking, along with the lag of parking facilities planning [2,3,4] and other factors, causes more severe traffic congestion problems in the entrances and exits of parking facilities
Congestion first spreads from spontaneously congested spatial units to neighboring spatial units and from neighboring spatial units to second-order units. e continuous spread to the surroundings eventually leads to the proliferation and transformation of congestion. erefore, the spatial propagation effects of local congestion can be calculated by formula (37), and the distribution of congestion spatial propagation effects under different spatial adjacency numbers can be investigated and the spatial process of congestion propagation can be studied
Conclusions and Discussion is paper starts with studying the spatial evolution pattern of congestion propagation in the entrance and exit of a parking lot. It discusses the shortcomings of traditional spatial autoregressive model and proposes an improved robust spatial autoregressive model based on the actual characteristics of the traffic flow in the entrance and exit
Summary
Increasing car park [1], which exacerbates the contradiction between the supply and demand of urban parking, along with the lag of parking facilities planning [2,3,4] and other factors, causes more severe traffic congestion problems in the entrances and exits of parking facilities. Compared with other road facilities, the settings of entrances and exits of parking facilities can bring more complicated impact: on the one hand, due to the uncertainty of the occurrence and attraction of parking facilities, the temporal and spatial distribution of parked vehicles are more disorderly; the intermittently concentrated entering and departing of vehicles enhance the occasional disturbance to the road; on the other hand, the interwoven flow of incoming and outgoing vehicles, the traffic flow of the main road, and the flow of motor vehicles and nonmotorized vehicles [19] increase the heterogeneity of the traffic flow and the complexity of the occurrence of congestion in this area to a certain extent. At the macrolevel [20,21,22,23,24], traffic congestion is generally regarded as a process of compression, blockage, and spread of traffic
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