Yang Bian

Method to Determine Pedestrians Level of Service for Unsignalized Intersections

This paper aims at developing a Level of Service (LOS) model for unsignalized intersection crosswalks for pedestrians from the perspective of the pedestrian’s perception of comfort and safety in unsignalized intersection environment. Firstly, the potential primary factors influencing pedestrian LOS at crosswalk were summarized from three respects: traffic conflicts, crossing facilities and delay. Secondly, data for the model were collected, including 459 participants’ real-time sense of comfort and safety when they crossing the 11 selected intersection crosswalks and the design and operational characteristics of the selected intersections. The selected crosswalks were typical of those prevalent in the urban areas of China, and the participants of questionnaire survey covered a broad cross section of Chinese population of pedestrians. Based on the survey data, Pearson Correlation analysis and step-wise regression analysis were carried out to develop pedestrian LOS model for unsignalized intersections. A reliable, statistically calibrated pedestrian LOS model for unsignalized intersections was developed, suitable for application in the vast majority of Chinese urban areas. The study revealed that the factors significantly influencing pedestrian LOS at unsignalized intersections included: left turning bicycles from side streets, through bicycles from side streets, right turning bicycles from side streets, left turning bicycles approaching from the street parallel to the crosswalk, through bicycles from the approach opposite to the crosswalk, right turning bicycles from the street parallel to the crosswalk, through bicycles from the approach opposite to the crosswalk and the presence of the median.

Evaluation on Urban Public Transit Operational Level of Service Based on Public Transportation Priority Strategy

This paper started from the perspective of the implementation effect of public transportation priority development strategy, and studied on the evaluation of urban public transit operational level of service, then whether the strategy was well put into effect could be examined. On the basis of the existing research on the evaluation index of public transit operational level of service, this paper carried out a microscopic level of service evaluation on public transportation priority strategy. Then the effect of the strategy was analyzed from the level of passengers’ satisfaction. At last, the result of this strategy was examined by the increasing of proportion of the public transportation travelers. Finally, according to the establishment of the index system, it was analyzed respectively from the two aspects of objective and subjective with the combination of AHP and passenger satisfaction survey. Then the grade of urban public transit operational level of service could be obtained.

Method to Determine Pedestrian Level of Service for the Overall Unsignalized Midblock Crossings of Road Segments

This paper aims at developing a pedestrian level of service (LOS) model for the overall unsignalized midblock crossings of road segments from the perspective of the pedestrians perception of safety and convenience in Chinese midblock crossing environment. Firstly, the potential primary factors influencing pedestrian LOS at unsignalized midblock crosswalks were summarized from four respects: traffic conflicts, the distance between crosswalks, crossing facilities, and delay. Secondly, 948 participants’ real-time sense of safety and convenience when they were crossing the 30 selected unsignalized midblock crosswalks and the design and operational characteristics of the selected road segments were collected. The selected midblock crosswalks were typical of those prevalent in the medium-sized urban areas of China, and the participants of questionnaire survey covered a broad cross section of Chinese population of pedestrians. Finally, Pearson correlation analysis and stepwise regression analysis were carried out to develop pedestrian LOS model for the overall unsignalized midblock crossings of road segments. The results revealed that the factors significantly influencing pedestrian LOS of the overall unsignalized midblock crossings of road segments included volume of two-way motor vehicle, the distance between marked midblock crosswalks, and the distance between unmarked crosswalks. A reliable, statistically calibrated pedestrian LOS model was developed (R2 = 0.80).

Modeling the Reductions in Carbon Emissions Resulting from Public Bicycles

There is mounting concern about low-carbon travel in order to reduce traffic congestion, improve environmental quality and save energy. Meanwhile, the public bicycle has been promoted worldwide as an energy-efficient and non-polluting travel mode. Based on the determination of carbon emissions factors, this paper studied the carbon emissions of different traffic modes and different traffic conditions, and established the carbon emissions reduction model of public bicycles. Taking Beijing as an example, on the basis of thorough investigation and research, this study calculated the carbon emissions reduction of Beijing public bicycles in July 2013. The purpose of this paper was to quantify the public bicycles contribution to the environment and demonstrate whether the public bicycle, as the low-carbon travel mode promoted by the government, was a more cost efficient solution.

Evaluation of Feeder Bus in Residential Area

With continued growth in the demand for urban transportation, developing public transportation has become a major means to improving the traffic environment. In order to attract more residents to public transport, the introduction of feeder bus between large residential areas and the subway may improve the overall level of service. This paper considers the special function and role of the feeder bus to the conventional ones (the “evaluation index”), and analyzes two levels of bus routes and bus stops. At the same time, we introduce two new concepts which are “degree of site deviation” and “residents’ detour factor”. Finally, we established an evaluation system that combines with AHP for the feeder bus. The research put forth in this paper provides a scientific basis for optimizing feeder bus routes and sites.