Hangfei Lin

• Tongji University

This study proposes a novel Bayesian hierarchical approach for online bus speed prediction by explicitly accounting for the spatiotemporal interaction (STI) of speed observations. The use of Laplace approximation can expedite the estimation of Bayesian models and enable the implementation of online prediction. Large numbers of trials are carried ou...

Shared dockless scooters are expanding across the world rapidly, serving as a strong alternative to the bikesharing system. Limited studies shed light on the usage characteristics of this emerging service, and relatively little is known about its similarities and differences with bikesharing. This study compares the key factors related to bikeshari...

Carsharing systems deploying electric vehicles (EVs) have grown significantly over recent years. This study aims to employ data-driven approaches to understand users' decision-making in terms of usage frequencies and vehicle preferences. Massive data of over five million transactions from EVCARD-the biggest EV sharing company in Shanghai is collect...

Carsharing systems deploying electric vehicles (EVs) have grown significantly over recent years. This study aims to employ data-driven approaches to understand users' decision-making in terms of usage frequencies and vehicle preferences. Massive data of over five million transactions from EVCARD-the biggest EV sharing company in Shanghai is collect...

Bus speed indicates the performance of bus systems. Exploring the impact of contributing factors to bus speed can provide public transit agencies insights into developing improvement strategies. Bus speed observations can be correlated both spatially and temporally, but their dependence has generally been neglected. This paper proposes a novel mult...

Annual average daily traffic (AADT) is an important measurement used in traffic engineering. Local streets are major components of a road network. However, automatic traffic recorders (ATRs) used to collect AADT are often limited to arterial roads, and such information is, therefore, often unavailable for local streets. Estimating AADT on local str...

Carsharing has grown significantly over recent years. Understanding factors related to the usage and turnover rate of shared cars will help promote the growth of carsharing programs. This study sets station-based shared car booking requests and turnover rates as learning objectives, by which generalized additive mixed models are employed to examine...

Urban road waterlogging occurs frequently during heavy rainstorms. Effectively identifying urban road waterlogging can help people plan their travel reasonably and thus reduce losses. By comparing the precipitation and floating car data in the waterlogging state with those in the normal state, an automaic road waterlogging detection algorithm using...

In this paper, pedestrian crossing behavior characteristics at signalized countdown intersections are studied and the countdown influence on pedestrian crossing is quantitatively analyzed. The crossing process is divided into four stages; this study focuses on the latter two stages. Through survey data, the behavior characteristics at different typ...

In this paper, based on intersections’ volume data of peak hours in one weekday in Shanghai, intersection turning movement proportion is calculated using an algorithm. Combined with realistic distances between intersections, analysis is performed reckoning driving distance on different road sections to reflect road function. Data indicates that the...

This paper are trying to investigate the existence and the characteristics of macroscopic fundamental diagram (MFD) for urban expressway network in different types of days based on detectors data in Shanghai, China. At first, the features of the urban expressway is discussed relating the speed and occupancy, and then the existence of MFD in Shangha...

With the rapid increase of economy and residents’ income in China, the era of civil aviation massification is coming at present. As the sharp increase of traffic in airside, the shortage of transport capability in airport landside is exposed. Congestion often occurs in landside road systems and parking facilities of Chinese large airports.

A novel method aiming at analyzing the effect of dedicated bus lanes (DBLs) in improving bus operation performance based on secondary speed difference concept was proposed. With global positioning system (GPS) data of buses and cabs, stop data and road segment data from 54 roads in Shenzhen City, we analyzed the speed characteristics of DBLs on maj...

Statistics and forecasting of road traffic conditions is a key element for transportation planning. Because of the accuracy limitations of FCD (floating car devices, such as BEIDOU or GPS devices installed on a vehicle), it is very difficult to do map matching and route deriving for elevated and ground road networks when using FCD data. Because of...

Dedicated Bus lanes (DBLs) are widely used in China as a method of bus priority guarantee, but its effect on improving bus operation speed is controversial. Using Global Positioning System (GPS) data and bus stop data of buses and cabs driven on 54 roads in Shenzhen City, this study first obtains vehicle speed, bus stop density, and other informati...

The land use pattern of the areas along urban rail transit is crucial for the efficiency of transportation system and city sustainable development. This paper analyzes the characteristics of land use along urban rail transit in Shanghai, China from three levels: rail network, lines, and stations by taking advantage of the POI data collected from op...

Bus bay stops at signal-controlled intersections may cause greater delays compared to on-line bus stops. By using a traffic flow model and wave theory, this study established the delay model to estimate the bus delay in bus bay stops at a non-saturated signalized intersection to provide the mathematical expressions of bus delays. The results show t...

The aim of this work is to investigate the delay of buses caused by the combined effect of bus bays and signal-controlled intersection. First, this paper built the delay model of buses at bus bays without bus-lane upstream the intersection. Second, it checked the validity of the proposed model by simulation results. The results show that dwell time...

With reference to Hangzhou's intelligent transport information platform design, this paper presents the central aim, system function and implementation technique of city's intelligent transport information platform construction, which is one of the major tasks of constructing China's metropolitan ITS (Intelligent Information System). First of all,...

Gaining a better understanding of commuting characteristics in rural areas could provide urban planners and policy makers with a new insight into urban development and planning. In many cities, travellers move from urban areas to live in rural areas due to fast urbanization. Therefore, an empirical study was conducted in Jinhexincheng community tha...

Evaluating design consistency is of great significance for safety evaluation on roadway design prior to its construction. Conventional design consistency showed little consideration of driving performance due to the limitation in data availability. More importantly, they were performed only on the existing roads. In this study, a simulated driving...

Le poster présente le full-scale simulateur construit par Oktal pour l'Université de Tongji à Shanghai, ainsi que les études de validation réalisées en collaboration avec l'Ifsttar.

Container shipping is a major part of freight transportation in urban areas. Due to the different logistics modes, same port container throughput may lead to large differences in not only traffic volume within the city road network but the impact of urban transportation. This paper will classify the transportation mode from goods sourcing destinati...

More than 3000 taxis are used as the source to collect Floating Car Data (FCD). Ten samples with different sample sizes are taken at random from all the taxis. Average travel speeds of probe cars in an urban road network are calculated through these 10 samples. A nonparametric test is used to analyze the differences among the results calculated thr...

Non-motorized modes such as cycling and walking were the main mode of Chinese residents. With the rapid development of China's economy and an increase in its motor vehicles, residents' trip modes may have changed. This paper uses trip survey data from Changsha to analyze the spatial distribution of non-motorized traffic; the distribution of trip pu...

As the rapid development of urbanization in China, the travel demand between the city and its surrounding areas has also increased rapidly. In order to achieve the equalization of public service, many actives have been taken by the government in many Chinese cities, especially the construction of the integrated urban and rural public transport. Acc...

Floating car data is usually used in inner-city roads, but is less used in inter-city highways in China. This paper focuses on FCD processing models for inter-city highways based on road network analysis and processing models for toll stations, service areas and long-distance tunnels. The paper also addresses the accuracy verification methods for r...

Based on taxi GPS data, a method of calculating intersection approach queue length and delay is put forward. In this paper, each approach is divided into several sub-segments by every 20 meters. A new method of traffic condition analysis is established, taking sub-segment speed as threshold, the starting point of queue and the queue length are gain...

This paper analyzes the development of the highway in the world's 25 most developed countries and makes a statistical analysis, while finding that the development of the highway in developed countries has experienced two stages: the first one is economic-driven and the second is population-driven. The paper points out that in the first stage, the c...

Floating Car Data has been used to evaluate traffic conditions in Real-time Transportation Information Systems. In these systems, taxis are often used as probe cars. Because of the randomicity of taxis when travelling in cities, it is necessary to analyze taxis’ distribution characteristics in road networks. In this paper, two indexes named Detecti...

According to the analysis of urban centre traffic characteristic, this article utilizes the second-level fuzzy synthetic evaluation method based on the analytic hierarchy process (AHP), manages to evaluate the urban centre's transportation organization effect. This article uses this evaluation method integrates the dual merits, take the fuzzy theor...

Due to the geological and environmental conditions, the traffic organization of riverside road has unmatched features. Focusing on the various functions of riverside roads, such as sightseeing, leisure, and the traffic, the paper summarizes the features of riverside roads. By analyzing the riverside road functions, five weighted factors are introdu...

Due to interruptions caused by traffic signal control devices in urban signalized network, link travel time of different vehicle fluctuate stochastically. This paper presents a promising method applying link aggregating algorithm (LAA) to reduce the fluctuation of link travel time estimation. The method is proved though developing a simple model si...

While it is generally agreed that operational conditions have an effect on traffic safety, their relationship has not been well defined at a level of detail that adequately supports operation and planning performance measurements. Signalized intersections are the most complex locations on the roadway network, and they are vital to the efficiency an...

To overcome the shortcomings in existing control mechanisms and adapt to domestic transit operation conditions such as high frequency and overlapped bus routes, many researchers work on various optimization methods. In fact, the effectiveness of priority control varies with side road traffic demand. If a side road is less congested, priority contro...

Taking delay as the main index of efficiency, the influence of different lane numbers was studied by simulation. The result shows that when freeways with two unidirectional lanes are rebuilt to three unidirectional lanes, not only the increase in traffic volume can be satisfied, but the influence of heavy vehicles can be diminished. When freeways w...

Transport systems of most Chinese cities are in a large-scale construction period. To make the decision of planning and construction more scientific and to make urban transport management finer is the chief task of Intelligent Transport System (ITS) construction in the big cities of China. "Shenzhen Urban Transport Simulation System" is based on a...

Based on the infrastructure condition and transport technology capacity of China, the primary objective of Intelligent Transport System (ITS) development of Chinese cities is to provide technical support and decision support of the transport planning process. The construction of planning a decision-oriented transport information platform is to real...

The proportion of heavy vehicle is very high in Chinese freeway. The presence of heavy vehicle affects the lane choice behavior of cars and some particular phenomena arose, among which is the "heavy vehicles and cars in different lane" phenomenon. Models are present in analyzing the occurring condition of this phenomenon. And the impacts on the ope...