Abstract

Public Bicycle-Sharing Systems (PBSS), also known as self-service public bicycle systems, are available in numerous big cities in the world (Velib' in Paris, Bicing in Barcelona, Call-aBicycle in Munich, OyBicycle in London, etc.). Since its inception, Bicycle-sharing programs have grown worldwide. There are now programs in Europe, North America, South America, Asia, and Australia. A still growing list of cities which provides such green public transportation mode can be found at the Bicycle-sharing world map (http://Bikesharing.blogspot.com) as shown in Figure 1. As a good complementary to other urban transportation modes, bicycle use entails a number of benefits including environmental, mobility and economic benefits. The public bicycle sharing systems are especially useful for short-distance city transport trips and to face many public transport problems, including growing traffic congestion, pollution, greater car dependency, buses caught in city congestion, and ageing transport infrastructure.

Abstract

In the discrete event and hybrid systems theory, Batches Petri Nets (BPN) have been defined as an extension of Hybrid Petri nets for representing in a single node a linear relation between flow and density. This formalism and its extensions allow us to delay flows according to accumulation phenomena. Applied to mesoscopic modeling of traffic road networks, Triangular Batches Petri Nets (TBPN) have been defined as a triangular flow-density relation, allowing the representation of traffic congestion/decongestion phenomena. When variable speed limit (VSL) control is applied on the traffic road networks, i.e., a method that improves the traffic conditions by the reduction of congestion, Controlled Triangular Batches Petri Nets (CTBPN) can be used for analyzing such phenomena. In this paper, we present the hybrid formalism defined in CTBPN, i.e., the hybrid behavior of a batch in free, congestion or decongestion behavior. As an illustrative example, the congestion/decongestion phenomena on a road section and the impact of a VSL control are shown.

Abstract

International audience; Bicycle sharing system has become more and more popular as it can help partly solve the problems such as CO2 over-emission and traffic congestion. Some systems have been operated for several years and the analysis work is very necessary for controlling and redesigning the system in purpose of getting better performances. In this paper we analyze the bike-sharing stations by clustering algorithms in order to mine the inner-station patterns, and these clustering results are essential for the system control and redesign. In this study, we take Vélib' bike sharing system in Paris as the study case.