Rendezvous and docking/berthing are key manoeuvers for various missions [1]. In those rendezvous phases where the accuracy of absolute navigation (e.g. by satellite navigation services like GPS or GLONASS) is no longer sufficient, sensors have to provide information about the relative position of active vehicle (chaser) and passive vehicle (target). Satellite navigation (differential GPS), radi...

It is important to know the road traffic density real time especially in mega cities for signal control and effective traffic management. In recent years, video monitoring and surveillance systems have been widely used in traffic management. Hence, traffic density estimation and vehicle classification can be achieved using video monitoring systems. In most vehicle detection methods in the liter...

The existing vehicle-based sensors of taxi companies in most of cities can be used for traffic monitoring, however sensors are always set with a long sampling interval because of communication cost saving and network congestion avoidance. In this paper, we are interested in understanding what performance for traffic monitoring we might expect from such vehicle-based mobile sensor networks provi...

The objective of this study was to make a comparative evaluation of mainline and sub-urban rail vehicles in terms of ergonomic variables of Safety and Comfort. As an end result the objectives were also to make recommendations for the rail vehicle manufacturers industry for future vehicle design. The results of the evaluation allowed us to draw some conclusions and recommendations about future r...

Truck or heavy vehicle crashes feature regularly in print, online and television media. When a heavy vehicle is involved in a serious crash, particularly one involving loss of human life, this often triggers public debate about the road conditions at the location of the crash, the factors that may have contributed to the crash and how the government is addressing the issue. Recently, there have...

In this project, we propose to develop a tracking based traffic performance measurement system for roundabouts and intersections. There are two main goals for the project. One is to be able to collect all types of traffic performance measurements by tracking each individual vehicle and to improve performance measurement accuracy. The other goal is to focus on roundabouts and intersections as tr...

The efficiency of transportation requests fulfillment can be increased through extending the problem of vehicle routing and scheduling by the possibility of subcontracting a part of the requests to external carriers. This problem extension transforms the usual vehicle routing and scheduling problems to the more general integrated operational transportation problems. In this contribution, we ana...

OBJECTIVE The purpose of our study was to better characterize and evaluate drunk driving for governmental reference in order to further reduce alcohol-impaired driving. METHOD This article reports the characteristics of 1226 alcohol-positive drivers with blood alcohol concentrations (BACs) at or over the legal limit of 0.20 mg/mL involved in nonfatal traffic accidents in Shanghai, China, from...

In traffic safety literature, crash frequency variables are analyzed using univariate count models or multivariate count models. In this study, we propose an alternative approach to modeling multiple crash frequency dependent variables. Instead of modeling the frequency of crashes we propose to analyze the proportion of crashes by vehicle type. A flexible mixed multinomial logit fractional spli...