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When compared with most other common methods of travel, travel in general aviation aircraft is relatively unsafe. Fortunately, the most frequent causes of fatal general aviation (GA) mishaps could be significantly reduced with very simple autopilot systems. However, such systems can be prohibitively costly due in large part to the expense of validation and verification required to certify them. The...
The National Aeronautics and Space Administration (NASA) Airborne Subscale Transport Aircraft Research (AirSTAR) Unmanned Aerial System (UAS) is a facility developed to study the flight dynamics of vehicles in emergency conditions, in support of aviation safety research. The system was upgraded to have its operational range significantly expanded, going beyond the line of sight of a ground-based pilot...
Advanced surface surveillance capabilities have been shown to dramatically improve surface safety and aid in situation awareness, but these capabilities cannot be economically justified for small and medium airports. The MITRE Corporation has developed a concept for Low Cost Surface Awareness, built upon the use of commercial-off-the-shelf infrared cameras, computer vision processing, and georeferencing...
The diversity of applications' types in Vehicular Ad hoc NETworks (VANETs) has spawned a large variety of messages that need to be efficiently disseminated between connected vehicles. The most critical messages are those dedicated for safety applications such as road hazardous warning, signal violation warning, etc. The dissemination of this sort of messages is considered as a challenging task in...
A practical method for the design of an in-vehicle wireless sensor network operating in a truck is presented. The network has been dimensioned using promising candidate sensor applications that were chosen based on a set of key criteria including safety, security, and timing-criticality and commercial viability. An extensive set of experiments were carried out to determine characteristics, feasibility...
In this paper, the results of a combined numerical-experimental analysis on a system, part of a wireless sensor network, composed by a resonant electromagnetic energy harvester, a suitable power electronic interface and a sensor node are presented and discussed. Such a system is to be used onboard for real-time diagnostics and monitoring in railway vehicles for goods transportation.
A rich portfolio of services (e.g., road traffic information, maps download, Internet/cloud access) will be delivered to users on wheels through Vehicular Ad Hoc Networks (VANETs).Most of them will be offered by road-side units (RSUs) sparsely deployed along the roads. The prompt access to such services by passing by vehicles highly relies on the efficiency of service announcement procedures performed...
The increasing demand of diverse vehicular network oriented applications (both safety and non-safety related services would undoubtedly lead to shortage of spectral resource challenge for V2V communication networks. In order to resolve this issue, a novel Adaptive CR Enabled Vehicular NETwork (ACREVNET) framework is proposed in this paper. To avoid heavy overhead usually incurred during spectrum sensing,...
We implement a collision prevention system, called pSafety, which instantaneously informs pedestrians and drivers of the potential threatening accidents. Unlike other systems, pSafety alerts pedestrians of threatening vehicles coming from not only the line-of-sight, but also non-line-of-sight due to obstructions of the wall corner or other vehicles. pSafety collects GPS information from smartphones...
Basic safety message(BSM) or heartbeat message is periodically broadcast by each vehicle on the road, conveying vehicle's instantaneous position and driving state. The vehicular communication network enables the fast exchange of BSMs with neighboring vehicles which assists drivers in acquiring the local driving environment and maneuvering promptly in case of any potential hazard. Such message is exceptionally...
Visible Light Communication (VLC) has many advantages including high bandwidth and low cost, which is widely accepted as one of the most promising technologies for future Intelligent Transport System (ITS). This paper presents a VLC based vehicle collision avoiding system focusing on most common seen rear-end collision scenario. Both theoretical analysis and numerical calculation are implemented to...
To provide a basis to quantitate the navigational risk and evaluate the traffic safety for maritime safety administration to control the traffic as soon as possible to assure the traffic safety, this paper referred to the study on conflict delay time of road traffic and the application of traffic conflict technique used in waterway traffic, we try to analyze the influencing factors of navigational...
The moving-block system under ERTMS Level 3 represents a continuous detection of train positions, and continuous infrastructure-to-train communication. This allows trains to follow one another in smaller space and time headways than possible in fixed-block systems. Trains form platoons with undisturbed headways and uniform speeds in moving-block systems, with improved safety and increased capacity...
According to the 2013 annual report file by the Fatality Analysis Reporting System (FARS), 14 percent of all traffic fatalities and an estimated 3 percent of those injured in traffic crashes were pedestrians. Our approach is active safety system based on pedestrian detection. This paper proposes a traffic caution system for pedestrian safety whose objective is to give a warning using visual effect...
With the increase of vehicles ownership in the society, traffic security problem stands out. This paper proposes a warning strategy of vehicles' driving safety based on the vehicles networking. Receive the motion information sent from the adjacent vehicles through network and determine the position of the adjacent vehicles relative to the local vehicle when they have a higher speed. The people can...
This paper was primary a research of the seat belt protection of train driver during secondary impact of rail crash. The driver injury mainly came from the impact with interior structure of train cab. The finite element model of console, seat belt and driver's seat were detail built to simulate the crash interface of driver and Hybrid III dummy was applied to simulate the train driver. Compared with...
Aimed at the problem that it is easy for buses to roll in the extreme-turn conditions, the paper finished a series of analysis. First, bus turning driving dynamics model was established based on the effect of suspension motion on roll angle. In the extreme-turn conditions Roll stability and critical roll angle threshold were analyzed, and formulas of roll angle prediction and roll angle threshold...
We develop a robust, unsupervised vehicle tracking system for videos of very congested road intersections in urban environments. Raw tracklets from the standard Kanade-Lucas-Tomasi tracking algorithm are treated as sample points and grouped to form different vehicle candidates. Each tracklet is described by multiple features including position, velocity, and a foreground score derived from robust...
Cardiovascular disease (CVD) is a considerable risk factor of driving. The pain of cardiac events distracts driver's concentration, and ischemia brought by the CVD induces incapacity of driving. In this study, a prototype of the automated safety vehicle stop system has been developed. The system collects bio-signals through the steer-sensor and recognizes the driver's posture by a camera, and detects...
Decision making for lane change manoeuvre is of practical importance to guarantee a smooth, efficient and safe operation for autonomous driving. It is, however, challenging. On one hand, the behaviours of ego vehicle and adjacent vehicles are dependent and interactive. On the other hand, the decision should strictly guarantee safety during the whole process of lane change with uncertain and incomplete...
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