نتایج جستجو برای: automated highway
تعداد نتایج: 140038 فیلتر نتایج به سال:
The Federal Highway Administration (FHWA) Office of Highway Planning requires states to furnish vehicle classification data as part of the Highway Performance Monitoring Systems (HPMS). To comply with this requirement, most states use the “F-Scheme” to classify vehicles. This scheme classifies vehicles in 13 classes depending on a number of factors, primarily the number of axles and the axle sp...
Manual surveying methods have long been used in the field of highway engineering to determine the cross-slope, and longitudinal grade of an existing roadway. However, these methods are slow, tedious and labor intensive. Moreover, manual survey methods almost always require partial or full lane closure resulting in traffic delays, increase in costs, and inconvenience to the travelling public. In...
We present a novel method for obstacle detection for automated highway environments. Laser range scanners have frequently been used for obstacle detection for mobile robots. Although most laser scanners provide intensity information in addition to range, laser intensity has been ignored by most researchers. We show that laser intensity, on its own, is sufficient (and better) for detecting obsta...
We address the following question how do we know a proposed design for an Automated Vehicle Highway System AVHS is safe In particular can we prove that there can be no high relative velocity collision on the AVHS We show that if the controllers in the vehicles satisfy a set of constraints then the AVHS is safe The problem of checking whether the controllers satisfy the constraints is equivalent...
I tems integration of many emerging technologies to effectively address the needs, both present and future, of the nation’s roadway complex. Here, an introduction to and brief history of IVHS is presented. Then, a more detailed overview of Automated Highway Systems (AHS), the part of IVHS of most interest to control engineers, is given. One focus is on various control issues that must be confro...
The Vehicular ad hoc network (VANET) is an emerging new technology. Developing multi-hop routing protocols for urban VANETs is a challenging task. VANET is one of the influencing areas for the improvement of Intelligent Transportation System (ITS) in order to provide safety and comfort to the road users. Besides safety applications VANET also provide comfort applications to the road users. Auto...
We investigate the use of large-scale Automated Highway Systems, also called one-dimensional vehicle platoons, as a practical traffic mitigation solution. We review recent theoretical results related to vehicle platooning and discuss their implications on the scalability and safety of large-scale platoons. We also quantify the performance of different platoon control strategies through simulati...
This paper presents a multibaseline stereo technique specially suited to detecting obstacles. First, we describe traditional multibaseline stereo and explain why it is not suitable for obstacle detection. This analysis leads directly to a suitable method. Then we describe the obstacle detection system that we have built. Finally, we show results from our system for a variety of different obstac...
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