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The conceptual basis for automated highway systems (AHS) was established 70 years ago, long before it was technologically feasible. The historical context of thinking about AHS since then is reviewed, followed by a focus on the development of PATHpsilas research program on AHS during the past 20 years. The primary contributions to knowledge from the PATH AHS research are summarized, followed by identification...
An innovative motorist-initiated incident detection method using wireless positioning technology, such as global positioning system (GPS) and cellular phone positioning system (CPS) is developed. Then, the basic detection algorithm is presented. The position information and operating characteristics of reporting vehicles are detected using wireless positioning system and is transferred by global system...
Starting with analyzing the significance of the express freight information platform, this paper proposes a structural model of the express freight system. Also, an express freight information platform model based on RFID and Web technology is built, and the modelpsilas operation flow, data flow, a standard technical solution toward the efficient communication among different userpsilas information...
Traffic conflict studies have been accepted because the data and the effectiveness of a treatment of safety problems can be collected and evaluated in a short period of time. Driving behavior is the reflection of the vehicles operating characteristic, and it has close relation with traffic safety. In the paper, the process of vehicle coming and going at intersection, and driving behavior when conflict...
A new quantitative measure for transportation network efficiency is proposed in this paper. The measure can be used to assess the performance of a transportation network, because it can reflect the influence on the network efficiency induced by flows, travel cost and travel behavior under the equilibrium of the transportation network. Numerical application denotes the method can measure the efficiency...
Istanbul, the biggest city in Turkey and the sixth most-populated city in the World, has been dealing with enormous traffic problems for over two decades. Studies and projects are continuously developed, but these efforts have either been temporary solutions or not been adequate in order to solve the problem because of numerous reasons such as unplanned expansion, increasing number of population,...
As the development of the rural and urban economy, the number of the motor vehicles has been skyrocketing. In the condition of increasingly enhancing locomotive speed nowadays, railway crossing security is becoming a bottleneck to restrict the railway transportation ability. This study introduces the basic modules which constitute the railway crossing surveillance and warning system, formulates the...
Logistic infrastructure (LI) is an important area of urban competition capability. The connotation of Logistics Infrastructure Capability (LIC) is analyzed in this paper. Compared with the extensive research on LIC in developed world, empirical work is still rare in developing world. In this paper the theory of LIC is firstly overviewed. Then a new evaluation index system for LIC evaluation is set...
Traffic congestion on major roadways costs our nation billions of dollars in lost earnings, wasted fuel consumption, injury and loss of human life. Providing motorists with real time roadway conditions is essential to mitigating traffic congestion. We propose a novel real-time messaging system that can be used to communicate imminent traffic conditions to motorists. Having such information can allow...
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