ITE JOURNAL / NOVEMBER 1999 HIGHWAY-RAILROAD GRADE crossings are a relatively unique and sometimes perilous intersection of two transportation modes. The cost of collisions at these intersections is high in both dollars and human lives. The amount and type of sight distance provided at highway-railroad grade crossings can have significant impacts on safety. The proper calculation of these sight...

Population growth and the massive production of automotive vehicles have lead to the increase of traffic congestion problems. Traffic congestion today is not limited to large metropolitan areas, but is observed even in medium-sized cities and highways. Traffic engineering can contribute to lessen these problems. One possibility, explored in this paper, is to assign tolls to streets and roads, w...

In this paper we present a video-based real-time system for detection and recognition of moving objects in transportation related scenes. Our goal is to build an intelligent video understanding system which functions without object models that need a huge number of training samples. This system should have a very high recognition rate and comply with real-time constraints. To achieve this goal,...

IN T R O D U C T IO N The question of whether the use of metal studs in automobile tires should be permitted as an aid to winter driving has been a highly controversial issue in Minnesota for a number of years. The state leg­ islature in biennial sessions had legalized their use on Minnesota roads and streets for six successive winters from October 1965 through May 1971. But during its last ses...

W ith the advent of the automobile as a mode of transportation late in the nineteenth century, a new phenomenon, the motor vehicle acci­ dent, appeared on the American scene. While the motor vehicle was in its early stages of development, the problem was not serious. How­ ever, as the volume of cars on the highways increased, the number of accidents increased also; the problem began to assume g...

Accurate, detailed and up-to-date road information is of special importance in geo-spatial databases as it is used in a variety of applications such as vehicle navigation, traffic management and advanced driver assistance systems (ADAS). The commercial road maps utilized for road navigation or the geographical information system (GIS) today are based on linear road centrelines represented in ve...

In this paper we address the issue of expressing and using contextual factors in information seeking tasks. Following our perception of context for the IR domain, we discuss the contextual support provided in TM4L an environment for building and using topic-centered learning repositories. We propose an extension of the Topic Maps model with contexts and an approach for contextual retrieval that...

The ISO standard ISO/IEC 13250 Topic Maps offers a flexible and powerful technique for knowledge representation. The standard defines the general concepts and provides – with intention – just the necessary minimum of semantic. But knowledge representation requires more semantic – earlier publications identified “templates”, “type hierarchies”, “association properties”, “inferences”, and “constr...