In the context of intelligent transportation, this paper presents a novel on-line trajectorygeneration method for autonomous lane changing. The proposed scheme is guidance based, realtime applicable, and ensures safety and passenger ride comfort. Based on the principles of Rendezvous Guidance, the passing vehicle is guided in real-time to match the position and velocity of a shadow target (i.e....

Highway Hierarchies. The computation of shortest paths in a graph is a well-known problem in graph theory. One of the most obvious practical applications is route planning in a road network, i.e., finding an optimal route from a start location to a target location. It is often assumed that a given road network does not change very often and that there are many source-target queries on the same ...

Wayfinding in road networks is a hierarchical process. It involves a sequence of tasks, starting with route planning, continuing with the extraction of wayfinding instructions, and leading to the actual driving. From one task level to the next, the relevant road network becomes more detailed. How does the wayfinding process change? Building on a previous, informal hierarchical highway navigatio...

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...

Wayfinding in road networks is a hierarchical process. It involves a sequence of tasks, starting with route planning, continuing with the extraction of wayfinding instructions, and leading to the actual driving. From one task level to the next, the relevant road network becomes more detailed. How does the wayfinding process change? Building on a previous, informal hierarchical highway navigatio...

Wayfinding is part of everyday life. This study concentrates on the development of a conceptual model of human navigation in the U.S. Interstate Highway Network. It proposes three different levels of conceptual understanding that constitute the cognitive map: the Planning Level, the Instructional Level, and the Driver Level. This paper formally defines these three levels and examines the concep...

Growing public awareness of climate change requires transportation professionals to integrate green concepts into the transportation planning, design, construction, and operation processes. For the past decade, while many studies have been done regarding carbon emission reduction strategies for on-road and off-road operations, very few have dealt with emission reduction issues in highway projec...

Increased emphasis has been placed on improving the explicit role of highway safety in making decisions on highway planning, design, and operations. This can be achieved by quantifying the safety effects of geometric design elements for various highway facilities. While great attention has been directed primarily on rural two-lane highways and to a lesser degree, on urban arterials and rural mu...

The Egnatia highway, a modern closed motorway 670 kilometres long, is one of the largest road construction projects in Europe, running across Northern Greece. In order to record and analyze the spatial and environmental effects that inevitably the Egnatia highway has caused to its surroundings, the need for effective and efficient integration of land cover dynamic information is becoming more a...

Urban joblessness and inner city deprivation are a feature of the late twentieth century throughout the developed world. This paper considers the effectiveness of spatiallytargeted programmes in creating employment in deprived urban areas. It begins by discussing the twin themes of “enterprise” and “localism” which have dominated the UK policy response to urban problems in the 1990s and goes on...