While rural freeways generally have lower crash rates, interactions between driver behavior, traffic and geometric characteristics, and adverse weather conditions may increase the crash risk along some freeway sections. This paper examines the safety effects of roadway geometrics on crash occurrence along a freeway section that features mountainous terrain and adverse weather. Starting from pre...

Purpose On-ramp merging areas are typical bottlenecks in the freeway network since on-ramp vehicles may cause intensive disturbances on mainline traffic flow and lead to various negative impacts efficiency safety. The connected autonomous (CAVs), with their capabilities of real-time communication precise motion control, hold a great potential facilitate ramp operation through enhanced coordinat...

This work implements and analyses a highway traffic flow simulation based on continuum modeling of traffic dynamics. A traffic-flow simulation was developed and mapped onto a parallel computer architecture. Two algorithms (the 1-step and 2-step algorithms) to solve the simulation equations were developed and implemented. They were then tested on a Cray T3E, a 3-D torroidal mesh with very fast i...

Abstract An appropriate road network imposes on planners take into account factors such as land use, slope, soil type, hydrology, and agricultural area. Due to various considerations desires, the planning process is difficult hence there may be confusion in interest decision-making process. The use of a geographic information system (GIS) Multi-Criteria Decision Analysis (MCDA) assist achieving...

Many transportation agencies take part in the freeway incident management (IM) process by deploying safety service patrols (SSPs), typically on highly congested, urban roadways. SSPs are a countermeasure to freeway operations problems, and their implementation can improve safety and mitigate congestion. They are typically deployed in areas that have high traffic volumes (e.g., urban freeways) a...

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INFORMATION HAS BECOME A CRITICAL part of successful economic develop ment for individuals, businesses, and communities. Lack of access to information was at least partially responsible for rural America's inability to keep up with urban increases in population, high-wage occupations, income, and education levels during the 1980s. Among rural areas, growth in farmingdependent counties and persi...