Safety on highways is one of the most important subjects in Transportation Engineering. The increasing rate of vehicles and the needs to design or geometrically modify the highways has been emphasized in the safe-design of roadways more than before. Between the constructive components of the highway, due to the increasing occurrences of accidents the horizontal curves are of great importance. T...

today’s, a common problem in cities is increasing delay and reducing the speed of traffic. on the other wise increasing costs of acquisition in urban area are not allow new routes and highways. also construction of new highway or street such as imam ali highway and sadr highway in tehran lead to develop new applications (such as brt lane ,…) and become quickly saturate and less efficient. there...

IN T R O D U C T IO N It is generally agreed that a wet pavement surface presents less resistance to skidding than does the same surface in a dry condition. It is also well known that ice and snow are very slippery; but on the other hand, they are special conditions which do not reflect any skid characteristic of the pavement surface. It is, therefore, the wet surface condition that is critical...

THIS report presents a graphic expression of the accident-volume relation at divided highway intersections. The expression was produced by averaging the past accident experience at 150 intersections. A total of 1, 811 accidents was tabulated in developing the chart. Uses of the chart include: (1) estimating the probable number of accidents which wil l occur in a future period and (2) correcting...

In this paper, we consider the problem of modeling and predicting highway accidents in the presence of randomly changing winter driving conditions. Unlike most accident prediction models in the literature, which are typically formulated in a static (e.g. regression models) or discrete time (e.g. time-series models) setting, we propose a continuoustime stochastic model to describe the relation b...

A Ithough the number of traffic accidents each year has been substantially reduced over the past decade, highway crashes continue to be a serious problem in the United States. In 1983 approximately 42,400 persons died in highway crashes, and 2 million suffered nonfatal injuries. The 217. reduction in annual highway fatalities and the 367. reduction in the highway fatality rate (fatalities/lOO m...

Railroad-related accidents are more dangerous than other transportation accidents in terms of severity and death rate etc. Therefore more efforts are necessary for improving safety. In the mean time, Korean national railroad has researched and invested continuously such as intelligent safety equipments and level crossing between railroad and highway for decreasing railroad-related accident and ...

The very high cost of highway accidents paid by societies around the world makes the highway safety improvement an important objective of transportation engineering. The high speed cars are gaining popularity as one of the important means of transportation among the middle and higher income group of the society in India. At the same time the road accident statistics with regard to these high sp...

The motor vehicle-train accident, though infrequent, is the most severe in terms of fatalities, personal injuries, and property damage per accident of all types experienced on American highways. This type of accident, however, can be eliminated only by closing all crossings to highway traffic or by constructing grade separations for all rail-highway crossings. The delay and congestion resulting...

This paper demonstrates the requirement of smart tolling systems for smart highway. In smart highway operators and drivers would be able to see in real time the information of traffic. The smart highway is next generation road aimed at Congestion Free, Stop Free and Accident Free through traffic information services. This study defines requirements and functions for development of smart tolling...