The traffic speed deflectometer (TSD) is a device used to evaluate the pavement’s structural condition. Measurements obtained from the TSD are affected by noise, which can make it hard to interpret test results. The main ...

Mostly, design methods in transportation engineering do not address the level of risk associated with the design and use of various highway elements. Passing sight distance (PSD) is an example of a highway operational ...

This paper provides a discussion on network reliability, which is a subset of resilience. Past research shows how better understanding reliability and identifying ways to improve it can help a system’s response to a disaster, ...

For a given transportation network, evacuation route planning identifies routes and route schedules to minimize the time to evacuate the vulnerable population due to an imminent disaster. In this paper, we present a ...

The average delay experienced by vehicles at a signalized intersection defines the level of service (LOS) at which the intersection operates. A major challenge in this regard is the ability to accurately estimate all the ...

To improve congested freeways without adding lanes, many agencies are studying managed lanes, including high-occupancy toll (HOT) lanes or congestion-priced lanes. Although some elements of managed lanes have been researched ...

This paper describes a method for using location data to optimize the routing of pavement data collection vehicles. In much of the developed world, pavement testing is performed on a regular basis; the pavement testing ...

Federal laws require regular condition reporting for portions of the national highway system. Most agencies use instrumented vehicles to collect data on and report the required information. The routing of these vehicles, ...

Crashes at no-passing zones constitute a sizable percentage of the total crashes on two-lane rural roads. A no-passing zone site at a crest vertical curve on route 114 of Southwest Virginia has experienced several traffic ...