TRB State of the Art Report 9: Utilities and Roadside Safety includes the latest information on utility company, state department of transportation (DOT), and local highway agency roadside safety programs; describes the current status of a combined federal and industry effort to implement roadside safety, including yielding poles; and documents recent developments in guardrail, concrete barrier...

TRB State of the Art Report 8: Guide to Earthwork Construction provides construction engineers and technicians with information on all aspects of earthwork construction. Although it is not intended to be a design manual, it does contain considerable background on the design concepts that are necessary for good earthwork construction. The Guide is divided into ten chapters as follows: * Introduc...

It is generally known that the behavior of asphalt paving mixtures under conditions of induced stress is affected by the response of the asphalt cement in the mix. During the service life of the pavement, asphalt is exposed to low temperatures, which tend to alter its rheological response. It is important to study the low-temperature rheology of asphalts to gain a better understanding of the c...

This report is a collection of seven resource papers prepared for the Transportation Research Board's Committee for the Study of Geometric Design Standards for Highway Improvements, whose overall findings were published in Special Report 214: Designing Safer Roads - Practices for Resurfacing, Restoration, and Rehabilitation. Several experienced researchers were asked to review current knowledg...

TRB State of the Art Report 5: Lime Stabilization analyzes current practice in lime stabilization and suggests additional informational resources on the issue. For many years, various forms of lime, including products with varying degrees of purity, have been utilized successfully as soil stablizing agents. However, hydrated high calcium lime Ca(OH)2, monohydrated dolomitic lime Ca(OH)2.MgO, ca...

The purpose of this conference was to focus attention on the most costly element of intermodal service, the terminal. In spite of all the recent activity in terminal construction, expansion and rehabilitation, the challenge left is in the development of even more efficient, high-productivity intermodal systems that generate a lower net unit cost per container or trailer. The topics covered are...

TRB State of the Art Report 3: Recent Advances in Hazardous Materials Transportation Research: An International Exchange is the proceedings from a 3-day international conference for the exchange of ideas and information about the state of the art in research and technology applications to improve safety in hazardous materials transportation was held in Lake Buena Vista, Florida, on November 10-...

Effective use of capital in the design of light rail rights-of-way, track, stations, signal systems, vehicles, and maintenance facilities is a pressing need; wider understanding of this need is vital if light rail is to be seriously considered as a mass transit mode. The anticipated decreased availability of federal capital funds underscores the need to achieve greater results with state and l...

It is generally recognized that discontinuities in roadway surfaces can cause problems with vehicle steering, braking, maneuvering, and response that lead to loss of control. Such discontinuities can play a significant role in the occurrence of traffic accidents and they should be considered when assessing maintenance policy, evaluating improvements. Discontinuities include deviations from the...