Observations and measurements were made at 140 low volume intersections in three regions of the United States. Control type, region, location (urban/rural), geometry (3-leg/4-leg), major roadway volume and sight distance are examined to determine the...

This volume presents evaluations of the traffic operational and safety effectiveness of 40 recent interchange rehabilitation projects. All of the projects involved geometric design modifications at freeway-arterial interchanges in urban and suburban ...

A rapid method for analysis of Portland cement is given using atomic absorption spectrophotometry (AA), in which either reagent standards or standard cements may be used for calibration purposes. A novel feature of the method is that means are provid...

The purpose of this report was to develop guidelines for the operational traffic engineer and the transportation researcher to determine when, where and how to use time-lapse photography. This technique permits the large scale sampling of specific ev...

A laboratory evaluation of the feasibility of utilizing sewage sludge in construction of a highway embankment was conducted. Mixtures composed of lime, fly ash, waste calcium sulfate and up to 17 percent sewage sludge were evaluated. The effect of li...

This research study involved the load testing and structural analysis of eight typical State Highway Department inlet grates; six roadway and two median grates. Other grate variables were: steel or cast iron. shape of grate members. and flat or slope...

The objective of this study is to assess horizontal drilling as an alternative to pilot tunneling in geological investigation prior to the design and construction of highway tunnels and to identify means to increase the penetration capability and acc...

A study of chemical stabilization of soils began in 1954 with a program enlisting the aid of chemical industry in the search for effective chemicals. Nineteen firms signed a letter of agreement, and others cooperated on an i nforma1 basis. Federal pa...

Recommends improved designs for further research. Emphasis is upon developing procedures to understand and control displacements adjacent to deep excavations. Concepts include both analytical procedures and construction techniques. Suggested methods ...

This report presents a simplified procedure for computing vehicle offtracking on curves. It was developed during a research effort to determine what the offtracking requirements were if the width of buses for operation on the Interstate Highway Syste...

Transportation Synthesis Reports are brief summaries of currently available information on topics of interest to WisDOT staff throughout the department. Online and print sources for TSRs include NCHRP and other TRB programs, AASHTO, the research and ...

This project consisted of the design and development of an automated oversize/overweight permit processing application to overcome current paper and labor-intensive processes within the Wisconsin Department of Transportation. The application links wi...

A package of six user-oriented computer programs has been developed and tested for the analysis and design of urban highway drainage systems and related non-point source pollution problems. These programs are organized into four related but independe...

The report describes the results of work conducted as a phase of a study concerned with the restoration of load transfer to existing jointed concrete pavements. Five projects were selected for study to determine the location of dowel bars placed by m...

Transit is seen by insurers as a risk with high loss potential. Since people are transported in large numbers, a single accident may yield many claims. One solution to this insurance situation that has been employed by transit system operators is to ...

The Volpe National Transportation Systems Center (Volpe) reviewed the Federal Motor Carrier Safety Regulations (FMCSRs) to identify compliance and enforcement challenges related to the operation of automated commercial vehicles (CMVs) in interstate c...

This report summarizes the results of the 2016 Federal Motor Carrier Safety Administration (FMCSA) Drug and Alcohol Testing Survey. This annual survey measures the percentage of commercial driver’s license (CDL) drivers who test positive for contro...

The study was conducted through a combination of analyses and tests with a double-decker motorcoach. State transportation safety and law enforcement officials were consulted, and the study plan was revised according to their comments. An exemplar mot...

As the Federal Government's chief commercial vehicle safety agency, the Federal Motor Carrier Safety Administration's (FMCSA), Office of Research and Technology (R&T) focuses on saving lives and reducing injuries by helping to prevent crashes involvi...