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Turner-Fairbank Highway Research Center

Overview
Works: 1,333 works in 2,237 publications in 1 language and 104,792 library holdings
Genres: Periodicals  History  Handbooks and manuals 
Classifications: TE23, 625
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Most widely held works about Turner-Fairbank Highway Research Center
 
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Most widely held works by Turner-Fairbank Highway Research Center
Covered bridges and the birth of American engineering( Book )

2 editions published in 2015 in English and held by 581 WorldCat member libraries worldwide

LTPP pavement maintenance materials : SPS-4 supplemental joint seal experiment, final report by Kelly L Smith( Book )

7 editions published in 1999 in English and held by 549 WorldCat member libraries worldwide

This report documents the entire Specific Pavement Studies (SPS)-4 supplemental joint seal study, including the installation of 29 unique joint seal treatments, the laboratory testing of experimental sealant materials, and the multi-year performance monitoring of the various joint seal treatments. It also discusses the results of comprehensive statistical analyses conducted on sealant material performance
Pedestrian and bicyclist intersection safety indices by Turner-Fairbank Highway Research Center( )

8 editions published between 2006 and 2007 in English and held by 452 WorldCat member libraries worldwide

Multiple corrosion protection systems for reinforced concrete bridge components( )

6 editions published in 2007 in English and held by 450 WorldCat member libraries worldwide

Eleven systems combining epoxy coated reinforcement with another corrosion protection system are evaluated using the rapid macrocell, Southern Exposure, cracked beam, and linear polarization resistance tests. The systems include bars that are pretreated with zinc chromate to improve the adhesion between the epoxy and the reinforcing steel; two epoxies with improved adhesion to the reinforcing steel; one inorganic corrosion inhibitor, calcium nitrite; two organic corrosion inhibitors; an epoxy coated bar with a primer containing microencapsulated calcium nitrite; the three epoxy coated bars with improved adhesion combined with the corrosion inhibitor calcium nitrite; and multiple coated bars with an initial 2 mil coating of 98 percent zinc and 2 percent aluminum followed by a conventional epoxy coating. The systems are compared with conventional uncoated reinforcement and conventional epoxy coated reinforcement. The results presented in this report represent the findings obtained during the first half of a 5 year study that includes longer term ASTM G 109 and field tests. In the short term tests used to date, the epoxy coatings evaluated provide superior corrosion protection to the reinforcing steel. The results also indicate that the bars will continue to perform well in the longer term, although the tests do not evaluate the effects of long term reductions in the bond between the epoxy and the reinforcing steel. The corrosion rate on the exposed regions of damaged epoxy coated reinforcement is somewhat higher than the average corrosion rate on the surface of uncoated reinforcement subjected to similar exposure conditions. The use of concrete with a reduced water cement ratio improves the corrosion performance of both conventional and epoxy coated reinforcement in uncracked concrete but has little effect in cracked concrete. Increased adhesion between the epoxy and reinforcing steel provides no significant improvement in the corrosion resistance of epoxy coated reinforcement. It appears that corrosion inhibitors in concrete and the primer coating containing microencapsulated calcium nitrite improve the corrosion resistance of the epoxy coated steel in uncracked concrete, but not in cracked concrete. The zinc coating on the multiple coated bars acts as a sacrificial barrier and provides some corrosion protection to the underlying steel in both uncracked and cracked concrete. The degree of protection, however, cannot be evaluated based on the results available to date
Multiple corrosion protection systems for reinforced concrete bridge components( )

4 editions published in 2011 in English and held by 446 WorldCat member libraries worldwide

Eleven systems containing epoxy-coated reinforcement (ECR) in combination with another corrosion-protection system are evaluated using the rapid macrocell, southern exposure, cracked beam, linear polarization resistance, and field tests. The systems include bars pretreated with zinc chromate to improve the adhesion between the epoxy and the reinforcing steel, two epoxies with improved adhesion to the reinforcing steel, one inorganic corrosion inhibitor (calcium nitrite), two organic corrosion inhibitors (Rheocrete 222+ and Hycrete), an epoxy-coated bar with a primer containing microencapsulated calcium nitrite, three epoxy-coated bars with improved adhesion combined with the corrosion inhibitor calcium nitrite, and multiple-coated (MC) bars with an initial 50-microm (2-mil) coating of 98 percent zinc and 2 percent aluminum followed by a conventional epoxy coating. The systems are compared with conventional uncoated reinforcement and conventional ECR. The coatings on all bars are penetrated to simulate the effects of damage during fabrication and placement in the field. The results presented in this report indicate that the coated bars provide superior corrosion protection to the reinforcing steel and that bars with damaged coatings initiate corrosion at chloride contents within concrete that are several times greater and corrode at rates that are typically two orders of magnitude below those exhibited by conventional reinforcement
Achieving a high level of smoothness in concrete pavements without sacrificing long-term performance by Rohan W Perera( )

4 editions published in 2005 in English and held by 430 WorldCat member libraries worldwide

Freeze-thaw resistance of concrete with marginal air content by Jussara Tanesi( )

4 editions published between 2006 and 2007 in English and held by 425 WorldCat member libraries worldwide

Freeze-thaw resistance is a key durability factor for concrete pavements. Recommendations for the air void system parameters are normally: 6 ± 1 percent total air, and spacing factor less than 0.20 millimeters. However, it was observed that some concretes that did not possess these commonly accepted thresholds presented good freeze-thaw resistance in laboratory studies. This study evaluated the freeze-thaw resistance of several "marginal" air void mixes, with two different types of air-entraining admixtures (AEA)-a Vinsol resin and a synthetic admixture. This study used rapid cycles of freezing and thawing in plain water, in the absence of deicing salts. For the specific materials and concrete mixture proportions used in this project, the marginal air mixes (concretes with fresh air contents of 3.5 percent or higher) presented an adequate freeze-thaw performance when Vinsol resin based air-entraining admixture was used. The synthetic admixture used in this study did not show the same good performance as the Vinsol resin admixture
Office of Safety R & D( )

3 editions published in 2008 in English and held by 411 WorldCat member libraries worldwide

Safety evaluation of offset improvements for left-turn lanes( )

5 editions published in 2009 in English and held by 409 WorldCat member libraries worldwide

"The Federal Highway Administration (FHWA) organized a pooled fund study of 26 States to evaluate low-cost safety strategies as part of its strategic highway safety effort. One of the strategies chosen to be evaluated for this study was offset improvements for left-turn lanes. This strategy is intended to reduce the frequency of crashes by providing better visibility for drivers that are turning left. The safety effectiveness of this strategy has not been thoroughly documented, and this study is an attempt to provide an evaluation through scientifically rigorous procedures"--Technical report documentation page
Safety effectiveness of the HAWK pedestrian crossing treatment by Kay Fitzpatrick( )

3 editions published in 2010 in English and held by 403 WorldCat member libraries worldwide

The High intensity Activated crossWalK (HAWK) is a pedestrianactivated beacon located on the roadside and on mast arms over major approaches to an intersection. It was created in Tucson, AZ, and at the time of this study, it was used at more than 60 locations throughout the city. The HAWK head consists of two red lenses over a single yellow lens. It displays a red indication to drivers when activated, which creates a gap for pedestrians to use to cross a major roadway. A before after study of the safety performance of the HAWK was conducted. The evaluations used an empirical Bayes (EB) method to compare the crash prediction for the after period if the treatment had not been applied to the observed crash frequency for the after period with the treatment installed. To develop the datasets used in this evaluation, crashes were counted if they occurred within the study period, typically 3 years before the HAWK installation and 3 years after the HAWK installation or up to the limit of the available crash data for the after period. Two crash datasets were created. The first dataset included intersecting street name (ISN) crashes, which were all crashes with the same intersecting street names that matched the intersections used in the study. The second dataset included intersection related (IR) crashes, which were only those ISN crashes that had yes for the intersection related code. The crash types that were examined included total, severe, and pedestrian crashes. From the evaluation that considered data for 21 HAWK sites (treatment sites) and 102 unsignalized intersections (reference group), the following changes in crashes were found after the HAWK was installed: a 29 percent reduction in total crashes (statistically significant), a 15 percent reduction in severe crashes (not statistically significant), and a 69 percent reduction in pedestrian crashes (statistically significant)
Traffic control device conspicuity by Vaughan W Inman( )

2 editions published in 2013 in English and held by 401 WorldCat member libraries worldwide

The conspicuity of a traffic control device (TCD) is defined as the probability that the device will be noticed. However, there is no agreed-upon measure of what constitutes being noticed. Various measures have been suggested, including eye fixations, recall, and verbal reports. Four conspicuity studies are discussed in this report. It has been observed that conspicuity is not solely a property of a TCD but must include consideration of the surrounding environment. The first of the studies described in this report used multidimensional scaling (MDS) to identify factors that characterize drivers' perceptions of TCD environments. The MDS study revealed that two dimensions, clutter and predictability, characterized the roadway environments included in the study. In the second study, drivers' eye glances to TCDs were recorded on a 34-mi (55-km) drive. After passing selected TCDs, drivers' recall of the TCD was assessed by asking them to identify it. That study showed that warning signs are seldom glanced at and only about half of them are recalled just 2 s after they are passed. About 20 percent of speed limit signs received glances, but drivers were aware of the posted speed limit about 80 percent of the time. The third study examined drivers' ability to detect speed limit and warning signs. The ability to detect speed limit signs, as measured by conspicuity angle, was degraded by cluttered backgrounds. However, the detectability of fluorescent yellow-green warning signs was not affected by background clutter. The fourth study examined the effect of background environment on drivers' ability to read TCDs. Background had no effect on speed limit sign readability and had a small effect on warning sign readability. Recommendations for enhancing the conspicuity of regulatory signs are proposed
Safety evaluation of improved curve delineation by Raghavan Srinivasan( )

4 editions published in 2009 in English and held by 397 WorldCat member libraries worldwide

The Federal Highway Administration (FHWA) organized a pooled fund study of 26 States to evaluate low-cost safety strategies as part of its strategic highway safety effort. One of the strategies chosen to be evaluated for this study was improving curve delineation. Geometric, traffic, and crash data were obtained at 89 treated curves in Connecticut and 139 treated curves in Washington to determine the safety effectiveness of improved curve delineation. Treatments varied by site and included new chevrons, horizontal arrows, and advance warning signs as well as the improvement of existing signs using fluorescent yellow sheeting. All sites were on two lane rural roads. To account for potential selection bias and regression to the mean, an Empirical Bayes (EB) before after analysis was conducted. The aggregate results revealed an 18% reduction in injury and fatal crashes, a 27.5% reduction in crashes during dark conditions, and a 25% reduction in lane departure crashes during dark conditions. The reductions were more prominent at locations with higher traffic volumes and sharper curves (curve radius less than 492 ft) and in locations with more hazardous roadsides (roadside hazard rating (RHR) of 5 or higher) compared to locations with less hazardous roadsides (RHR of 4 or lower). In addition, curves where more signs were either added or replaced (with a more retroreflective material) within the curve experienced larger reductions in crashes. An economic analysis revealed that improving curve delineation with signing improvements is a very cost effective treatment with the benefit cost ratio exceeding 8:1
Research & technology transporter on-line( )

in English and held by 387 WorldCat member libraries worldwide

Public roads( )

in English and held by 382 WorldCat member libraries worldwide

Keeps the reader up-to-date on developments in federal highway policies, programs, and research and technology. Covers advances and innovations in highway/traffic research and technology, critical national transportation issues, important activities and achievements of FHWA and others in the highway community, specific FHWA program areas, and subjects of interest to highway industry professionals
Effects of geosynthetic reinforcement spacing on the performance of mechanically stabilized earth walls by Christina Vulova( )

3 editions published in 2003 in English and held by 321 WorldCat member libraries worldwide

Reliability of visual inspection for highway bridges( )

3 editions published in 2001 in English and Undetermined and held by 318 WorldCat member libraries worldwide

Advanced methods for using FWD deflection-time data to predict pavement performance( )

2 editions published in 1997 in English and held by 303 WorldCat member libraries worldwide

Optimal procedures for quality assurance specifications by J. L Burati( Book )

4 editions published in 2003 in English and held by 265 WorldCat member libraries worldwide

Long-term Pavement Performance Program manual for profile measurements and processing by Rohan W Perera( )

2 editions published in 2008 in English and held by 254 WorldCat member libraries worldwide

This manual describes operational procedures for measuring longitudinal pavement profiles for the Long-Term Pavement Performance (LTPP) Program using the International Cybernetics Corporation (ICC) road profiler, Face Company Dipstick®, and the rod and level. It also contains procedures for measuring transverse profiles of the pavement using the Face Company Dipstick®. Procedures for calibration of equipment, data collection, record keeping, and maintenance of equipment for each of these profiling devices are described in this manual. This manual also describes procedures to be followed in the office when processing the profile data that were collected in the field as well as guidelines for performing inter-regional comparison tests among the LTPP profilers
Materials and methods for corrosion control of reinforced and prestressed concrete structures in new construction by United States( Book )

4 editions published in 2000 in English and held by 254 WorldCat member libraries worldwide

Salt-induced reinforcing steel corrosion in concrete bridges has undoubtedly become a considerable economic burden to many State and local transportation agencies. Since the iron in the steel has a natural tendency to revert eventually to its most stable oxide state, this problem will, unfortunately, still be with us, but to a much lesser degree due to the use of various corrosion protection strategies currently used in new construction. The adoption of corrosion protection measures in new construction, such as the use of good design and construction practices, adequate concrete cover depth, low-permeability concrete, corrosion inhibitors, and coated reinforcing steel is significantly reducing the occurrence of reinforcing steel corrosion in new bridges
 
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Associated Subjects
Air-entrained concrete--Testing Bridges--Inspection Concrete--Additives Concrete--Air content Concrete bridges--Design and construction Corrosion resistant materials Covered bridges Cycling--Safety measures Cyclists--Safety measures Engineering Geosynthetics Highway communications--Research Highway departments--U.S. states--Quality control Highway engineering Highway research Iron and steel bridges--Inspection Long-Term Pavement Performance Program (U.S.) Pavements, Asphalt concrete--Cracking Pavements, Asphalt concrete--Maintenance and repair Pavements, Asphalt--Cracking Pavements, Asphalt--Maintenance and repair Pavements, Concrete--Design and construction Pavements, Concrete--Joints Pavements, Concrete--Joints--Maintenance and repair Pavements, Concrete--Joints--Testing Pavements, Concrete--Maintenance and repair Pavements--Performance Pavements--Performance--Measurement Pedestrian accidents--Prevention Pedestrians--Safety measures Portland cement Portland cement--Evaluation Quality assurance Reinforced concrete--Corrosion--Prevention Retaining walls Road construction industry--Quality control Roads Roads--Riding qualities Sealing compounds Service life (Engineering) Soil mechanics Surface roughness--Measurement Traffic safety Traffic safety--Evaluation Traffic signs and signals Transportation--Research Turner-Fairbank Highway Research Center United States United States.--Federal Highway Administration.--Office of Operations R&D United States.--Federal Highway Administration.--Offices of Research, Development, and Technology
Alternative Names

controlled identityFairbank Highway Research Station (U.S.)

TFHRC

TFHRC (Turner-Fairbank Highway Research Center)

United States. Federal Highway Administration. Office of Research and Development. Turner-Fairbank Highway Research Center

United States. Federal Highway Administration. Office of the Associate Administrator for Research and Development (1983- )

United States. Federal Highway Administration. Offices of Research, Development, and Technology. Turner-Fairbank Highway Research Center

United States. Federal Highway Administration. Turner-Fairbank Highway Research Center

United States Office of the Associate Administrator for Research and Development (1983- )

United States Turner-Fairbank Highway Research Center

Languages
English (115)