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Virginia's transportation research peer exchange : July 19-21, 2010 / by Paul, Harold R.(CARDINAL)313379; Virginia Transportation Research Council.(CARDINAL)195142;
Introduction -- Peer Exchange Panel -- Charge to the Peer Exchange Panel -- Content and Format of the Peer Exchange -- Responses of the Peer Exchange Panel to the Questions.Final report.To be eligible for managing State Planning and Research (SP & R) funds, a state must agree to a peer review of its management process with regard to Research, Development, and Technology Transfer (RD & T2) efforts. The Federal Highway Administration (FHWA) interpreted the required peer reviews to be an exchange of information regarding the various practices a state uses to manage its RD & T2 programs. The intent of the regulation was to strengthen weak programs and enhance strong programs with a sharing of ideas. The peer exchange panels are typically composed of state research managers and FHWA, university, or industry personnel, at least two of whom must have received training on peer exchange procedures and guidelines provided by FHWA and be listed by FHWA as a qualified peer exchange team member. Peer exchanges are generally conducted in an informal atmosphere and last from two to four days. Techniques used to gather the information needed by the peer exchange panel include discussion of individual state practices and brainstorming sessions on the focus areas of interest to the host state. Open-ended questions are used during the interview sessions to solicit the strengths and weaknesses of the program from the user's perspective. From July 19 through 21, 2010, the Virginia Transportation Research Council (VTRC) hosted a peer exchange with state department of transportation research managers/directors from Louisiana, North Carolina, Rhode Island, and West Virginia and a representative from the Virginia Division of the FHWA.
Subjects: Technical reports.; Virginia Transportation Research Council; Peer review; Transportation;
Available copies: 1 / Total copies: 1
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Orange County road orders, 1734-1749 / by Miller, Ann Brush.(CARDINAL)181518; Virginia Highway & Transportation Research Council.(CARDINAL)141133; Orange County Historical Society (Va.)(CARDINAL)195024;
Subjects: Family histories.; Roads;
Available copies: 0 / Total copies: 1
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Factors associated with fatal pedestrian crashes in Virginia's urban areas-1985-1987 : final report / by Worthington, Michael E.(CARDINAL)311410; Virginia Transportation Research Council.(CARDINAL)195142;
Includes bibliographical references (pages 35-37).Between 1985 and 1987, a total of 400 pedestrians were fatally injured in Virginia; more than half of the pedestrian fatalities occurred in an urban area of the Commonwealth. Because little research had been conducted on urban pedestrian fatalities in Virginia, the Virginia Department of Motor Vehicles requested that the Virginia Transportation Research Council investigate the Commonwealth's urban pedestrian fatalities during the period 1985 to 1987. The purpose of the study was to identify situations and characteristics associated with urban pedestrian fatalities and, subsequently, to use the information to develop pedestrian safety measures. The study includes a literature review; an examination of accident reports of fatal pedestrian crashes occurring during the study period; and an analysis of pedestrian characteristics, driver actions, roadway and environmental factors, and vehicle factors present in the crashes. Overall, negligent pedestrian behavior contributed to urban pedestrian fatalities more than factors related to driver behavior, the roadway and environment at the crash site, or the vehicle itself. Alcohol use by the pedestrian was also found to be a major factor in urban pedestrian fatalities. High-risk periods are the end of the week and weekends, late afternoon to late evening, darkness, and fall and winter. Elderly pedestrians have greater difficulty negotiating complex situations and are more likely than younger persons to be fatally injured when struck by a vehicle. Across all age groups, males have a higher fatality rate.
Subjects: Statistics.; Technical reports.; Mortality; Traffic accidents;
Available copies: 1 / Total copies: 1
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Evaluation of modified single seal surface treatments / by Maupin, G. W.(CARDINAL)754762; Payne, Charles W.(CARDINAL)314552; Virginia.Department of Transportation.(CARDINAL)291718; University of Virginia.(CARDINAL)141178; Virginia Transportation Research Council.(CARDINAL)195142;
Includes bibliographical references (page 16).Final report.This report describes a field study of a multicourse asphalt emulsion chip seal, designated as a modified single seal. The treatment, already used in North Carolina, consists of an application of emulsion and coarse aggregate followed by another application of emulsion and a final layer of fine aggregate. Sixty sections were placed in three districts in 1986-88, totaling approximately 400 lane-km of surfacing. These sections were evaluated periodically by a team of local operations personnel and research staff. The operations personnel also provided estimates of service life for conventional single chip seals, used for a cost-benefit analysis. The modified seals performed better and were more cost-effective than conventional surface treatments. Also, the hazard of broken windshields caused by loose aggregate was virtually eliminated on the modified seal treatments. The report includes recommendations for ensuring that the final product is of high quality. The recommendations include using a pilot vehicle, limiting the speed of construction traffic, using clean dry blot aggregate, applying the coarse aggregate not more than one stone thick, and using the proper nozzles on the asphalt distributor.Sponsored by the Virginia Dept. of Transportation and the University of Virginia. Performed by Virginia Transportation Research Council, under project no.
Subjects: Technical reports.; Asphalt emulsion mixtures.; Pavements; Sealing compounds.;
Available copies: 1 / Total copies: 1
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Evaluation of novophalt as an additive in asphalt / by Maupin, G. W.(CARDINAL)754762; Virginia Transportation Research Council.(CARDINAL)195142;
Includes bibliographical references (page 23).Interim report.Novophalt, which is an ethylene vinyl acetate polymer, was used as an asphalt additive in a test section in an attempt to determine whether it is useful in the prevention of rutting. A special blending unit was required to blend the asphalt cement and polymer at the hot-mix plant; however, construction of the control and polymer test sections went smoothly with no problems. Various laboratory tests on the mixtures with and without polymer revealed some possible mixture deficiencies, which could cause pavement distress in the future. Measurements 10 months after construction revealed excessive rutting in one section containing polymer. A follow-up coring investigation revealed that most of the rutting was confined to the underlying base mixture and was caused by a lack of control of aggregate gradation and asphalt content.Sponsored by the Virginia Department of Transportation and the University of Virginia. Performed by Virginia Transportation Research Council, under project no.
Subjects: Technical reports.; Pavements, Asphalt; Pavements, Asphalt; Pavements; Polymers.;
Available copies: 1 / Total copies: 1
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Detection of abandoned underground storage tanks in rights-of-way with ground-penetrating radar / by Clemeña, G. G.(Gerardo G.)(CARDINAL)314479; French, Alan W.; Virginia Transportation Research Council.(CARDINAL)195142;
Includes bibliographical references (page 18).Final report.Highway agencies need a simple, effective, nondestructive way to inspect certain properties in rights-of-way for the possible presence of abandoned underground [fuel]storage tanks, without disturbing the ground, before actual construction begins. Overall, ground-penetrating radar (GPR) fills this need better than other nondestructive methods. This report explains why GPR was chosen over the other nondestructive methods available, discusses the principle of GPR, describes the basic radar equipment needed and the general procedures involved in conducting such inspections, and provides examples of the type of radar data such inspections produce.Sponsored by the Virginia Department of Transportation, and the University of Virginia, under project no.
Subjects: Technical reports.; Ground penetrating radar.; Petroleum products; Roads; Underground storage;
Available copies: 1 / Total copies: 1
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Evaluation of surface treatments / by Payne, Charles W.(CARDINAL)314552; Mahone, David C.(David Crenshaw)(CARDINAL)314551; Virginia Transportation Research Council.(CARDINAL)195142;
Includes bibliographical references (page 27).State report;This report describes the installation, evaluation, and performance of surface treatment test sections placed during 1983, 1984, and 1985. The study was initiated because of adhesion problems between asphalt and river gravel in the Fredericksburg District. However, observations by the researchers and complaints from other districts indicated that adhesion problems were also prevalent when crushed stone was used as the cover material. The study was continued through 1985 in order to include crushed stone. The results of this study indicate that the quality of a surface treatment is greatly influenced by the quantity of aggregate used, its cleanliness, the type and gradation of the aggregate, material adhesion, and construction techniques. It was found that some gravels perform better than others, but none perform as well as crushed stone. It was also learned that steel wheel rollers embed aggregate better than rubber tire rollers, but because of the irregular cross sections of so many secondary roads, the two should be used together. The recommendations in this report include the following: material quantities should be determined by a design method; adjustments should be made for road surface characteristics and traffic speeds and volumes; better construction techniques should be employed; river gravels should not be used on roads in traffic groups V and above; and, because of the problems caused by the wide tolerance in gradation on the No. 4 screen of the No. 8 aggregate used in surface treatments, the gradation should be changed to 12 percent + 12 percent passing the No. 4 screen, 2 percent + 2 percent passing the No. 8 screen, and 1 percent + 1 percent passing the No. 16 screen.Sponsored by the Virginia Department of Transportation and the University of Virginia. Performed by Virginia Transportation Research Council, under project no.
Subjects: Technical reports.; Pavements, Asphalt; Pavements; Pavements;
Available copies: 1 / Total copies: 1
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Installation and early performance of a field test section of asphalt rubber concrete / by Maupin, G. W.(CARDINAL)754762; Virginia Transportation Research Council.(CARDINAL)195142;
Includes bibliographical references (pages 21-22).Interim report.Asphalt rubber, which is produced by reacting asphalt cement and crumb rubber, is claimed to increase fatigue life and reduce rutting of asphalt concrete; however, the service life must be increased significantly to offset the additional coast of adding the rubber. In order to assess the performance of asphalt rubber mixtures and how effectively they can be used in construction, text sections of asphalt concrete surface courses using either asphalt rubber binder or the conventional binder were installed on a heavily traveled highway in Northern Virginia. Special equipment was required to blend the asphalt cement and crumb rubber; however, the production of the mixture and construction of the test sections were accomplished with minimal problems. Various laboratory tests including Marshall, gyratory shear, creep, resilient modulus, indirect tensile strength, and stripping were used to evaluate the mixtures in the laboratory. The results indicated that the asphalt rubber mixtures were more susceptible to permanent deformation than the same mixtures without rubber; however, the conventional temperature at which the mixtures were compacted and tested with the gyratory shear machine may not have presented a true estimate of performance because pavement deformation occurs at lower temperatures. Friction numbers of one section of asphalt rubber mixture were significantly lower at a 95 percent confidence level than friction numbers of the other asphalt rubber section, possibly the result of the pavement surface being filled by soil from a nearby construction project. However, there was no difference at a 95 percent confidence level between the average friction values of the control and asphalt rubber sections. Surveys of pavement performance, measurements of rut depth, and friction tests will be conducted periodically, and a final report will be published June 30,1994.Sponsored by the Virginia Department of Transportation [and] the University of Virginia. Performed by Virginia Transportation Research Council.
Subjects: Technical reports.; Asphalt-rubber.; Pavements, Asphalt concrete; Pavements;
Available copies: 1 / Total copies: 1
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An observational survey of safety belt and child safety seat use in Virginia : final report : the 1990 update / by Stoke, Charles B.(CARDINAL)311175; Virginia Transportation Research Council.(CARDINAL)195142;
This report was prepared in response to a request from the Transportation Safety Administration of the Virginia Department of motor Vehicles for data concerning the use of safety belts and child safety seats by the occupants of vehicles bearing Virginia license plates. In an effort to track changes in safety belt use as a result of various statutory enactments, enforcement campaigns, and public information efforts, a series of surveys were conducted over two time periods: (1) 1974 through 1977, and (2) 1983 through 1990. Until 1987, data were collected in only the four major metropolitan areas of the state. In 1987, survey sites were added in nine smaller communities. These communities are referred to as "towns," although several are legally classified as cities. Prior to enactment of the child safety seat law in 1982 and the safety belt mandatory use law in 1987, safety seat and belt use by the affected groups (children under 4 years of age and all front seat occupants, respectively) showed small yearly increases. After the effective date of each of the statutes, there was a markedly large increase in use by both target groups. The safety seat use rate remained relatively stable over the entire 8-year postlaw period, at approximately 66% of those surveyed. The front seat occupant rate peaked at nearly 62% in the first 6 months after the effective date of the law, declined to about 55% (p < .01) in 1989, and was nearly 57% in 1990. A number of other findings are presented in the report. Among these are the following: (1) belt use was highest in the northern area of the state; (2) there was little difference in use rates throughout the day; (3) a large proportion of child safety seats were misused in an obvious way; and (4) with the exception of infants, older adults had the highest rates of use. It was concluded that the major reason for the increase in safety seat and belt use was the passage of the statutes. Several actions are recommended to increase statewide safety belt use. These include (1) directing public information and enforcement efforts toward residents of smaller communities and rural areas, occupants of the rear seat, young males, and areas of the state where use rates are below 50%, and (2) amending the safety belt mandatory use law to include rear seat occupants.
Subjects: Statistics.; Technical reports.; Automobiles; Child restraint systems in automobiles; Traffic safety and children;
Available copies: 1 / Total copies: 1
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Investigation of bridge deck cracking on I-95 northbound over Powell Creek / by Lane, D. Stephen(Daniel Stephen)(CARDINAL)314554; Virginia.Department of Transportation.(CARDINAL)291718; University of Virginia.(CARDINAL)141178;
Include bibliographical references (page 11).
Subjects: Concrete bridges; Concrete bridges;
Available copies: 1 / Total copies: 1
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