Recent Publications.Below are brief descriptions of the reports recently published by the Federal Highway Administration's (FHWA FHWA Federal Highway Administration (US DoT) ) Office of Research, Development, and Technology. All the publications are available from the National Technical Information Service (NTIS NTIS - National Technical Information Service ). In some cases, limited copies of the publication are available from the Research and Technology (R&T) Report Center.When ordering from NTIS, include the NTIS PB number (or publication number) and the publication title. You may also visit the NTIS Web site at www.ntis.gov to order publications online. For customers outside the United States, Canada, and Mexico, the cost is double the listed price. Address requests to: National Technical Information Service 5285 Port Royal Road Telephone: (703) 605-6000 Springfield, VA 22161 Requests for items available from the R&T Report Center should be addressed to: Federal Highway Administration The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two "programs," The Federal-aid Highway Program and the Federal Lands Highway RD&T Report Center, HRTS HRTS High Resolution Telescope and Spectrograph (orbiting solar observatory) HRTS Hollywood Radio and Television Society HRTS High-Resolution Telescope Spectrograph HRTS High Resolution Telescope Spectrometer 9701 Philadelphia Court, Unit Q Telephone: (301) 577-0818 Lanham, MD 20706 For more information on research and technology publications coming from FHWA, visit the Turner-Fairbank Highway Research Center's (TFHRC TFHRC Turner-Fairbank Highway Research Center ) Web site at www.tfhrc.gov, FHWA's Web site at www.fhwa.dot.gov, or the OneDOT information network at http.//isweb.tasc.dot.gov/library/library.htm. Testing of State Roadside Systems, Volume I: Technical Report Testing of State Roadside Systems, Volume II: Appendix A--Crash Testing and Evaluation of a Michigan Thrie-Beam Transition Design Publication No. FHWA-RD-98-036 Testing of State Roadside Systems, Volume III: Appendix B--Crash Testing and Evaluation of a Guardrail System for Low-Fill Culvert Publication No. FHWA-RD-98-037 Testing of State Roadside Systems, Volume IV: Appendix C--Crash Testing and Evaluation of a Pennsylvania Transition Design Publication No. FHWA-RD-98-038 Testing of State Roadside Systems, Volume XI: Appendix J--Crash Testing and Evaluation of Existing Guardrail Systems Publication No. FHWA-RD-98-039 These studies were conducted to crash test and evaluate new or modified safety hardware and, where necessary, redesign the devices to improve their impact performance. Publication No. FHWA-RD-98-046 The three major areas addressed in this study are the impact performance of bridge railings, transitions from guardrails to bridge railings, and end treatments for guardrails and median barriers. The NTIS numbers and costs for these publications are as follows: * Volume I, PB99-155079; $60 for a paper copy or $23 for the report on microfiche. * Volume II, PB99-155087; $25.50 for a paper copy or $12 for the report on microfiche. * Volume III, PB99-155095; $29.50 for a paper copy or $12 for the report on microfiche. * Volume IV, PB99-155103; $25.50 for a paper copy or $12 for the report on microfiche. * Volume XI, PB99-155111; $47 for a paper copy or $23 for the report on microfiche. Guidebook on Methods to Estimate Non-Motorized Travel: Overview of Methods Guidebook on Methods to Estimate Non-Motorized Travel: Supporting Documentation Publication Nos. FHWA-RD-98-165 and FHWA-RD 98-166 This guidebook provides a means for practitioners to better understand and estimate bicycle and pedestrian travel and to address transportation planning needs. The guide-book describes and compares the various methods that can be used to forecast the demand of non-motorized travel and supports the prioritization analyses of non-motorized projects. These methods are categorized according to four major purposes: (1) demand estimation, (2) relative demand potential, (3) support quality analysis, and (4) supporting tools and techniques. Discrete choice models, regional travel models, sketch plan methods, facility demand potential, bicycle compatibility measures, and geographic information systems are among the methods and tools described. The NTIS number for the Overview of Methods is PB99-166175; the cost is $27 for a paper copy or $12 for the report on microfiche. The NTIS number for the Supporting Documentation is PB99-166183; the cost is $44 for a paper copy or $17 for the report on microfiche. Calcium Magnesium Acetate Calcium magnesium acetate is an alternative to road salt. It is approximately as corrosive as normal tap water, and in varying concentrations can be effective in stopping road ice from forming down to ~27.5 °C (its Eutectic temperature). at a Lower Production Cost: Production of CMA CMA - Concert Multithread Architecture from DEC. Deicer de·ic·er n. 1. A device used on an aircraft to keep the wings and propeller free from ice or to remove ice after it has formed. 2. A compound, such as ethylene glycol, used to prevent the formation of ice, as on windshields. From Cheese Whey whey liquid residue from milk after the removal of cheese curds in the manufacture of cheese. An excellent protein supplement but difficult to handle in the liquid form, except to pigs maintained close to the cheese factory. Dried whey is easy to handle but processing costs are high. Publication No. FHWA-RD-98-174 Calcium magnesium acetate (CMA), a mixture of calcium acetate calcium acetate Phos-Ex (UK), PhosLo, PhosLo Gelcap Pharmacologic class: Mineral Therapeutic class: Dietary supplement, electrolyte replacement agent Pregnancy risk category C and magnesium acetate, is used as an environmentally benign roadway deicer. The present commercial CMA deicer made from glacial acetic acid glacial acetic acid n. Acetic acid that is at least 99.8 percent pure. and dolomitic dol·o·mite n. 1. A white or light-colored mineral, essentially CaMg(CO3)2, used in fertilizer, as a furnace refractory, and as a construction and ceramic material. 2. lime or limestone is expensive compared to salt and other deicers. The goal of this project was to develop low-cost acetate deicers from cheap feedstocks, such as biomass and industrial wastes, via fermentation. Two alternative methods to produce low-cost acetate deicers from cheese whey were studied. CMA deicers produced from cheese whey by fermentation and extraction were tested for their acetate content and deicing De-icing is the process of removing ice from a surface. Anti-icing is the process of preventing ice from forming on a surface. Deicing can be accomplished by mechanical methods (scraping), through the application of heat, by use of chemicals designed to lower properties. The NTIS number is PB99-l48991; the cost is $36 for a paper copy or $17 for the report on microfiche. Pipe Interaction With the Backfill back·fill n. Material used to refill an excavated area. tr.v. back·filled, back·fill·ing, back·fills To refill (an excavated area) with such material. Envelope Publication No. FHWA-RD-98-191 This report summarizes a study of installation practices for buried (culvert) pipes. Current practice was reviewed through a literature search and a survey of users, manufacturers, and others involved in the use of buried pipes. Typical backfill materials were characterized through standard and variable effort compaction tests, CBR (1) (Computer-Based Reference) Reference materials accessible by computer in order to help people do their jobs quicker. For example, this database on disk! (2) (Constant Bit Rate) A uniform transmission rate. tests, penetration tests, and one-dimensional compression tests. Standard classification systems were compared and standard groups of backfill materials were evaluated. The soil properties that were used to develop the American Association of State Highway and Transportation Officials' SIDD SIDD Software Interface Design Description SIDD Servicing Implementation Definition Document SIDD Single Integrated Digital Device designs are proposed for use as standard properties for application to the installation of all types of pipes. The NTIS number is PB99-153603; the cost is $56 for a paper copy or $23 for the report on microfiche. Evaluation of Emergency Vehicle Signal Preemption preemption U.S. policy that allowed the first settlers, or squatters, on public land to buy the land they had improved. Since improved land, coveted by speculators, was often priced too high for squatters to buy at auction, temporary preemptive laws allowed them to acquire on the Route 7 Virginia Corridor Publication No. FHWA-RD-99-070 This study analyzed the impact of emergency vehicle traffic signal preemption Traffic signal preemption is a type of system that allows the normal operation of traffic lights to be preempted, often to assist emergency vehicles. The most common use of these systems is to allow emergency vehicles priority by changing traffic signals in the path of the vehicle across three coordinated intersections on Route 7 (Leesburg Pike near Landsdowne) in Virginia. FHWA's Traffic Software Integrated System package, which includes the CORSIM simulation model and the vehicle animator, TRAFVU, was used for this study. Using FHWA's Traffic Research Laboratory as a test bed, ITT ITT Initial Teacher Training (UK) ITT I Think That ITT Invitation To Tender ITT Individual Time Trial (professional cycling) ITT Intention-To-Treat ITT In This Thread (forums) Systems utilized the Controller Interface Device to interface a modified version of the CORSIM simulation with Type 170 controllers programmed with the identical signal plans to those existing at the Route 7 intersections, with minor modifications to allow signal preemption. The NTIS number is PB99-157950; the cost is $25.50 for a paper copy or $12 for the report on microfiche. Preliminary Evaluation of LTPP LTPP Long-Term Pavement Performance LTPP Long Term Planning Project Continuously Reinforced Concrete (CRC (Cyclical Redundancy Checking) An error checking technique used to ensure the accuracy of transmitting digital data. The transmitted messages are divided into predetermined lengths which, used as dividends, are divided by a fixed divisor. ) Pavement Test Sections Publication No. FHWA-RD-99-086 As part of the study, analysis of data from the Long Term Pavement Performance (LTPP) GPS-5 test section was conducted to identify factors that influence long-term crack spacing in CRC pavements and determine the effects of crack spacing on pavement performance. Data from the 85 test sections from the GPS-5 experiment were analyzed. The NTIS number is PB99-162778; the cost is $27 for a paper copy or $12 for the report on microfiche. Remote Methods of Underwater Inspection of Bridge Structures Publication No. FHWA-RD-99-100 A portable trailer-mounted bridge scour inspector was developed and tested under flood conditions for inspecting bridge scour in the vicinity of piers from bridge decks. The bridge scour inspector features a remotely controlled arm to deploy a sonar probe in the water from a vehicle located on the bridge deck. The bridge scour inspector was field tested under low water conditions in Texas and was field tested under extreme flood conditions in Georgia during the 1994 Tropical Storm Alberta flooding. A more sophisticated remotely controlled work station was designed conceptually and is described in the report, but was not fabricated for testing. This system could be used above and below the water surface to inspect and repair bridges. The NTIS number is PB99-157968; the cost is $33 for a paper copy or $17 for the report on microfiche. Analysis of Time-Domain Reflectometry Data From LTPP Seasonal Monitoring Program Test Sections -- Final Report Publication No. FHWA-RD-99-115 Time domain reflectometry (TDR TDR - time domain reflectometer ) has become one of the most reliable methods for measuring in situ soil moisture content. TDR sensors developed by FHWA are being used in the LTPP Seasonal Monitoring Program to monitor the in situ moisture content at selected LTPP sites. The main goal of the study reported here was to develop procedures to produce good estimates of in situ gravimetric moisture content. All the TDR traces in the LTPP database were processed using the approach described in this report. The NTIS number is PB99-146607; the cost is $47 for a paper copy or $23 for the report on microfiche. |
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