In this project, the research team evaluated the performance of Permeable Friction Courses (PFC) over time and compared it against other types of wearing surface pavement layers. Several pavement sections including Asphalt Rubber (AR) PFCs, Performance Graded (PG) PFCs, and dense-graded Hot Mix Asphalt (HMA) were monitored over a four-year period. Non-destructive on-site measurements included noise, drainability, texture, friction, and skid. The change of these variables with time as well as the influence of traffic, binder/mixture type, aggregate classification, and climatic region was evaluated. Accident data were also gathered and analyzed on a more comprehensive number of pavement sections across Texas. All of this information was compiled in database format. In addition, when performance issues were identified, field cores were acquired for forensic evaluation. Results from the multiyear performance data analysis and previous research were used to produce guidelines and recommendations to improve the design, construction, and maintenance of PFCs.

The purpose of this report is to analyze the crash-reduction benefits of LED stop lamps and LED center high-mounted stop lamps (CHMSL) using real-world crash data.

This report provides guidance and better practice recommendations to the NPS for selecting pavement surfaces to minimize tire-pavement noise. The report contains an overview of common technologies and methods for quieter pavements, descriptions of research and quieter pavement specifications developed by several state agencies, and a directory of state agency noise and materials/pavement engineers. A brief introduction to some of the fundamentals of tire-pavement noise is included in an appendix.

The objective of this project is to investigate the data quality measures and how they are applied to travel time prediction. This project showcases a short term travel time prediction method that takes into account the data needs of the real time

This report is a statistical evaluation of the fatality- and injury-reducing effectiveness of the energy-absorbing materials in vehicles without head-protection air bags. (NHTSA previously evaluated the effectiveness of head-protection air bags in 2007.2) In one sense, this report evaluates a specific technological approach (energy-absorbing materials without air bags) that is already phasing out. But the energy-absorbing materials, themselves, will not be phasing out; they will continue to appear in new vehicles to protect occupants in crashes where the air bags do not deploy or perhaps at locations not covered by the air bags. More generally, the report investigates whether a technology demonstrated to have reduced HIC measured on headforms in laboratory testing is likewise effective in reducing the head injuries of people in crashes.

The report details how NHTSA produces these lives saved estimates for seat belts and frontal air bags. The methodology is described in detail, including the use of effectiveness ratings for seat belts and frontal air bags. Seat belt effectiveness ratings vary according to the seat belt type (i.e., 3-point belt versus 2-point lap belt), vehicle type, occupant seating position, and occupant age. Frontal air bag effectiveness ratings are consistent for all passenger vehicles. The interactions of the effectiveness of seat belts and the effectiveness of frontal air bags are discussed in this report.

Dieses Essential behandelt das spezielle Problem der Modellierung der betrieblichen Inanspruchnahme der Infrastruktur durch Zugfahrten als Voraussetzung fur die Ermittlung konfliktfreier Fahrplantrassen in der rechnergestutzten Fahrplankonstruktion. Die in den heute am Markt befindlichen Softwareloesungen realisierten Methoden, namlich das Sperrzeitmodell und die vereinfachte Betrachtung fahrplantechnischer Zugfolgeabschnitte, werden ausfuhrlich erlautert und mit ihren Vor- und Nachteilen gegenubergestellt. Diskutiert werden auch alternative Ansatze und moegliche Weiterentwicklungen.

The first generation of frontal air bags saved the lives of thousands of drivers and adult or teenage right front passengers. But they harmed occupants positioned close to the air bag at the time of deployment, especially infants and children. In 1998-1999, air bags were redesigned by depowering - by removing some of the gas-generating propellant or stored gas from their inflators - and/or by reducing the volume or rearward extent of air bags, positioning them further from occupants, tethering and hybrid inflators. NHTSA facilitated the redesign by permitting a sled test in lieu of a barrier impact to certify that air bags would protect an unrestrained occupant ("sled certification"). Statistical analyses of crash data through 2004 from NHTSA's Fatality Analysis Reporting System (FARS) and the Special Crash Investigations (SCI) compare fatality risk with sled-certified and first-generation air bags.

Run-off-road (ROR) crashes, which usually involve only a single vehicle, contribute to a large portion of fatalities and serious injuries to motor vehicle occupants. In this study, the National Motor Vehicle Crash Causation Survey (NMVCCS) data collected at crash scenes between 2005 and 2007 is used to identify the ROR critical pre-crash event, assess the critical reason for the ROR critical event, and examine associated factors present in the pre-crash phase of the ROR crash. The effect of antilock brake system (ABS) and electronic stability control (ESC) on ROR crashes is also evaluated.

This report highlights the major State-level accomplishments since 2005 in improving data systems used in traffic safety decision making. A nationwide assessment of traffic records system improvements solicited information from all NHTSA regions and all States plus the District of Columbia and U.S. territories. States were asked to report data quality improvement efforts taking place during the years following passage of the Safe Accountable Flexible Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) in 2005. The project was designed to identify improvements in crash, roadway, driver, vehicle, citation/adjudication, and injury surveillance datasets-the six major components of State traffic records systems. Improvements were sought in the data quality attributes of timeliness, accuracy, completeness, consistency, integration, and accessibility. State projects with quantitative measures showing data quality improvement are highlighted. Additional projects with qualitative evidence of data quality improvement are also described. Several States are listed as pursuing promising practices and the most effective of these are recommended for promotion to the traffic safety and traffic records community.

This publication provides an introduction to condition surveys, maintenance and repair of street and roadway pavements.

Through the U.S. Department of Transportation's (USDOT) Safe Trip-21 initiative, the USDOT is testing a variety of technologies in a number of location in California as well as along the I-95 corridor on the east coast. this document presents the evaluation findings, resulting primarily from in-person interviews the evaluation Team conducted with institutional partners.

This report presents results from the 2010 National Occupant Protections use Survey (NOPUS) Controlled Intersection Study,

Located in the center of downtown Rome, New York, Fort Stanwix currently experiences several transportation-related issues affecting visitor access to the park and overall visitor experience. As a follow-up to a 2006 Alternative Transportation Study, the goals of this report are threefold: 1) to update the 2006 study's existing conditions report to reflect recent changes that have occurred in and around the park, 2) to evaluate five specific areas of concern to the park, which were identified in the 2006 study, and 3) to identify opportunities to a) address these areas of concern; b) improve visitor experience at the park; and c) strengthen the park's relationship with the city by furthering city and county goals. The five areas of concern to the park are nonmotorized trail connections, vehicular signage and wayfinding, parking, pedestrian access, and shuttle feasibility. Findings for each of these focus areas are summarized.

This purpose of this report is to determine the effect of rear turn signal color on the likelihood of being involved in a rear-end crash. Federal Motor Vehicle Safety Standard No. 108 allows rear turn signals to be either red or amber in color. Previous work on this subject includes laboratory experiments and analyses of crash data that suggest amber rear turn signals are beneficial. The present study was designed around the concept of "switch pairs" - make-models of passenger vehicles were identified that had switched rear turn signal color, and crash involvement rates were computed before and after the switch.

The objective of this study is to analyze passenger vehicle crashes involving children up to 15 years old. The Fatality Analysis Reporting System (FARS), and National Automotive Sampling System (NASS) General estimates System (GES) were consulted to establish restraint usage trends over a 5-year period from 1998 through 2002. The study is intended to provide a better understanding of where to focus future safety efforts designed to improve highway transportation for children.

This report was one in a series of pedestrian safety synthesis reports prepared for the Federal Highway Administration (FHWA) to document pedestrian safety in other countries. Australia is a federation of States and Territories, and government responsibilities broadly mirror that in the USA. Local government is responsible for 80 percent of the road network, though the less heavily traveled parts. Australia is highly urbanized (notwithstanding large tracts of sparsely populated land). Almost 40% of the population lives in Melbourne or Sydney, and another 20% in Brisbane, Perth, and Adelaide. Australia has been a pioneer of traffic calming in the form of Local Area Traffic Management, particularly in residential neighborhoods. Innovations are evident in the traffic signal area. Puffin crossings with infrared detectors seem promising. Pelican crossings are likely to find ready application, and having them set up for double cycle operations appears to offer benefits. Australia was particularly innovative in developing the "safe routes to school" program, which integrates education, route selection, and engineering treatments to increase pupil safety. Also in development is the "walk with care" program designed for the elderly.

The National Highway Traffic Safety Administration (NHYSA) began to evaluate its federal Motor Vehicle Safety Standards (FMVSS) in 1975. By October 2004, NHTSA had evaluated the effectiveness of virtually all the life-saving technologies introduced in passenger cars, pickup trucks, sport utility vehicles and vans from about 1960 up through the later 1990's. A statistical model estimated the number of lives saved from 1960 to 2002 by the combination of these life-saving technologies. FARS data for 1975-2002 document the actual crash fatalities in vehicles that, especially in recent years, include many safety technologies. Using NHTSA's published effectiveness estimates, the model estimates how many people would have died if the vehicles had not been equipped with any of the safety technologies. In addition to equipment meeting specific FMVSS, the model tallies lives saved by installations in advance of the FMVSS, back to 1960, and by non-compulsory improvements, such as the redesign of mid and lower instrument panels. FARS data have been available since 1975, but an extension of the model allows estimates of lives saved in 1960-1974. The annual number of lives saved grew quite steadily from 1960 to 2002, when most cars and light trucks were equipped with numerous modern safety technologies and belt use on the road.

Statistical analyses based on FARS and NASS CDS data from 1997 to 2009 found that a vehicle equipped with electronic stability control (ESC) had a smaller likelihood of being involved in a crash than a similar vehicle without ESC. This analysis estimates the magnitude of that reduction for different types of crashes and for different types of vehicles.

This respected Handbook has earned its reputation as the authoritative source of information on bitumens used in road pavements and other surfacing applications. This new edition has been up-dated to ensure The Shell Bitumen Handbook retains its excellent reputation.

This guidance is provided to assist transportation planners and environmental practitioners in the use of corridor and subarea planning to inform the National Environmental Policy Act (NEPA) review process. This document responds to the need for additional guidance on how best to use corridor and subarea planning to bridge the transportation planning and NEPA processes as described in Appendix A to 23 Code of Federal Regulations (CFR) Part 450 - Linking the Transportation Planning and NEPA Processes.