Much of the fundamental basis for the current lightweight concrete provisions in the AASHTO LRFD Bridge Design Specifications is based on research of lightweight concrete (LWC) from the 1960s. The LWC that was part of this research used traditional mixes of coarse aggregate, fine aggregate, portland cement, and water. Broad-based advancement in con
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Ultra-high performance concrete (UHPC) is a class of cementitious composite materials designed to exhibit exceptional mechanical and durability properties, including sustained postcracking tensile strength. Laboratory tests of structural elements have clearly indicated that UHPC components can exhibit tensile mechanical properties far in excess of
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Successes in Stewardship is a Federal Highway Administration (FHWA) bimonthly newsletter highlighting current best practices in stewardship and environmental review from around the country.
This report documents how metropolitan planning organizations (MPO), State departments of transportation (DOT), and other transportation agencies are adapting Environmental Justice (EJ) analysis techniques to understand transportation impacts in communities undergoing rapid demographic change. The report also highlights national demographic trends,
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United States. Department of Transportation. Federal Highway Administration
2019-02-01
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Over the past 16 years, the proportion of trips reported by six age groups (i.e., 13–15, 16–17, 18–34, 35–64, 65–74, and 75+) has remained relatively stable. As shown in figure 1, according to the 2001, 2009, and 2017 National Household Travel Survey (NHTS), travel by teens (i.e., ages 13–17) has steadily accounted for 7% of all trips reported in e
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United States. Department of Transportation. Federal Highway Administration
2019-02-01
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PDF
The National Household Travel Survey (NHTS) is designed to provide a snapshot of demographic and travel behavior across the United States. While an essential part of the survey is to obtain details of daily person travel, it also includes an attitudinal component where respondents are given the opportunity to provide their opinions on several topic
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In supporting State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) in using Geographic Information Systems, the Federal Highway Administration (FHWA) is publishing this Case Study Report focusing on the use of mobile applications by transportation agencies to collect and manage geospatial asset data. To gather i
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Rising commercial traffic volumes, staffing cuts, and expanding roadside enforcement personnel roles and responsibilities are stretching the ability of States to conduct effective commercial vehicle enforcement. To address this, the Federal Highway Administration’s (FHWA) Office of Freight Management and Operations and the Federal Motor Carrier Saf
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United States. Department of Transportation. Federal Highway Administration
2019-02-01
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PDF
Transit services play a vital role in the ability of Americans to access work, school, shopping, and other daily activities. The National Household Travel Survey (NHTS) provides insights into when, where, and how transit is used and by whom. Other national statistics on transit ridership include the National Transit Database (NTD) and the American
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The Tampa Hillsborough Expressway Authority (THEA) Connected Vehicle (CV) Pilot Deployment Program is intended to develop a suite of applications that utilize vehicle-to-infrastructure (V2I) and vehicle-to-vehicle (V2V) communication technology to reduce traffic congestion, improve safety, and decrease emissions. These CV applications support a fle
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This large-scale study, based on the Motorcycle Crash Causation Study (MCCS) sponsored by the National Highway Traffic Safety Administration, gathered data on motorcycle (MC) crashes by intensive post-crash investigations and control MC observations and interviews conducted in Orange County, CA. The study developed a dataset that researchers can us
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This document is a resource to help transportation practitioners consider and make informed decisions about tradeoffs relating to the selection of bikeway types. This report highlights linkages between the bikeway selection process and the transportation planning process. This guide presents these factors and considerations in a practical process o
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In supporting State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) in using Geographic Information Systems, the Federal Highway Administration (FHWA) is publishing this Case Study Report focusing on the use of mobile applications by transportation agencies to collect and manage geospatial asset data. To gather i
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2019-02-01
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PDF
Advancements in the science of concrete materials have led to the development of a new class of cementitious composites called ultra-high performance concrete (UHPC). UHPC exhibits mechanical and durability properties that make it ideal for use in new solutions to pressing concerns about highway-infrastructure deterioration, repair, and replacement
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2019-02-01
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PDF
Traffic Volume Trends is a monthly report based on hourly traffic count data reported by the States. These data are collected at approximately 5,000 continuous traffic counting locations nationwide and are used to estimate the percent change in traffic for the current month compared with the same month in the previous year. Estimates are re-adjuste
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The Tampa Hillsborough Expressway Authority (THEA) Connected Vehicle (CV) Pilot Deployment Program is developing a suite of CV applications, or apps, that utilize vehicle-to-infrastructure (V2I), vehicle-to-vehicle (V2V) and Vehicle to everything (V2X) communication technology to reduce traffic congestion, improve safety, and decrease emissions. Th
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Since 1995, a Science and Technology Implementing Arrangement between the United States Department of Transportation’s (USDOT) Federal Highway Administration (FHWA) and the Republic of Korea’s Ministry of Land, Infrastructure and Transport (MOLIT) has made cooperation between these two governmental agencies a priority. The arrangement has led to an
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The New Mexico Department of Transportation (NMDOT) rehabilitated about 8.7 miles (milepoint 0.448 to milepoint 9.168) of New Mexico State Road 136 (NM 136) in Dona Ana County, just northwest of El Paso, TX. This four-lane arterial roadway serves as a connection between the Santa Teresa Port of Entry and Interstate 10 (I-10) near the Texas State Li
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This report documents the state of the practice among State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) regarding how these agencies are considering and addressing environmental justice concerns in their transportation planning and programming process. Based on a detailed scan of publicly available planning a
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