This reference manual (HEC-19) provides practical information in the evolving highway hydrology field. The information supports more resilient bridge and roadway design. Understanding of hydrologic behavior also can inform planning, design, operations, and maintenance. Following introductory material in Chapter 1 and policy context for hydrology in
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This White Paper aims to increase understanding of the role agency culture and cultural change can play in mainstreaming transportation systems management and operations (TSMO) and help agencies identify ways to influence their agency’s culture to better facilitate mainstreaming TSMO. It presents concepts from fields such as change management, indu
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2023-03-01
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FHWA Highway History Website Articles
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For, at a moment in time on April 19, 1929, "president" Harry S. Truman took part in the dedication of the monument as he had in the dedication of many of the 11 other Madonna of the Trail monuments in States the National Old Trails Road passed through.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2023-03-01
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PDF
This case study highlights practices in mainstreaming transportation systems management and operations (TSMO) at the Iowa Department of Transportation (DOT) and the Washington State Department of Transportation (WSDOT). Each agency has its own culture, and the approaches the two DOTs use illustrate mainstreaming in ways that are consistent with eac
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United States. Department of Transportation. Federal Highway Administration. Western Federal Lands Highway Division
2023-03-01
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PDF
In 2022, the United States Forest Service (USFS) requested assistance from the Federal Highway Administration (FHWA) to conduct a multi-phase corridor study for Ashton-Flagg Ranch Road (AFRR). The condition of AFRR has been relatively stable for the past twenty years, despite ongoing deferred maintenance. However, increased visitation and changes i
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2023-03-01
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At the Ohio Department of Transportation (ODOT), agency leadership and staff recognize that close coordination and joint activities between the highway safety program and the transportation systems management and operations (TSMO) program can improve safety and mobility outcomes. ODOT has long jointly considered safety and congestion and has found
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2023-03-01
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PDF
Transportation systems management and operations (TSMO) helps agencies maintain and even restore the operational performance of the existing transportation system quickly and cost effectively. Creating a culture that supports TSMO is vital to mainstreaming TSMO in an agency. Through mainstreaming, agencies ensure that leadership and key staff readi
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-03-01
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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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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-26
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PDF
The Weekly Traffic Volume Report estimates the vehicle miles traveled (VMT) for interstate highways and how the total travel measured by VMT compares with travel that occurred in the same week of the previous year. The VMT is further split into passenger vehicle and truck components. The information gives new insights into the effect on traffic by
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-24
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PDF
The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-23
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PDF
On a monthly basis, each State is required to report to the Federal Highway Administration (FHWA), the amount of gallons taxed by that state. This data is analyzed and compiled by FHWA staff. The data on the amount of on-highway fuel use for each State is then used to attribute federal revenue to each State. Yearly, the FHWA, Office of Policy, prov
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-17
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PDF
The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-17
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PDF
On a monthly basis, each State is required to report to the Federal Highway Administration (FHWA), the amount of gallons taxed by that state. This data is analyzed and compiled by FHWA staff. The data on the amount of on-highway fuel use for each State is then used to attribute federal revenue to each State. Yearly, the FHWA, Office of Policy, prov
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2023-02-13
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ZIP
The Federal Highway Administration (FHWA) developed the innovative CARMASM Platform to encourage collaboration with the goal of improving transportation efficiency and safety. FHWA's interest in advancing Transportation Systems Management and Operations (TSMO) strategies with automated driving technology is focused on how infrastructure can move tr
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-10
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PDF
The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
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United States. Department of Transportation. Federal Highway Administration
2023-02-07
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PDF
On May 6, 2022, at 87 FR 27396, FHWA published a final rule updating 23 CFR part 650, subpart C ‐ National Bridge Inspection Standards (NBIS). The final rule incorporates by reference the Specifications for the National Bridge Inventory (SNBI), which is dated March 2022. These Questions & Answers (Q&As) aim to facilitate implementation of the SNBI.
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2023-02-03
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PDF
The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
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Shared use paths and other trails are key pieces of transportation infrastructure that can also provide recreational opportunities and, as seen during the COVID-19 pandemic, improve health and wellbeing during a public health emergency. Additionally, trails can become critical infrastructure during an emergency when other transportation facilities
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Polyphosphoric acid (PPA) is a chemical modifier employed to improve high temperature rheological properties without adversely affecting low temperature rheological properties that has been used since the early 1970s.(1) Implementation of Superpave performance-grade (PG) asphalt binder acceptance specifications lead to use of PPA to aid in meeting
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The objective of this study was to assess the safety effectiveness of mini-roundabout (MR) installations based on crash data and develop statistically valid Crash Modification Factors (CMFs). The research team studied CMFs of MR locations converted from both two-way stop-control (TWSC) and all-way stop-control (AWSC) and developed separate CMFs for
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