The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations.
Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.
This study focuses on first-handlers-of-grain cooperatives for the fiscal years ending in calendar year 1991. It is comparable with studies previously conducted by the Agricultural Cooperative Service covering 1985-86 (ACS Research Report 70), 1982-83 (ACS Research Report 47), and 1979-80 (ACS Research Report 35). The statistics are expanded survey
...
The North Central Texas Council of Governments (NCTCOG) is requesting written proposals from consultants to accomplish an external travel survey during the spring of 1994. In conjunction with major workplace, household, and transit surveys programmed for calendar year 1994, the information collected from the external travel survey will be used to i
...
The North Central Texas Council of Governments (NCTCOG) intends to retain the services ofan individual consultant or consultant team to assist in the development of a program designfor new household and transit surveys. The actual surveys will be conducted in the fall of 1994by other consultants and will serve primarily to improve the transportatio
...
This study was undertaken at the request of the Texas Department of Transportation in response to its obligations under Senate Bill 352, 72nd Texas State Legislature (Texas Revised Statutes, Article 6669C) to conduct a fact-finding study in support of a state-funds contracting and procurement program for businesses owned by minorities and women. We
...
This study was undertaken at the request of the Texas Department of Transportation in response to its obligations under Senate Bill 352, 72nd Texas State Legislature (Texas Revised Statutes, Article 6669C) to conduct a fact-finding study in support of a state-funds contracting and procurement program for businesses owned by minorities and women. We
...
This study was undertaken at the request of the Texas Department of Transportation in response to its obligations under Senate Bill 352, 72nd Texas State Legislature (Texas Revised Statutes, Article 6669) to conduct a fact-finding study in support of a state-funds contracting and procurement program for businesses owned by minorities and women. We
...
The Texas legislature has authorized the issuance of annual permits allowing commercial motor vehicle operators to operate nonagricultural vehicles exceeding the legislative mandated axle weight by 10 percent and the allowable gross vehicle weight by 5 percent, with heavier loads allowed for agriculture. The $75 permit (and $15,000 bond) allows ope
...
A retaining wall is typically used to form the permanent wall of an excavation whenever space requirements make it impractical simply to slope the sides. During the last 20 years, reinforcement of the backfill has gained widespread popularity because of its flexibility, ease of installation, and economic advantages. A new design has been proposed b
...
This study evaluated the applicability, durability, and accuracy of two general systems of sensors that were used to monitor truck speeds on a freeway connector: 1) pavement sensors mounted on the surface or submerged into the pavement, and 2) roadside sensors using an infrared beam technology. Pavement sensors were predominantly temporary piezoele
...
The design, construction, operation, and maintenance of highway-rail intersections present unique challenges to both highway and railroad engineers. The railroad grade crossing represents the physical intersection of two distinctly different modes of transportation, each of which varies considerably in terms of their equipment, travelled ways, and
...
This report documents the results of laboratory studies to assess motorist interpretations of the following symbols used or initially seen as potential freeway lane control signals: red X, yellow X, green downward arrow, yellow downward diagonal arrow, yellow downward arrow, circle-slash (i.e., the universal "do not" symbol), and a red X superimpos
...
This report documents the results of field studies to assess driver response to freeway lane control signals (LCS) installed on a section of l-35W in Ft. Worth, TX. TTI researchers evaluated several alternative LCS configurations upstream of single- and double-lane closures. Researchers conducted all studies during daylight, off-peak traffic condit
...
Many tasks in the construction, maintenance, and inspection of highway systems are dangerous, repetitive, and labor intensive. Mitigation of hazards to human workers, while performing this type of work is expensive and inefficient in cases such as these, application of robotics technologies has the potential for improving some of the Department's o
...
Several algorithms have been proposed for automatically detecting incidents using freeway detector data. Some are comparative algorithms that compare measured traffic conditions to preestablished thresholds. Other use statistical procedures to detect significant changes in traffic patterns over time. Still others use complex theoretical models to p
...
A pilot survey of workplaces was conducted as part of the comprehensive travel survey in the Beaumont-Port Arthur, Texas, area. The methodology used in the pilot survey was significantly different than that used in the 1990-91 workplace surveys in Texas. The methodology used in the 1990-91 surveys was flawed in its theoretical basis. This paper ana
...
The Texas Department of Transportation (TxDOT) routinely rates public use airports using the Pavement Condition Index (PCI) distress rating and evaluation method. The PCI method rates overall pavement condition and indicates the structural integrity and operational surface condition of the pavement. The Corps of Engineers developed the PAVER manage
...
A new limited-slip portable concrete barrier (PCB) connection is presented in this report which allows a PCB to be attached to a concrete bridge deck or pavement. The performance of the new limited-slip barrier connection is demonstrated through full-scale crash tests. The new attachment scheme allows PCB's to be deployed immediately adjacent to a
...
This report documents the results of the traffic data collection efforts during the third year (October 1992 and May 1993) of reconstruction on the US-75 North Central Expressway south of the 1-635 LBJ Freeway. Traffic conditions and patterns have been monitored during October 1989 and May 1990 (before construction) and during October 1990, May 199
...
This report presents the results of the May 1993 survey of the automobile user panel established to assist in monitoring the traffic impacts of the North Central Expressway (NCE) reconstruction. Overall, only minimal changes in travel patterns and operating conditions were detected. Perhaps more importantly, the majority of panelists continued to b
...
Researchers conducted a total of eleven full-scale crash tests. Each test was conducted and evaluated in accordance with nationally recognized guidelines as contained in NCHRP Report 230. The purpose of the first eight tests was to determine the adequacy of a new, universal bracket developed by TxDOT to attach any size mailbox to the support post.
...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.