The Effects of Long-Duration Subduction Earthquakes on Inelastic Behavior of Bridge Pile Foundations Subjected to Liquefaction-Induced Lateral Spreading

Effective-stress nonlinear dynamic analyses (NDA) were performed for a large-diameter reinforced concrete (RC) pile in multi-layered liquefiable sloped ground. The objective was to assess the effects of earthquake duration on the combination of inertia and liquefaction-induced lateral spreading. A parametric study was performed using input motions from subduction and crustal earthquakes covering a wide range of motion durations. The NDA results showed that the pile head displacements increased under liquefied conditions, compared to nonliquefied conditions, due to liquefaction-induced lateral spreading. The NDA results were used to develop a displacement-based equivalent static analysis (ESA) method that combines inertial and lateral spreading loads for estimating elastic and inelastic pile demands

Approaching the "smart growth" issue : a look at best practices used by transportation planning organizations.

A fundamental public policy decision implicitly addressed by agencies responsible for urban transportation planning is the right of the individual versus the goal of the community. This question arises in considering the role that state and local officials should play within the context of transportation and land development, specifically the "smart growth" movement. Although there is no universally accepted definition of "smart growth", discrete actions being implemented or advocated under that rubric reveal that smart growth is viewed as a range of regulatory, financial, and educational practices that may help to coordinate transportation and land use through integrated planning. Practices helpful in this coordination include communications, consensus building, and legislative efforts that improve the dialogue, reduce polarization, and enable coordination of transportation and land use decisions. None of these practices requires the use of the "smart growth" label; instead, they expose tangible initiatives that can be publicly debated. Only when referring to specific initiatives (rather than the general slogan "smart growth") is it fair to ask a community or an organization to take a position on the issue of individual autonomy versus communal desires. This paper discusses critical policy issues facing agencies responsible for land use planning, reviews organizational approaches to resolving smart growth issues, and suggests practices to enhance community participation

Technique for estimating magnitude and frequency of peak flows in Delaware /

Three maps on 3 folded leaves in pocket. Some copies issued without pockets and in plastic containers.Shipping list no.: 96-0172-P.Includes bibliographical references (p. 17).Mode of access: Internet

Evaluation of bicycle and pedestrian facilities : user satisfaction and perceptions on three shared use trails in Texas

87 p. Illustrations, MapsThis report describes research conducted to evaluate bicycle and pedestrian facilities (i.e., shared use trails) with user satisfaction and perception surveys. Public and community input on transportation projects is often mentioned as a necessary step in the planning process but seldom perfonned. The opinions and perceptions of facility users are immensely valuable in improving conditions at current trails as well as in the development and design of new trails. In this study, the research team developed on-site and mail-back survey instruments that were distributed on three shared use trails in Texas: the Brays and Buffalo Bayou Trails in Houston, and the Shoal Creek Trail in Austin. The responses to the surveys were analyzed to determine consistent themes and trends in user satisfaction and perceptions. The study found that several trail attributes contribute significantly to user satisfaction and higher levels of trail use. Adequate separation from motor vehicles was noted as a positive attribute that should be provided whenever possible on s~ed use trails. Trail surface quality and width was also noted as an important attribute, particularly in cases where numerous user types (e.g., bicyclists, joggers, walkers) were using the same trail. The study also revealed that many of the trail users felt that the shared use trails significantly contributed to hannonizing transportation and community goals. The survey responses indicated that the trails were used for a variety of purposes, including transportation, recreation, social interaction, and enjoyment of the natural environment. The researchers concluded that user surveys (such as those conducted in this study) are a valuable addition to other traditional transportation planning tools, and as such, can provide more and better insight into roadway and trail user behavior and motivation

Detection of underground voids in Ohio by use of geophysical methods /

Shipping list no.: 98-0099-P."Federal Highway Administration"--Cover.Includes bibliographical references (p. 26-28).Mode of access: Internet

Peak-flow characteristics of Wyoming streams /

2 color folded maps in back pocket.Includes bibliographical references (p. 37-39).Mode of access: Internet

Scour assessments and sediment-transport simulation for selected bridge sites in South Dakota /

Shipping list no.: 96-0355-P.Includes bibliographical references (p. 66-67).Mode of access: Internet

Use of borehole and surface geophysics to investigate ground-water quality near a road-deicing salt-storage facility, Valparaiso, Indiana /

"Prepared in cooperation with the Indiana Department of Transportation."Shipping list no.: 2001-0184-P.Includes bibliographical references (p. 40-42).Mode of access: Internet

Geohydrology and contamination at the Michigan Department of Transportation maintenance garage area, Kalamazoo County, Michigan /

Includes bibliographical references (p. 25).Mode of access: Internet