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Author: Iowa Safety Management System. Task Force on Speed Limits
Publisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 68
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Book Description
"This report is a compilation of data gathered in Iowa and from other states regarding speed limit changes and pre- and post-change travel speeds, crashes, injuries, and fatalities"--P. v.
Author: Iowa Safety Management System. Task Force on Speed Limits
Publisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 68
Get Book Here
Book Description
"This report is a compilation of data gathered in Iowa and from other states regarding speed limit changes and pre- and post-change travel speeds, crashes, injuries, and fatalities"--P. v.
Author: Sherry L. Skszek
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 112
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Book Description
Author: Reginald R. Souleyrette
Publisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 56
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Book Description
On July 1, 2005, the State of Iowa implemented a 70 mile per hour (mph) speed limit on most rural Interstates. This document reports on a study of the safety effect of this change. Changes in speeds, traffic volume on and off the rural Interstate system (diversion), and safety (crashes) for on- and off-system roads were studied. After the change, mean and 85th percentile speeds increased by about 2 mph on rural Interstates, but speeding was reduced (the number of drivers exceeding the speed limit by 10 mph decreased from 20% to about 8%). In keeping with longer term trends, volumes also increased (about 5%, which was as expected). There was no evidence of traffic shift (diversion) from off-system to on-system (rural Interstate) roads. Daytime and nighttime serious crashes were studied for a period of 14 1/2 years prior to the change and 2 1/2 years afterwards. Due to limitations of data, cross-median crashes were studied for 4 1/2 years before and 2 1/2 years after. Simple descriptive statistics reveal increases in all crash severity categories for the 2 1/2 year period following the speed limit increase when compared to the most recent comparable 2 1/2-year period prior to the increase. When compared to longer term trends, the increases were less pronounced in some severity levels and types, and for a few severity levels the average crash frequencies were observed to decrease. Few of the changes in crash frequency were larger than the normal year to year variation in these statistics. However, fatal and other serious cross-median crashes increased by relatively larger amounts as compared to expected random variation. Most of this increase was concentrated in the last half of 2005 and represents relatively small numbers of crashes (statistically speaking). The study also analyzed crash frequencies grouped into six-month periods, revealing similar findings. To more rigorously test for statistical significance in the findings, a generalized regression model was fit to the time series data. The model found that none of the results nor the short term trend were significant at the 95% confidence level, although several results were found to be significant at lower confidence levels.
Author:
Publisher:
ISBN:
Category : Traffic safety
Languages : en
Pages : 294
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Book Description
Author:
Publisher:
ISBN:
Category : Speed limits
Languages : en
Pages : 204
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Book Description
Author: United States. Congress. House. Committee on Public Works
Publisher:
ISBN:
Category : Legislative hearings
Languages : en
Pages : 1502
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Author:
Publisher:
ISBN:
Category : Transportation
Languages : en
Pages : 672
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Book Description
Author:
Publisher: Transportation Research Board
ISBN: 9780309065023
Category : Business & Economics
Languages : en
Pages : 444
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Book Description
TRB Special Report 254 - Managing Speed: Review of Current Practices for Setting and Enforcing Speed Limits reviews practices for setting and enforcing speed limits on all types of roads and provides guidance to state and local governments on appropriate methods of setting speed limits and related enforcement strategies. Following an executive summary, the report is presented in six chapters and five appendices.
Author:
Publisher:
ISBN:
Category : Traffic safety
Languages : en
Pages : 386
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Book Description
Author: Sarah A. Seo
Publisher: Harvard University Press
ISBN: 0674980867
Category : History
Languages : en
Pages : 353
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Book Description
A Smithsonian Best History Book of the Year Winner of the Littleton-Griswold Prize Winner of the Ralph Waldo Emerson Award Winner of the Order of the Coif Award Winner of the Sidney M. Edelstein Prize Winner of the David J. Langum Sr. Prize in American Legal History Winner of the Berkshire Conference of Women Historians Book Prize “From traffic stops to parking tickets, Seo traces the history of cars alongside the history of crime and discovers that the two are inextricably linked.” —Smithsonian When Americans think of freedom, they often picture the open road. Yet nowhere are we more likely to encounter the long arm of the law than in our cars. Sarah Seo reveals how the rise of the automobile led us to accept—and expect—pervasive police power, a radical transformation with far-reaching consequences. Before the twentieth century, most Americans rarely came into contact with police officers. But in a society dependent on cars, everyone—law-breaking and law-abiding alike—is subject to discretionary policing. Seo challenges prevailing interpretations of the Warren Court’s due process revolution and argues that the Supreme Court’s efforts to protect Americans did more to accommodate than limit police intervention. Policing the Open Road shows how the new procedures sanctioned discrimination by officers, and ultimately undermined the nation’s commitment to equal protection before the law. “With insights ranging from the joy of the open road to the indignities—and worse—of ‘driving while black,’ Sarah Seo makes the case that the ‘law of the car’ has eroded our rights to privacy and equal justice...Absorbing and so essential.” —Paul Butler, author of Chokehold “A fascinating examination of how the automobile reconfigured American life, not just in terms of suburbanization and infrastructure but with regard to deeply ingrained notions of freedom and personal identity.” —Hua Hsu, New Yorker
