[PDF] Traffic Trends Since 1970 eBook

Author : National Academies (U.S.). Committee for the Study of Traffic Safety Lessons from Benchmark Nations
Publisher : Transportation Research Board
Page : 262 pages
File Size : 46,78 MB
Release : 2011
Category : Business & Economics
ISBN : 0309160650

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The tool kit will vary among jurisdictions depending on basic legal constraints, community attitudes, road system and traffic characteristics, and resources. The Transportation Research Board (TRB) undertook a study to identify the sources of safety improvements in other countries. Researchers do not have a complete understanding of the underlying causes of long-term trends in crashes and fatalities. Differences among countries are in part attributable to factors other than government safety policies. To identify keys to success, the TRB study committee examined specific safety programs for which quantitative evaluations are available and relied on the observations of safety professionals with international experience. The committee's conclusions identify differences between U.S. and international practices that can account for some differences in outcomes. The committee recommendations, which are addressed to elected officials and to government safety administrators, identify actions needed in the United States to emulate the successes that other countries have achieved. The recommendations do not comprehensively address all aspects of traffic safety programs but rather address areas of practice that are highlighted by the international comparisons and for which credible evidence of effectiveness is available."--Pub. desc.

Author : Scott M. Festin
Publisher :
Page : 84 pages
File Size : 18,61 MB
Release : 1996
Category : Electronic government information
ISBN :

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This paper summarizes travel trends in the United States and five regional areas for the period 1970-1995. Travel is summarized at the annual, monthly, weekly, and daily time scales. Data sources for this study included the annual vehicle travel estimates included in the Table VM-2 from Highway Statistics and traffic count data from approximately 5,000 Automatic Traffic Recorder (ATR) sites nationwide. The nation was split into 5 regions, corresponding to the regional breakdown in Traffic Volume Trends. It was found that travel has grown at approximately 3% per year over the past 25 years. For recent years urban travel makes up more than 60% of the total travel in the United States. The urban travel growth rate is slowing while rural growth rate is increasing. This shift in growth rates is also occurring at the regional level. The daily distribution of travel shows that, since 1978, traffic distribution during the day has undergone significant changes. The early morning hours (12 midnight to 4:00 a.m.) have declined as a percentage of the total ADT. The peaks in the morning and in the afternoon are increasing as a percentage of the total and the shoulders are growing into the middle of the day. The share of travel occurring during daylight hours (between 5:00 a.m. and 6:00 p.m.) has been increasing since 1978, and accounts for over 80% of the travel during the day.