998 resultados para 25TH APRIL 1974
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The measurement of pavement roughness has been the concern of highway engineers for more than 70 years. This roughness is referred to as "riding quality" by the traveling public. Pavement roughness evaluating devices have attempted to place either a graphical or numerical value on the public's riding comfort or discomfort. Early graphical roughness recorders had many different designs. In 1900 an instrument called the "Viagraph" was developed by an Irish engineer.' The "Viagraph" consisted of a twelve foot board with graphical recorder drawn over the pavement. The "Profilometer" built in Illinois in 1922 was much more impressive. ' The instrument's recorder was mounted on a frame supported by 32 bicycle wheels mounted in tandem. Many other variations of profilometers with recorders were built but most were difficult to handle and could not secure uniformly reproducible results. The Bureau of Public Roads (BPR) Road Roughness Indicator b u i l t in 1941 is the most widely used numerical roughness recorder.' The BPR Road Roughness Indicator consists of a trailer unit with carefully selected springs, means of dampening, and balanced wheel.
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Vendor Ranking for letting reports from the Iowa Department of Transportation.
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Vendor Ranking for letting reports from the Iowa Department of Transportation.
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Report on a review of selected application controls over the Iowa Department of Transportation’s Payroll System for the period April 12, 2010 through June 30, 2010
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Report on a review of selected general and application controls for the Iowa Department of Education’s Electronic Access System for Iowa Education Records (EASIER) system for the period April 4 through May 10, 2011
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The Food Assistance Program provides nutrition assistance to people with low income. Food Assistance can help you buy nutritious foods for a better diet. Produced bye Iowa’s Food Assistance Program, Department of Human Services.
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The Food Assistance Program provides nutrition assistance to people with low income. Food Assistance can help you buy nutritious foods for a better diet. Produced bye Iowa’s Food Assistance Program, Department of Human Services.
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Heart to Heart is a publication on new heart disease and stroke information and other related topics by the Department of Public Health.
