A search has been made for road deicing chemicals to replace sodium chloride (NaCl). The impetus for this search stems from the numerous drawbacks associated with the prevalent use of NaCl as a road deicer. All types of chemical compounds were reviewed. Selections were made on the basis of criteria such as water solubility and freezing point loweri
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This manual presents example studies and reports which implement the philosophy that the total stream crossing including the approach fills in the flood plains and all necessary waterway openings should be designed and constructed for the least total expected cost to the public. The total expected cost includes the capital investment in the highway
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The Development of Improved Parking Signs; Determination of the In Situ Permeability of Bases and Subbases; The Seventh Annual FCP Conference; The Frost Action Problem—An Overview of Research to Provide Solutions; Development and Testing of Advanced Control Strategies in the Urban Traffic Control System
Historically, rehabilitation of aged flexible pavements in the state of Florida has involved the placement of a leveling course and some form of asphalt overlay. In many cases, these improvements have also included removal of all or a portion of the existing pavement in order to preserve existing drainage facilities and height clearances. More rece
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This report describes the hydraulic tests conducted on slotted drain inlets. Tests were conducted to study the effect of individual parameters on the efficiency of slotted drains. Test results and design procedures are presented for 1.75 in. (44.45 mm) wide slots with solid vertical transverse spacers at 6 in. (152.4 mm) spacing, installed 3.5 in.
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This report summarizes methods used and results obtained from a four-state, Iowa, Kansas, Nebraska and South Dakota cooperative value engineering study of portland cement concrete pavement joint repair. The study was initiated under the sponsorship of the Federal Highway Administration to provide an opportunity for the four participating states to
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Included in this manual is a compilation of sound research techniques that can be used by the engineer/analyst to carry out research related to highway accidents. Because highway engineering administrators must daily decide how best to spend limited numbers of safety dollars, they need to have results from properly conducted and clearly presented a
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The research was conducted to develop a cost-effectiveness model for guardrail selection that includes cost parameters for eleven (11) guardrail configurations and criteria for analysis of system effectiveness under various dynamic impact conditions. This volume is a user's manual for applying the cost-effectiveness computer programs for (1) select
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