The objective of this study is to assess horizontal drilling as an alternative to pilot tunneling in geological investigation prior to the design and construction of highway tunnels and to identify means to increase the penetration capability and accuracy and decrease the cost of horizontal drilling. This volume presents a model for estimating the
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The report describes the salient features of the SCOT (Simulation of Corridor Traffic) model and a successful calibration and validation. SCOT is a computer model that may be applied to an urban traffic corridor and will simulate vehicular traffic on freeways, including on and off ramps, and urban streets. Vehicles are treated microscopically on th
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The purpose of the three-phase study is to develop design and construction methodologies that will enable shales which have caused settlements and slope failure in highway embankments to be identified and used successfully in future construction. The purpose of Phase II was to develop (a) techniques for evaluating the stability of existing embankme
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This study was concerned with one solution to the problem of deterioration of bridge decks due to corrosion of reinforcing steel caused by chloride from deicing salts. Flushing of salts by application of water to the underside of the concrete and electrochemical removal of the chlorides were investigated. Flushing was found to be ineffective and wo
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Signalization of Diamond Interchanges; Rapid Measurement of Concrete Cover on Bridge Decks; Permanent Bridge Deck Repair; Sawdust as Lightweight Fill Material; Highway Design for Motor Vehicles—A Historical Review Part 3: The Interaction of the Drive, the Vehicle, and the Highway
The purpose of the three-phase study is to develop design and construction methodologies that will enable shales causing settlements and slope failure in highway embankments in the past to be identified and used successfully in future construction. During the first year's work (Phase I), state and federal agencies were contacted. Information obtain
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Through a coordinated effort between the Federal Highway Administration and Colorado State University a training course was developed to provide training in the practical application of the concepts of open channel flow, fluvial geomorphology, and river mechanics to the planning, location, design, construction, maintenance and operation of highways
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The document is intended to give highway agencies general guidelines toward a more comprehensive application of direct access controls to commercial properties on arterial highways. Volume II is a reference document containing detailed descriptions of the design, application, cost, operational effectiveness, and cost-effectiveness of each access co
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The document is intended to give highway agencies general guidelines toward a more comprehensive application of direct access controls to commercial properties on arterial highways. Volume I discusses the basic problem dimension, summarizes the evaluation of the 70 identified techniques, and gives a general decision framework for implementation of
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This paper attempts to illustrate a current dilemma with respect to highway capital investment: while current investment in highways is maintaining a relatively high dollar volume, inflation has significantly eroded its effectiveness. Thus, in terms of constant dollars, all units of government are expending a decreasing amount for improvements. Thi
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The Federal Highway Administration of the u.s. Department ofTransportation is concerned with the loss of life, injury, andproperty damage that result from front tire failure on heavydutytrucks. The Bureau of Motor Carrier Safety contractedwith Ultrasystems, Inc., the Dynamic Science Division (ContractNo. DOT-FH-11-8562), to conduct an inve~tigation
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A survey was made of present municipal incineration practices in the United States and other countries. Previous world-wide research and development work on the use of incinerator residues as highway material is summarized. The types, quantities, and locations of municipal incinerator residues produced in this country were determined. The predomina
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Volume change resulting from moisture variations in expansive soil subgrades is estimated to cause damage to streets and highways in excess of $1.1 billion annually in the United States. Expansive soils are so extensive that rerouting highways to avoid the material is virtually impossible. This report presents the results of a review of current lit
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Raised Pavement Markers as a Traffic Control Measure at Lane Drops; Development of Asphalt Tests and Specifications in the United States; Noise Produced by Open-Graded Asphaltic Friction Courses; Single-Vehicle Accidents Involving Utility Poles
This report is the fourth of four volumes reporting the results of a project to analyze the nationwide magnitude of the urban railroad relocation and to prepare methodology for future relocation studies. Volume 1 is an executive summary; Volume 2 is a community guide for preliminary assessment of the potential for planning to alleviate urban railro
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