Soil Stabilization with Lime Fly Ash, Iowa Highway Research Board Bulletin No. 26, 1961

The sixth in a series, this bulletin further compiles the reports on completed research done for the Iowa State Highway Research Board under its Project HR-1, The loess and glacial till materials of Iowa; an investigation of their physical and chemical properties and techniques for processing them to increase their all-weather stability for road construction. The research, started in 1950, has been conducted by the Iowa Engineering Experiment Station at Iowa State University under its Project 283-S.

Methods for Testing Engineering Soils, Iowa Highway Research Board Bulletin no. 21, 1960

This bulletin is a further compilation of the reports on completed research done for the Iowa State Highway Research Board Project HR-1 The loess and glacial till materials of Iowa; an investigation of their physical and chemical properties and techniques for processing them to increase their all-weather stability for road construction. The research, started in 1950, was done by the Iowa Engineering Experiment Station at Iowa State University under its project 283-S. The project was supported by funds from the Iowa State Highway Commission.

Soil Stabilization with Cement, Iowa Highway Research Board Bulletin No. 23, 1961

This is the fourth publication in a series of compilations of the reports on research completed for the Iowa State Highway Commission. This research was done for the Iowa State Highway Research Board Project HR-1. The Loess and Glacial Till Materials of Iowa; an Investigation of Their Physical and Chemical Properties and Techniques for Processing Them to Increase Their All-Weather Stability for Road Construction. The research, started in 1950, was done by the Iowa Engineering Experiment Station under its project 283-S. The project was supported by funds from the Iowa State Highway Commission.

Soil Stabilization with Lime, Iowa Highway Research Board Bulletin No. 25, 1961

This is the fifth publication in a series of compilations of the reports on research completed for the Iowa State Highway Commission. This research was done for the Iowa State Highway Research Board Project HR-1, "The Loess and Glacial Till Materials of Iowa; an Investigation of Their Physical and Chemical Properties and Techniques for Processing Them to Increase Their All-Weather Stability for Road Construction." The research, started in 1950, was done by the Iowa Engineering Experiment Station under its project 283-S. The project was supported by funds from the Iowa State Highway Commission. The principal objectives of the project may be summed up as follows: 1. To determine by means of both field and laboratory studies the areal and stratigraphic variation in the physical and chemical properties of the loess and glacial till materials of Iowa. 2. To develop new equipment and methods for evaluating physical and chemical properties of soil where needed. 3. To correlate fundamental soil properties with the performance of soils in the highway structure. 4. To develop a scientific approach to the problem of soil stabilization based on the relationships between the properties of the soils and those of the admixtures. 5. To determine the manner in which the loess and glacial till materials of Iowa can be processed for optimum performance as highway embankments, sub-grades, base courses, and surface courses.

U.S. Highway 20 Corridor Development Study, Task A Report, 1992

This Task A Report summarizes the initial activities of the U.S. 20 Corridor Development Study. Task A constitutes a review of the portion of existing U.S. 20 from the Nebraska state line on the south side of Sioux City to the junction with U.S. 169 south of Ft. Dodge. · Preliminary study findings for this 119 mile corridor are summarized below.

U.S. Highway 20 Corridor Development Study, Report B: Improvement Alternatives, Costs and Traffic, 1992

In February the U.S. 20 Corridor Development Study's Steering Committee met to review Report A. At that meeting the Committee selected seven alternatives to be evaluated from a cost and traffic perspective. This report, Report B, presents the cost and traffic evaluation of these seven alternatives. This Report B and its cost and traffic estimates will be reviewed at the next Steering Committee meeting. At that time it is possible that, based on the traffic and cost estimates, one or more of the alternatives will be eliminated from further consideration. After that meeting the Consultant will initiate the more in-depth analyses, including the economic feasibility

U.S. Highway 20 Corridor Development Study, 1992

This study examines the feasibility of making a major financial investment in the improvement of U.S. 20 between Sioux City and Fort Dodge, Iowa. This 119-mile (191-km) highway segment of U.S. 20 currently includes 97 miles (156 km) of 2-lane highway and 22 miles (35 km) of 4-lane highway (on the west end near Sioux City and a short section near Holstein). This 119-mile (191-km) segment is predominantly rural in nature, and serves a region of Iowa that has not been economically prospering. Local business leaders and residents have long desired major improvements to this highway segment, not only because of the safety and travel efficiency implications, but also because of the belief that the highway, as mainly a two-lane facility, is retarding the corridor area's economic growth and well being. The study was divided into five sequential tasks: (A) Evaluation of Existing U.S. 20; (B) Improvement Alternatives, Costs and Traffic; (C) Screening of Alternative Candidate Improvements; (D) Economic Feasibility Analysis; and (E) Interpretation and Comparisons.

U.S. Highway 20 Corridor Development Study - Report C: Final Screening of Alternative Candidate Improvements, 1992

This report briefly compares the alternative improvement options using analyses conducted to date, and is intended to identify the alternatives which should be carried forward into the study's economic evaluation phase.

Iowa Highway Research Report No. 2, 1950-1951

During the fiscal year, July 1, 1950 to June 30, 1951, the Iowa State Highway Commission expanded its research program by adding to the work under way during the previous fiscal year, fifteen substantial projects recommended to the Commission by the Iowa Highway Research Board. The major portion of the projects under way in the previous fiscal year have been active in this fiscal year. All of the additional projects have gotten under way during this fiscal year. This year, as in the past, the work has been performed partly by Commission forces and partly by outside agencies such as the Institute of Hydraulic Research at Iowa City, the State University of Iowa, Iowa State College, the Iowa Geological Survey and the United States Geological Survey. The major portion of the fifteen new projects has been assigned to these outside agencies.

Clinton Multimodal (U. S. 30 Mississippi River Bridge) Study, 2003

The purpose of this memorandum is to document the benefit-cost analysis of the river crossing concept alternatives described in the "Concept Alternatives Technical Memo." Benefit-cost studies are designed to measure, in dollars, the potential positive or negative impacts of large-scale construction projects. The concept alternatives analyzed include improvements to the Union Pacific Railroad (UPRR) River Crossing and the U.S. Highway 30 (U.S. 30) River Crossing.

FY2010 Annual Report Research, Intelligent Transportation Systems, and Technology Transfer Activities, October 18, 2011

Transportation research makes a difference for Iowans and the nation. Implementation of cost effective research projects contributes to a transportation network that is safer, more efficient, and longer lasting. Working in cooperation with our partners from universities, industry, other states, and FHWA, as well as participation in the Transportation Research Board (TRB), provides benefits for every facet of the DOT. This allows us to serve our communities and the traveling public more effectively. Pooled fund projects allow leveraging of funds for higher returns on investments. In 2010, Iowa led fifteen active pooled fund studies, participated in twenty-two others, and was wrapping-up, reconciling, and closing out an additional 6 Iowa Led pooled fund studies. In addition, non-pooled fund SPR projects included approximately 20 continued, 9 new, and over a dozen reoccurring initiatives such as the technical transfer/training program. Additional research is managed and conducted by the Office of Traffic and Safety and other departments in the Iowa DOT.