Connections, January 2004

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Public Transit.

Connections, May 2004

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Public Transit.

2003-2007 Iowa Transportation Improvement Program

This document provides the planned investments in Iowa's transportation system for the five-year period of 2003-2007. It encompasses aviation, railroads, rivers, trails, state parks and institutional roads, roadways, and public transit.

Connections, September 2004

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Public Transit.

Connections, January 2005

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Public Transit.

Connections, May 2005

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Public Transit.

Iowa Commuting Patterns, 2000

A century ago, the majority of workers were employed near their homes—on farms or in cities and towns. As industrialization increased and suburbs surrounded central cities, commuting meant going from homes in suburbs to jobs in cities. Today, there is a growing trend of workers commuting between suburbs. On any given day, 61,775 workers commute to jobs in Iowa counties other than the one in which they live. The most important reason for increased commuting has been employment growth. Rising incomes and the growth of suburbs have also been factors. In the past, the increased employment of women added to the number of commuters. Commuting patterns are a key consideration in transportation planning. In more urban states than Iowa, there is concern that the use of mass transit continues to decline. In Iowa, where so much of our commuting is between counties, private vehicles are often the only practical means of getting to and from work. On any given day, 1,155,008 single-occupancy vehicles are driven to and from jobs somewhere in Iowa. At the same time, an additional158,699 workers share rides by participating in carpools.

Connections, September 2005

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Public Transit.

Stringless Portland Cement Concrete Paving, February 2004

This report describes results from a study evaluating the use of stringless paving using a combination of global positioning and laser technologies. CMI and Geologic Computer Systems developed this technology and successfully implemented it on construction earthmoving and grading projects. Concrete paving is a new area for considering this technology. Fred Carlson Co. agreed to test the stringless paving technology on two challenging concrete paving projects located in Washington County, Iowa. The evaluation was conducted on two paving projects in Washington County, Iowa, during the summer of 2003. The research team from Iowa State University monitored the guidance and elevation conformance to the original design. They employed a combination of physical depth checks, surface location and elevation surveys, concrete yield checks, and physical survey of the control stakes and string line elevations. A final check on profile of the pavement surface was accomplished by the use of the Iowa Department of Transportation Light Weight Surface Analyzer (LISA). Due to the speed of paving and the rapid changes in terrain, the laser technology was abandoned for this project. Total control of the guidance and elevation controls on the slip-form paver were moved from string line to global positioning systems (GPS). The evaluation was a success, and the results indicate that GPS control is feasible and approaching the desired goals of guidance and profile control with the use of three dimensional design models. Further enhancements are needed in the physical features of the slipform paver oil system controls and in the computer program for controlling elevation.

Connections, September 2002

Newsletter for Iowa Department of Transportation, Office of Public Transit

Connections, Fall 2001

Newsletter for Iowa Department of Transportation, Office of Public Transit

Connections, Winter 2001-2002

Newsletter for Iowa Department of Transportation, Office of Public Transit

Connections, Spring 2001

Newsletter for Iowa Department of Transportation, Office of Public Transit

Connections, Summer 2001

Newsletter for Iowa Department of Transportation, Office of Public Transit

2006-2010 Iowa Transportation Improvement Program

This document provides the planned investments in Iowa's transportation system for the five-year period of 2006-2010. It encompasses aviation, railroads, rivers, trails, state parks and institutional roads, roadways, and public transit.