Marti, Michael M.

The MnDOT Bridge Office sought out information on best practices regarding the use of drainage systems on bridges. Minnesota regulations strongly discourage the discharge of runoff directly into waterways; however, bridge drainage systems can lead to accelerated deterioration in bridge elements. MnDOT requested a synthesis to gather information to assist them in future development of guidance on design, detailing, specifications, construction, and maintenance procedures for bridge needs, focusing specifically on agencies with similar northern climates to the greatest extent possible.

This manual describes the evaluation and design procedures for pavement rehabilitation. The evaluation emphasizes a number of variables or conditions that should be considered. This manual does not introduce any new technology. Thickness designs of new pavements require two primary variable: traffic and soil strength. Rehabilitation design requires several additional variables such as: pavement structure, condition and strength. Rehabilitation design can involve more alternatives than new design that deal with materials, equipment, disruption of traffic and work zone safety. This manual has been written as a working reference to help identify and classify the surface distress, explore the various rehabilitation alternatives, select an appropriate alternative and briefly describe the rehabilitation procedure. The manual provides standardized identification of distress types for both flexible and rigid pavements, calculation procedures for Equivalent Axle Loads, and a brief synopsis of the AASHTO thickness design procedure. This manual should be used by cities and counties as a reference in developing rehabilitation strategies

This report summarizes 16 years of projects and products of the Minnesota Local Road Research Board's (LRRB) Research Implementation Committee. The report includes a general overview of the LRRB's Research Implementation Committee (RIC) and also provides a summary of implementation products and projects that the RIC sponsored from the years 1980 to 1996. The report divides implementation products into three areas: research syntheses, Research Implementation Series (RIS), and videotapes. It also presents the following information on implementation projects: title, author, date summary, project number, and a description of implementation or current status.

This form letter was created as part of Report 2010RIC02, "Sign Retroreflectivity - A Minnesota Toolkit." It was created to be sent by other agencies as a follow-up to the County letter, to stress the importance of addressing FHWA requirements.

This form letter was created as part of Report 2010RIC02, "Sign Retroreflectivity - A Minnesota Toolkit." It is meant to be sent by County Engineers to small local agencies within their county, to notify them of requirements and resources.

This spreadsheet was created as part of Report 2010RIC02, " Sign Retroreflectivity - A Minnesota Toolkit." It contains blank versions of forms used in evaluating sign retroreflectivity.

This presentation was created to accompany Report 2016-34A, System Preservation Guide: A Planning Process for Local Government Management of Transportation Networks, published in 2016.

As a supplement to the rural mailboxes brochure, the following information was provided by the City of Eagan as an example to provide guidance for urban mailbox installation. The city developed the following documents to educate the city council and residents on the need for proper mailbox installation: - Standard Plate – Mail and Paper box installation guidelines - Memo to Mayor and City Councilmembers – Summary of need to standardize mailboxes to reduce damage due to winter maintenance. - Resident notice flyer – sent to residents with non-complying mailboxes notifying them of the need to modify their mailbox to avoid damage due to winter maintenance.

The use of lightweight fill is increasing in the state of Minnesota. This material is used to replace a heavier insitu soil so as to reduce the load burden on the subgrade. There may be several alternative materials to consider for any construction project; however, design engineers might not consider them because of a limited knowledge or unfamiliarity with them. Various materials have been used, but specific design guidelines are not available because this type of construction is still considered experimental. The current selection is generally based on local knowledge. Additional research is required to determine more specific design guidelines for each lightweight fill material. The Local Road Research Board (LRRB) has therefore requested this synthesis to determine what technology and materials are available for the appropriate use of lightweight fill material in road construction.

This report describes how Acidulated Soybean Oil Soapstock can be used to control dust on low-volume roads in Minnesota. It discusses the costs and benefits of doing so for both MnDOT and the environment.