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This preliminary investigation focused on gathering information related to two main areas: calculating pavement damage and secondary impacts due to large vehicle traffic; and policy options for local governments to recapture the costs of roadway maintenance caused by wind farm development.

Members of the Local Road Research Board are seeking basic data about the oversize/overweight (OSOW) permit fee policies of counties in Minnesota and in other states. To gather this information, a brief online survey was distributed to members of the Minnesota County Engineers Association and the National Association of County Engineers. Additional information about agency practices was acquired through follow-up research and contacts to selected survey respondents. This Transportation Research Synthesis presents results of the online survey and the limited follow-up investigation.

The Minnesota Local Road Research Board (LRRB) is interested in increasing the awareness of cities and counties as to the importance of asset management and providing guidance to them about best practices for developing asset management plans, systems and software. The purpose of this Transportation Research Synthesis was to support this effort by conducting a literature review, consulting with national practitioners and interviewing representatives at local agencies about their practices.

The purpose of this Transportation Research Synthesis (TRS) is to provide an overview about the use of recycled materials in the base layers of pavements, and the design of these layers when using recycled materials. While the primary focus is on local streets and county roads, attention was also given to pavements constructed by state highway agencies.

The purpose of this research was to establish the scope of social media use by local governments for transportation purposes throughout the state of Minnesota.

The six technologies addressed in this synthesis are: 1. Geosynthetic-Reinforced Soil (GRS) Abutments – Rock County; 2. Precast Inverted Tee Slab Span Bridges – Scott and Chisago County; 3. Precast Box Beams and Sheet Pile Abutments – Blue Earth County; 4. MSE Wall with Single Line Pile Abutment – Steele County; 5. Crash Tested Open Metal Railing – Polk County; and 6. Large Precast Box Culverts – Aitkin County, and Three-Sided Structures – Multiple Locations.

This report examines traffic counting practices on local roads from five perspectives: 1. Current MnDOT traffic counting practices; 2. Traffic counting technologies appropriate for temporary deployment; 3. Literature review of traffic counting practices on local roads; 4. Surveys of statewide participants in MnDOT's traffic data collection program (initial and supplemental surveys); and 5. Survey of state DOTs' local road traffic data collection practices.

This Technical Summary pertains to the LRRB-produced Report 2015-12, “Transportation Investment and Economic Development in Minnesota Counties,” published April 2015.

This Technical Summary pertains to the LRRB-produced Report 2014-17, “Building Local Agency Capacity for Public Engagement in Local Road Systems Planning and Decision Making,” published May 2014.