Campaign: Bridge and Structures

Detect nondocumented pile length of sign structures and highmast poles

MnDOT districts have concerns of the pile capacity for some sign structures and high mast poles due to undocumented details of underground piles used. This has caused safety concerns as these structures may fail. As an engineering solution, some districts have adopted the dynamic pile testing methods for detection of actual pile length used, which uses an impact hammer for vibration excitation and a geophone for signal ...more »

Submitted by (@ndsumijia)

Idea Submitted by : Mijia Yang

List your MnDOT Office,District,City, County, Univ. or Other : North Dakota State University

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp

Why is this a priority and what are the benefits for the State/County/City? :

Several safety issues have been reported with respect to these sign structures and high mast poles in Duluth regions. The success of this project will ensure the uninterrupted service of these undocumented sign structures and high mast poles.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Bridge and Structures

Service Life and Performance Assessment of Bridge Decks with Corrosion-Resistant Reinforcement

MnDOT is in the initial phases of designing and constructing a pair of side-by-side bridges on I-35, one with GFRP and the other with conventional steel deck reinforcement. Because these two bridges will be exposed to the same environmental conditions, very similar traffic, and will be constructed within the same timeframe, a unique opportunity exists to identify and evaluate differences in performance between them. Thus, ...more »

Submitted by (@behrouz.shafei)

Idea Submitted by : Behrouz Shafei and Brent Phares

List your MnDOT Office,District,City, County, Univ. or Other : Iowa State University

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp

Why is this a priority and what are the benefits for the State/County/City? :

Degradation of bridge decks is mainly due to the corrosion of steel reinforcing bars embedded in the deck concrete. Considering the significant time and labor investment needed to repair or replace bridge decks prior to the end of their design service life, the outcome of this project is expected to be an important step forward to implement non-conventional, corrosion-resistant reinforcement, which will improve the durability and performance of bridges, while reducing direct maintenance costs. This will also minimize the indirect costs originated from bridge closure, disruption in traffic, and impact on surrounding environment.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Bridge and Structures

Review of Past MnDOT Barrier Types

Many Minnesota bridges have older barriers or parapets that met the design code at the time of original construction but no longer meet current standards. Document the use of post & beam, type G, type J, and type F barriers on MnDOT bridges. How many years was each used? How many bridges have each type? What is the capacity of each barrier type? Develop guidance and criteria for determining when an existing barrier ...more »

Submitted by (@paul.rowekamp)

Idea Submitted by : MnDOT Bridge Office

List your MnDOT Office,District,City, County, Univ. or Other : MnDOT Bridge Office

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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Campaign: Bridge and Structures

Use of plastic extrusions to control cracking in concrete barriers

MnDOT has experimented with the use of plastic strips inserted into bridge barrier faces to form crack control joints in parapets and barriers. How are these performing compared to a similar control group?

Submitted by (@paul.rowekamp)

Idea Submitted by : Bridge Office

List your MnDOT Office,District,City, County, Univ. or Other : MnDOT Bridge Office

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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Campaign: Bridge and Structures

Development of portable devices via rapid image analysis for assessment of sign structures

Sign structures, including overhead signs, high mast light towers and tall traffic signs, play crucial roles in traffic control and the safety enhancement of traveling public. These sign structures, due to high slenderness ratio, are vulnerable to wind-induced fatigue and fracture damage. Therefore, successfully collecting performance data of these sign structures, assessing their conditions and timely maintenance are ...more »

Submitted by (@zhibin)

Idea Submitted by : Drs. Zhibin Lin, Mijia Yang, Jinui Wang and Na Gong

List your MnDOT Office,District,City, County, Univ. or Other : North Dakota State University

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp, Jihshya Lin

Why is this a priority and what are the benefits for the State/County/City? :

The proposed technology will address the critical need for effective and rapid methods for timely assessment of sign structures in Minnesota State, and introduce an efficient tool for MnDOT that reduces cost (with eliminated traffic control), man hours and human risk (without climbing high power lines or working alongside traffic). The end products are feasible for customization and optimization, either using the images by integrating commercially available handheld/vehicle-mounted/UAV-mounted video recorders, or being customized as a compacted unit.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Bridge and Structures

Using I-35W Bridge Vibration Monitoring Response to Understand the Impact of Environmental Effects

The project would identify the impact of environmental effects (temperature and humidity) on natural frequency and mode shapes. The previous study on the feasibility of vibration-based monitoring highlighted the variation of natural frequency as a function of temperature and season; however, the variation was not consistent among mode shapes. In particular, the variation is not linear with temperature and not monotonic ...more »

Submitted by (@llinderm)

Idea Submitted by : Lauren Linderman and Carol Shield

List your MnDOT Office,District,City, County, Univ. or Other : University of Minnesota; Department of Civil, Environmental, and Geo-Engineering

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp

Why is this a priority and what are the benefits for the State/County/City? :

The project would leverage the investment in the I-35W St. Anthony Fall’s Bridge monitoring and previous vibration signature results to understand the impact of environmental factors on natural frequency. Minnesota bridges experience some of the largest daily and yearly temperature changes and gradients throughout the United States, making bridge monitoring in Minnesota more challenging than in many other states. The results from the proposed project could be expanded to the long-term monitoring of bridges throughout Minnesota. 


Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Bridge and Structures

Use of Ground Penetrating Radar Technology for Critical Civil Infrastructure Assessment and Manageme

The research hypothesis is that the ground penetrating radar technology, in combination with other established/emerging NDE technologies (Tetrahertz [THz] imaging, Step Frequency Radar [SFR], Falling Weight Deflectometer [FWD], etc.) could be used to create fused data and visualizations in the context of critical civil infrastructure assessment and management.

Submitted by (@djeisen)

Idea Submitted by : Dr. David Eisenmann

List your MnDOT Office,District,City, County, Univ. or Other : Iowa State University

Idea Champion - Who at MnDOT/LRRB? : Paul Rowkamp

Why is this a priority and what are the benefits for the State/County/City? :

It is anticipated that the proposed study will provide significant insights into the use of GPR-based hybrid/multi sensing technologies for advanced and rapid critical infrastructure assessment and management. Specific recommendations from this work will provide guidance on extending the technology to other similar areas such as railroad inspection, airport pavement evaluation, etc.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : -- Please Choose --

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Campaign: Bridge and Structures

Low-Cost Portable Device for Welding Quality Monitoring

Welding is commonly used for connecting metal components in these bridges during fabrication and/or construction. Welding processes require high heating input while various factors, such as shrinkage of weld/parent metal or overheating of joint, vulnerably lead to cracks and other defects on the surface. These defects not only could result in severe cracks and corrosion, but also may ultimately lead to malfunction and ...more »

Submitted by (@zhibin)

Idea Submitted by : Drs. Zhibin Lin, Mijia Wang, Jinhui Wang and Na Gong

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp, Jihshya Lin

Why is this a priority and what are the benefits for the State/County/City? :

The proposed technology will address the need for an effective and rapid method for timely welding inspection and maintenance of steel bridges in Minnesota State, and introduce an efficient tool for MnDOT that reduces cost, man hours and human risk. Furthermore, the end product may provide practical tools for steel bridge fabricators, construction and in-service welding inspectors, local and state bridge owners in MnDOT to assist in identifying welding quality in critical locations to meet their needs and to assist in decision making.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Bridge and Structures

Synthesis regarding performance of slipformed barriers and parapets

MnDOT has allowed contractors to use the slipform method of barrier and parapet construction for many years with seemingly good long performance. However, some other surrounding states prohibit the use of slipformed barriers and parapets due to some performance issues, such as local cracks. Water accumulated inside the cracks can cause potential chloride corrosion to the barrier reinforcement. There is also a concern ...more »

Submitted by (@anchen)

Idea Submitted by : An Chen

List your MnDOT Office,District,City, County, Univ. or Other : Iowa State University

Idea Champion - Who at MnDOT/LRRB? : Paul Rowekamp

Why is this a priority and what are the benefits for the State/County/City? :

Barriers and parapets are typically replaced at the same time as the replacement of bridge deck. Premature cracking and failure of the barriers and parapets may require their replacement before the replacement of bridge deck, which incurs additional cost. In addition, barriers and parapets are a critical part of roadway safety. Damaged barriers and parapets can cause safety issue. This study can eliminate potential problems and improve the long-term performance of slipformed barriers and parapets in Minnesota. It has several benefits, including cost savings, increased safety and durability of these structures.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Environment

Using compost containing source separated organic material to reduce runoff at MnDOT sites

Minnesota Statute 115A.551 calls for reaching a 50% recycling rate in the metro area and 35% in greater Minnesota. In the Twin Cities Metro Area, organics recovery is currently between 3 and 6%, with a goal of 9-15% by 2030. Source separated organic material is separated from other wastes at the source, rather than at mixed municipal solid waste transfer stations. Source separated organic material is generally transferred ...more »

Submitted by (@cpoland)

Idea Submitted by : Steven Loheide, PhD, and Corey Poland

List your MnDOT Office,District,City, County, Univ. or Other : University of Wisconsin, Madison, Department of Civil and Environmental Engineering

Idea Champion - Who at MnDOT/LRRB? : Dwayne Stenlund (MnDOT)

Why is this a priority and what are the benefits for the State/County/City? :

MnDOT could realize cost savings, acquiring SSOC directly from compost facility operators. Compost has been shown to be more effective than traditional BMPs such as hydroseed in soil stabilization, runoff/solids/nutrients/metals loading, and vegetation establishment. Furthermore, composting presents a closed loop process, which helps actualize MnDOT’s goals of becoming more sustainable.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Environment

Vegetation management practices to increase and enhance roadside pollinator and wildlife habitat

Migratory pollinator species such as Monarch butterflies and other wildlife are at risk due to the loss of native habitats from increasing development, intensive agricultural practices, and greater use of pesticides. Roadside habitats, in particular, have grown in importance, especially as migratory corridors and places that aid in species dispersal and mixing. We’d like to identify cost-effective roadside vegetation ...more »

Submitted by (@lrrbmetrofocusgroup)

Idea Submitted by : Metro LRRB Focus Group

Idea Champion - Who at MnDOT/LRRB? : Dan MacSwain - Washington County

Why is this a priority and what are the benefits for the State/County/City? :

• cost savings (reduced mowing costs)

• stabilizing migratory pollinator populations

• development of priority migratory corridors

• better informed decision makers

• possible large-scale implementation (for operators, supervisors)

• increased safety (for pollinators and people)

• project prioritization

• case studies

• design of practices

• types of practices

• increased pollinator services

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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Campaign: Maintenance Operations

Salt Reduction Research - Chloride Capture

MnDOT District One uses on average 40,000 tons of salt per year. To create a visual, this equates to over 1,000 semi loads of material or which would stretch over 20 miles if parked end to end. One table spoon of salt will contaminate 5 gallons of fresh water. Since Northeastern Minnesota is near one of the largest bodies of fresh water in the world, Lake Superior, we should be concerned about reducing the long term potential ...more »

Submitted by (@duane.hill)

Idea Submitted by : Duane Hill

List your MnDOT Office,District,City, County, Univ. or Other : District 1

Idea Champion - Who at MnDOT/LRRB? : Duane Hill

Why is this a priority and what are the benefits for the State/County/City? :

MnDOT is committed to being a leader in finding ways to reduce the amount of chloride entering the environment while still providing safe winter driving road conditions for Minnesota. The benefit will be long-term sustainability of our economy and natural water resources.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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