Asphalt pavements with polymer-modified binders (PMBs) perform better than pavements with unmodified asphalt binders. While pavements with PMBs may cost more initially, performance is improved in the long run. In a recent study, researchers compared the performance and life cycle costs of modified and unmodified binders and found that modified binders are more cost-effective, even for local low-volume roads.
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Understanding Transit and Shared Mobility Preferences in Greater Minnesota Post-COVID
Public transit and shared mobility use sharply decreased during the pandemic. To remain viable, transit agencies and other transportation services in Greater Minnesota need to recover customers. A recent project identified rider preferences, safety measures and service improvements to increase interest in and use of alternative transportation.
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The Role of Gender and Identity in Travel Behavior
Ensuring the transportation system is accessible and welcoming to all demographics requires understanding how different genders interact with the transportation system. Insight gained from a new project into the impacts of gender and other identities on travel needs, challenges and experiences will aid MnDOT in advancing transportation equity.
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Assessment of GFRP-Reinforced Bridge Deck Performance
A nonmetallic alternative to the steel rebars that reinforce concrete bridge decks has the potential to be longer lasting and more cost-effective in keeping bridges maintained in Minnesota’s harsh climate. Initial studies show that the performance of bridge decks built with glass fiber-reinforced polymer (GFRP) is comparable to—if not better than—conventionally built decks.
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Exploring a State-Tribal Partnership to Advance Energy Goals
MnDOT has a unique opportunity to make progress toward its renewable energy goals and enhance the government-to-government relationship with the Red Lake Nation. Initial analyses of an innovative energy partnership indicate potential mutual and multiple benefits for MnDOT and the tribe.
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Enhancing Pedestrian Experiences at Roundabouts
While roundabouts improve traffic efficiency and reduce accidents, pedestrian safety concerns linger. A study of driver–pedestrian interactions at roundabouts produced guidance for local agencies to increase driver yielding and enhance the pedestrian experience.
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Using Signal Phasing and Timing Data to Reduce Fuel Use
Fuel consumption increases when vehicles stop and start at traffic signals. Transmitting traffic signal data to connected vehicles could control vehicles’ driving speed and limit unnecessary stopping and starting, potentially lowering fossil fuel use. A recent study looked at the benefits and costs of deploying more signal messaging technology to inform future infrastructure investments.
Continue reading Using Signal Phasing and Timing Data to Reduce Fuel UseGuidance to Help Local Agencies Address Deferred Maintenance
Local government budgets are continually inadequate to meet increasing transportation maintenance needs. In a recent study, researchers analyzed maintenance investment decision-making in local governments across Minnesota, identifying the fiscal conditions that impact road repair spending, recommending steps to close maintenance funding gaps and providing context to inform communications with decision-makers.
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Commodity Flow Data for Freight Network Infrastructure Planning
Minnesota’s economy depends on efficient freight movement across the state. To ensure that infrastructure can accommodate cargo transport by all modes, MnDOT needs commodity flow data to plan improvements and minimize supply chain disruptions. An analysis of existing resources and needs will support new tools to optimize investments in freight transport.
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Comparing Additives Used in Stabilized Full-Depth Reclamation
Beltrami and Hubbard counties planned pavement rehabilitation on a shared road, presenting a unique opportunity to directly compare two stabilizers: engineered emulsion and Base One, a proprietary mix. While there were some variations in performance and cost, both met design values for pavement strength.
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