The MnDOT Library recently got a request for a copy of Minnesota Standard Specifications for Highway Construction from 1938. It might seem obscure, but the request was easy to fulfill because a digitized version of the manual was readily available in the newly launched MnDOT Digital Library.
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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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CTS Symposium Speakers Offered Ideas for Building Supply Chain Resilience
Article originally published in Catalyst, February 6, 2023.
Supply chains aren’t normally at the top of the news, but pandemic-related disruptions and empty shelves have put them there. What does the future hold for freight and supply chain resilience? Speakers at the 25th Annual Freight and Logistics Symposium reviewed recent challenges and discussed how to make supply chains more cooperative, connected, and resilient.
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Exploring Region-Specific Roadside Turfgrass Varieties
Local agencies need cost-effective and durable turfgrass seed mixes to ensure grass coverage remains optimal along roadsides. In a recent study, researchers analyzed the performance of grass seed mixtures and planting costs, recommended region-specific mixes and developed a cost estimation tool for local agencies to be confident in their roadside vegetation choices.
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Study of Alcohol Overservice Finds Lack of Enforcement
Originally published as Study of alcohol overservice finds a lack of enforcement—and opportunities to improve in Catalyst, February 2023.
Overservice—the act of serving alcohol to an obviously intoxicated person—contributes to motor vehicle crashes and violence, and it’s illegal in 48 out of 50 states. Still, U of M researchers say overservice tends to be understudied and underenforced.
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Findings Lay Groundwork for Shared Mobility Transit in Rural Minnesota
Originally published in Catalyst, February 13, 2023.
Public transit services are vital for community health and connectivity, yet the transit solutions found in urban areas—such as frequent bus service and light rail—don’t exist in rural areas. As a result, mobility may be limited in rural communities because of the high costs and low availability of affordable, reliable transportation options.
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Putting Research Into Practice: Fog Sealing Chip Sealed Roads Can Improve Performance
Applying a protective surface—or chip seal—to existing asphalt on relatively low-traffic roads is a pavement preservation method used by many transportation agencies. Yet despite its popularity, chip seals can cause various issues. Some agencies have found that applying a fog seal following a chip seal is a cost-effective strategy for improving asphalt performance and public satisfaction.
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Talking about Winter Road Maintenance
AASHTO’s SICOP Talks Winter Ops podcast tackles a variety of topics about winter road maintenance in four recent podcasts. Listen to conversations with experts and practitioners who have real-life experience maintaining roads under snow and ice.
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Effective Placement of High-Tension Cable Median Barriers
While cable median barriers have drastically reduced fatal and other serious crashes, the barrier’s distance from the road may impact its safety effectiveness. MnDOT has a new method to estimate the change in the frequency of crashes based on this distance, facilitating informed decisions about installing or moving cable median barriers.
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Wearable technology for highway worker’s safety
This article was originally posted on Catalyst, January 2023.
Wearable technology could improve work-zone safety, but are highway workers on board?
Despite ongoing safety efforts, highway maintenance and operations workers have dangerous jobs. According to the Federal Highway Administration, an average of 135 highway workers loses their lives each year because of traffic incursions and limited space for maneuvering. Wearable technology embedded in work gear offers the promise of preventing injuries and deaths—and is already being used successfully in other construction fields. The big question: Would highway workers accept this technology?
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Crossroads 