MnDOT has successfully piloted a European knowledge retention method to preserve the expertise of retiring workers who are subject matter experts. The agency has produced interactive multimedia books that use graphics, video and written material to present valuable information on concrete pavements, asphalt pavements and steel bridges, learned over a person’s entire career, for use by future engineers.
Continue reading Knowledge Books Preserve Expertise of Retiring Workers
The benefits of Minnesota’s rural and small urban transit systems exceed the costs of services, according to a study sponsored by the Minnesota Department of Transportation (MnDOT). For every dollar spent to provide transit services in Greater Minnesota, benefits worth $2.51 are shared throughout the communities, according to the “Measuring the Economic Benefits of Rural and Small Urban Transit Services in Greater Minnesota” report.
Continue reading Study: Public Transit Benefits Exceed Costs in Rural and Small Urban AreasRoadside dynamic message signs with breakaway components handle wind-induced vibrations adequately for an almost 24-year fatigue life. Rural intersection conflict warning signs vibrate noticeably under wind forces and require design changes to resist fatigue damage.
These are the results of a new research study sponsored by the Minnesota Department of Transportation that investigated the effects of wind loading on roadside message and conflict warning signs.
Continue reading Wind Impact and Breakaway Performance of Roadside Message and Conflict Warning SignsA new guidebook published by the Minnesota Local Road Research Board offers a uniform approach and practical methods for selecting locations and the right treatment for uncontrolled pedestrian crosswalks in Minnesota.
Continue reading Selecting Uncontrolled Pedestrian Crosswalk Treatments
The five CTS councils are holding this special webinar to discuss how the COVID-19 pandemic is affecting traffic and transit networks in Minnesota. The webinar will feature representatives from Minnesota transportation agencies sharing what they’re seeing in the Twin Cities metro and statewide, presentations from University of Minnesota researchers, and time for an audience Q&A.
Continue reading Impacts of the COVID-19 Pandemic on Minnesota’s Traffic and Transit NetworksMnDOT construction projects require tons of hot mix asphalt each year, with over 188 road and bridge projects in the 2020 construction season alone.
Historically, plant mixed asphalt has been weighed, tracked and paid for with computer-generated paper tickets. Paper ticketing isn’t an ideal process for a variety of reasons—on-site ticket collection poses safety risks, tickets can be easily lost, and data must be tabulated manually, just to name a few.
Continue reading Asphalt Delivery Tracking Goes Digital with Some 2020 Construction ProjectsThis article was originally published in Catalyst, May 2020.
Many of us would never drive after drinking, but we’re not as hesitant about getting behind the wheel after being awake for too long or not getting enough sleep. It turns out that can be just as dangerous as driving while impaired by alcohol or drugs.
Continue reading Get Lots of Sleep—But Not Behind The WheelThis article was originally published in Catalyst, May 2020.
Waymo and Uber have started trials of shared autonomous vehicle (SAV) service in several US cities. Without the expense of drivers, autonomous service could one day make the cost of a ride so low that people choose SAVs for their daily transportation needs instead of owning a vehicle.
Continue reading Shared Autonomous Vehicles: Dispatch Model Optimizes ServiceCities and counties need affordable pavement preservation treatments, but preservation strategies are often geared towards higher-volume roads. The Minnesota Local Road Research Board has developed new guidance on five lower-cost treatments that is more applicable to local agencies and can be used to preserve pavements based on the type and severity of pavement distress.
Continue reading Pavement Preservation Techniques for Local AgenciesReinforced concrete bridges are built to handle heavy loads and routine traffic for 75 years or more. But bridges in climates like Minnesota’s are exposed to moisture and chlorides from road salts that may penetrate these structures and corrode the steel.
In a recently completed research project, funded by MnDOT and the Local Road Research Board, researchers studied a rural bridge built in 2017 near Elgin, MN, that used glass fiber–reinforced polymer (GFRP) rebar in the bridge deck. They found that GFRP performed well, proving sufficiently strong for use as an alternative to corrosion-susceptible steel rebar.
Continue reading GFRP Rebar Shows Promise for Use in Bridge Decks
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