Airport Safety Zoning is required by statute (Chapter 360) in Minnesota for the safety of people on the ground and in the air by preventing incompatible development around airports. Despite this requirement, by one measure only about 50% of the state's airport communities have enacted ordinances that are fully compliant with Minnesota's somewhat stringent airport zoning standards as articulated in Minnesota Administrative... more »
Ramsey County has recently noticed rapid deterioration of some of its bituminous pavements that are in the second half of their life cycle or near the end of their life cycle. In the spring of 2018, maintenance staff noticed significant raveling and stripping of pavements wear course surface on McKnight Road. The entire roadway surface in specific locations deteriorated to the binder course of the pavement section.... more »
There is a need to quantitively assess the permeability of aggregate materials both for design and during construction when materials do not meet specification. A simple tool to assess permeability based upon gradation, coarse crushing percentage, fine aggregate angularity, and material type would uses in both design requirements and materials acceptance.
With higher traffic volumes and greater restrictions on placing road tubes to do vehicle classification counts we need to find alternate ways to get vehicle class data. A new technology is being implemented at the California Department of Transportation that uses existing loops to obtain vehicle signatures to classify vehicles. The loop signature technology could be a huge innovation that can replace existing data collection... more »
Currently there is no research that identifies the answer to the simple question: what is the return on investment for a weigh station, a weigh in motion system, a weigh scale, a virtual enforcement site, a pull off or weight and safety enforcement operations in general? At this point government partners understand the need for weight enforcement to ensure that trucks aren't wearing done roads and safety enforcement... more »
Ridesharing and vehicle manufacturers are increasingly moving towards autonomous mobility-on-demand (AMOD) to provide automated vehicle service to travelers. AMOD acts essentially like a point-to-point taxi or ridesharing service, except that vehicles are automated which greatly reduces ridership costs. Due to the lack of a driver, the remaining costs of vehicle purchase, operational costs (e.g. fuel), and maintenance... more »
Expand research started by University of Minnesota Twin Cities campus Remote Sensing Lab to automatically extract footprints of buildings, roadway edges, and other features from aerial imagery (photography) and laser generated point clouds, that currently require a manual identification and interaction during photogrammetric mapping.
MnDOT has received complaints form motorcyclists, bicyclists, and pedestrians that large pavement markings are slippery. This study would look at the skid resistance of large pavement markings such as crosswalk blocks, turn arrows, and bike lanes. Are the pavement markings truly slippery? How does the skid resistance of pavement markings compare to the surrounding pavement? Is there a need to change our practices?
The National Highway Traffic Safety Administration Report  indicated that pedestrians account for 16% of the fatalities in traffic accidents on US roadways during 2017. Pedestrian fatalities in urban areas increased by 46% since 2008. The 2017 traffic safety facts indicated that the proportion of people killed "outside the vehicle" (pedestrians, cyclists, motorcyclists, and other non-occupants) increased from a low... more »
Develop and deliver training on the new Minnesota Guide for Stream Connectivity and Aquatic Organism Passage through Culverts. The guide covers the following topics: Site Assessment, Hydraulic Analysis and Tools, and AOP Design methods. Anticipated audience includes surveyors, culvert designers, project managers, environmental coordinators, and highway designers. Delivery method is anticipated to be a combination of... more »
A new field moisture measurement device would be built based on prior research, trialed on construction projects, and a draft test standard developed. This new field moisture device would provide a fast and accurate method to determine the optimum moisture for compacting soils without laboratory Proctor testing or the use of a sand cone or nuclear density gauge. This new field test would determine if the construction... more »
The first phase would summarize the current performance of roadways already built using tire derived aggregate (TDA). There are varying experiences from successful installations across the region and country regarding how much material is required to successfully surcharge the TDA before the embankment can be successfully surfaced. After completion of phase 1, phase 2 would be done if test sections are needed. This... more »
Aggregates comprise about 95% of hot mix asphalt (HMA), by weight. Some aggregates are more susceptible to microwave heating than others, based on their component minerals. For example, Mesabi aggregate rock generated by Minnesota's taconite industry contains magnetite, which is an excellent microwave absorber. Conversely, other aggregate rock types like granite do not absorb microwave energy as well because they contain... more »
Marmac is a flexible pipe coupling material that allow for differential settlement of dissimilar pipe materials.
Compacted soil causes poor turf establishment, low water infiltration rates, and increased short term erosion. Tillage Radishes are a cover crop that germinate and establish rapidly, have a long tap root, winter kill, and decompose rapidly. They return the soil nutrient to the soil and provide drainage paths through the soil as the root decomposes.