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Much is still unknown about multimodal travel: • Travelers switch modes more frequently; how can multimodal trips be better understood and modeled? • How are people mixing or substituting other modes for what would have been transit trips in the past, or combining other modes with transit? Instead of transit, or with transit? What about using transit one way and another mode (bike, car2go, etc.) the other way? • What ...more »
MnDOT provided considerable funding for A line and there are quite a few additional arterial BRT routes being considered along portions of state highways. “After” information for A line is needed, and currently there does not seem to be anything in the works by other agencies. Metro Transit is planning to create several more BRT lines in the coming years, so any research that can inform the planning and design of those ...more »
There are few studies on the subject of stop lines (also known as advance stop lines, stop bars, or advance stop bars) and their effect on driver behavior, specifically at stop-sign-controlled intersections. Currently, searches on Google Scholar and the University of Minnesota catalog reveal studies from Retting and Van Houten and Berger; these studies are 16 and 41 years old, respectively, and only consider moving pre-existing ...more »
Modern roundabouts are a popular option for traffic control in Minnesota because of their proven safety and efficiency. However, there is concern about the safety of non-motorized users when traveling through or across roundabouts. Further investigation is needed on the actual vs. perceived safety of non-motorized users at a modern roundabout; helping to define the safety needs to focus the educational message and approach. ...more »
Connected vehicle technologies, such as vehicle-to-infrastructure (V2I) and vehicle-to-vehicle (V2V), will potentially transform the way people travel and improve the nation’s transportation system in terms of safety, mobility, and the environment. Much work in this area is underway nationally that could be synthesized and handed down locally. Local road agencies would also like to take advantage of this technology as ...more »
The transportation industry is facing a severe and growing workforce shortage. Not enough new workers are entering the field, and retaining current workers is often challenging. It can be difficult for local agencies, especially in rural areas and small towns, to find the staff needed to deliver projects. The problem extends to consultants and the private sector. Research is needed to understand the causes of the shortage. ...more »
The impacts of chloride to our natural environment—lakes, wetlands, soils, and so on—are gaining increased attention. Chlorides are used in winter maintenance as part of anti-icing and deicing operations; in rural areas, chlorides are also applied for dust control on gravel roads. Currently, data is lacking about the impact of chlorides used in dust control; in most cases, chloride appears to soak into the gravel, but ...more »
Current MPCA stormwater regulations require the same treatment of impervious areas regardless of ADT/road volume. Stormwater contaminant data is available for urban areas but not for rural areas. Research is needed to quantify the contaminant level coming off paved roadways with different traffic volumes, in particular, for rural and low-volume roads. The data could be used to better match conditions to appropriate treatment ...more »
Many local agencies lack funding to construct and maintain all the bridges in their roadway network. One option to reduce costs is to reduce the number of bridges. For example, a local bonding program in Kansas requires a county to remove one bridge in order for it to obtain funds to replace another. In Minnesota, some township bridges are on very low-use roads that have alternative access for nearby residents, but local ...more »
There are many applications of GPS for snowplow and winter maintenance operations, from being more efficient with salt and sand to eliminating the need for manual time sheet entries for plow drivers. The purpose of this project is to identify the ways GPS is used in winter maintenance operations in cities and counties in Minnesota and beyond.
Several communities that have seal coated their pavement have experienced extremely early pavement stripping, creating a need to prematurely overlay all streets, a very big expensive deal. Is the stripping caused by seal coating? What are the negative effects of seal coating? Is it mix design, timing, or something else?
It’s known that routing and sealing is effective as a crack sealing technique. However, it is very time-consuming compared to traditional crack sealing. Research on the relative costs and effectiveness of the two techniques is needed. If you can get 90% similar performance, is the less expensive technique the better option? Include sealing on lip and curb. Also, what is the cost-effectiveness of keeping water out of the ...more »