A significant number of school bus stop-arm violations occur every day throughout the country. In Minnesota, violation and citation data suggests these incidents are grossly underreported and under…| Crossroads
Addressing the increasing need for pavement materials coincides with an increasing supply of plastic waste. Incorporating recycled plastic into aggregate for transportation infrastructure is of growing interest. Testing plastic waste material in both asphalt and concrete pavement mixtures revealed promising results and the need to explore long-term performance and durability. Availability of good quality aggregate … Continue reading Testing Recycled Plastics in Asphalt and Concrete Paveme...| Crossroads
Pavement markings make travel safer for all road users. However, the material used for retroreflectivity can be slicker than the surrounding pavement. To maximize the safety of bicyclists, motorcyclists and pedestrians, MnDOT and local agencies explored the friction values of different marking materials. Project results produced valuable information on relative friction between pavement and marking … Continue reading Evaluating the Friction of Pavement Markings and Colored Pavement→| Crossroads
Repurposing old tires as tire-derived aggregate (TDA) is a stormwater management practice that could retain phosphate in underground treatment systems and prevent it from reaching the soil, surface waters and groundwater. However, chemicals from the TDA may leach into the soil and water sources. This project identifies the environmental impacts and cost-effectiveness of deploying TDA … Continue reading Utilizing Recycled Tires to Treat Stormwater→| Crossroads
Compared to traditional intersections, roundabouts have been proven to decrease serious crashes. However, because drivers yield rather than stop upon entering roundabouts and at crosswalks, public concerns about pedestrian and bicyclist safety remain. Research and field evaluations into driver yielding and speed behaviors generated insights to guide local transportation agencies and MnDOT to further enhance … Continue reading Enhancing Safety for Pedestrians and Bicyclists at Roundabouts→| Crossroads