Intersections can be controlled through pretimed systems or vehicle-actuated systems, which detect the presence of a vehicle. Good vehicle detection is the foundation of actuated systems. While loop detectors have been effective workhorses of vehicle detection for MnDOT, changes in vehicle fleets—for example, the use of nonferrous materials—and an increased need to detect vulnerable road users has resulted in an increased use of nonintrusive detection technologies (NIT).
Continue reading New Project: Performance Evaluation of Detection Technologies for Signalized Intersections in MinnesotaCategory Archives: Traffic and Safety
New Project: Mobile-Device Data, Non-Motorized Traffic Monitoring, and Estimation of Annual Average Daily Bicyclist and Pedestrian Flows
Understanding pedestrian and bicyclist flows is vital to distributing a limited construction budget to new infrastructure for improved safety on specific roads. Unfortunately, statewide data collection for active transportation flows is challenging.
MnDOT and local agencies historically have lacked estimates of bicycle and pedestrian traffic on Trunk Highways and County State Aid Highways.
Since about 2016, MnDOT has begun monitoring bicycle and pedestrian flow at more than 25 locations across the state, but, given the small number of counters and the variability of flows in response to variations in weather across Minnesota, these monitoring data are insufficient for estimation of Annual Average Daily Bicyclists and Annual Average Daily Pedestrians.
One option for obtaining travel data without expensive infrastructure is relying on mobile data collection.
Continue reading New Project: Mobile-Device Data, Non-Motorized Traffic Monitoring, and Estimation of Annual Average Daily Bicyclist and Pedestrian Flows
Improved In-Vehicle Lane Departure Warning System Approaches Commercial Use
Using an earlier lane departure warning system (LDWS) that employs standard GPS data rather than expensive cameras or maps, Minnesota researchers have enhanced and refined the system, moving closer to an affordable product to warn drivers about dangerous lane drift and approaching curves.
Continue reading Improved In-Vehicle Lane Departure Warning System Approaches Commercial Use
MnDOT Prepares to Use Future Vehicle-to-Vehicle Messaging
Manufacturers are developing vehicles that can “talk” to each other. “Connected vehicles” will be able to convey their position, speed and acceleration. Sending this information to other vehicles and relevant infrastructure is expected to enhance highway safety, but it also may help transportation agencies better manage traffic.
Continue reading MnDOT Prepares to Use Future Vehicle-to-Vehicle Messaging
New Project: COVID-19 Impacts on Speed and Safety for Rural Roads and Work Zones
Although Minnesotans drove significantly less in 2020 due to the COVID-19 pandemic, there was a substantial increase in fatal motor vehicle crashes. MnDOT Traffic Safety Engineer Derek Leuer and his colleagues want to know why, particularly in rural areas where fatalities and injury rates were higher.
Continue reading New Project: COVID-19 Impacts on Speed and Safety for Rural Roads and Work Zones
New Project: What COVID Travel Reductions Tells Us About Effective Congestion Relief
As Minnesota worked to slow the transmission of COVID-19 in 2020, travel on MnDOT roadways dropped sharply and carried with it a corresponding drop in congestion.
Continue reading New Project: What COVID Travel Reductions Tells Us About Effective Congestion Relief
Improving Winter Road Weather Alerts on Highway Dynamic Message Signs
MnDOT maintains nearly 400 dynamic message signs (DMS) along Minnesota highways that display real-time information to warn motorists of roadway incidents, construction or congestion ahead that could pose a hazard or cause delay. DMS use to convey weather alerts has been limited to blizzards and other very isolated winter conditions. MnDOT has been concerned about the timeliness of weather messages and the chance that such messages could be overused, possibly leading motorists to take them less seriously.
Continue reading Improving Winter Road Weather Alerts on Highway Dynamic Message Signs
New Project: Understanding Post-COVID Safety Concerns, Perceptions and Preferences of Transit and Shared Mobility Users in Minnesota
Transit ridership dropped significantly last year in Minneapolis, Duluth and other cities during the COVID-19 pandemic.
Continue reading New Project: Understanding Post-COVID Safety Concerns, Perceptions and Preferences of Transit and Shared Mobility Users in Minnesota
Smartphone App Gives Crossing Guidance to the Visually Impaired
In a recent research project, MnDOT sought to validate a smartphone app designed to guide pedestrians who are blind or visually impaired through signalized and unsignalized intersections. The project succeeded in showing the app’s effectiveness in tests at six intersections in Stillwater, Minnesota.
Continue reading Smartphone App Gives Crossing Guidance to the Visually Impaired
Understanding Rural Pedestrian Travel Behavior and Safety Issues
In collaboration with the Advocacy Council for Tribal Transportation and other tribal members, University of Minnesota researchers monitored 10 roadway sites specified as safety risks for pedestrians on four rural Minnesota reservations. Analysis of videos and group brainstorming produced a shortlist of potential countermeasures that could be incorporated into future highway projects.
Continue reading Understanding Rural Pedestrian Travel Behavior and Safety Issues