Traffic and Safety

Campaign: Traffic and Safety

Enhancing transportation system resiliency through V2I/V2V technology

Transportation network plays an important role in maintaining the functionality of the city. After a disaster happens, the traffic pattern can be dramatically changed due to the road failure, population evacuation, or rescue efforts. Due to the incompleteness of information, drivers may underreact to the disaster, resulting in safety risks, or overreact, leading to exacerbated congestions. Both scenarios may cause further ...more »

Submitted by (@xin.wang)

Idea Submitted by : Xin Wang

List your MnDOT Office,District,City, County, Univ. or Other : University of Wisconsin-Madison

Idea Champion - Who at MnDOT/LRRB? : TBD

Why is this a priority and what are the benefits for the State/County/City? :

This research will provide a framework to evaluate the benefit of the future deployed V2I/V2V, especially under the disaster scenario (e.g., the reduction of population threatened by disasters). In addition, the proposed framework can also be widely generalized to evaluate the enhancement of daily operation capabilities of the agency.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Traffic and Safety

The real value of Toward Zero Death

The real value of TZD has not been shown in terms of lives saved including reduced serious/minor injuries along with health care cost savings and employee/employer’s cost savings. The data to date reflects the lower number of crashes and related lower fatalities and corresponding injuries. We have not been showing the public the savings data resulting from the fewer crashes that is the result of the TZD program. ...more »

Submitted by (@luane.tasa)

Idea Submitted by : Luane Tasa

List your MnDOT Office,District,City, County, Univ. or Other : District 2 State Aid

Idea Champion - Who at MnDOT/LRRB? : Bruce Hasbargen

Why is this a priority and what are the benefits for the State/County/City? :

People involved in TZD need to see that their efforts are valued. Currently we see the reduction in crashes and fatalities, however the value of those reduced crashes are only in numbers and the other values in terms of savings in grief, sorrow, and financial are not measured and are the very reason TZD was initiated. The benefits would be to energize the TZD efforts by having annual reports of these savings to the public to raise more awareness of TZD. We have been promoting a 5th E in the NW district and that is Everyone. This is one way of getting the message out that everyone should be involved in changing the culture of safety while driving the highways.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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Campaign: Traffic and Safety

Comprehensive Investigation of Aggregates in Asphalt Mixture Designs and Relationship to Compaction

Compaction is the most crucial factor in constructing durable asphalt pavements. The current asphalt mixture designs use a target of 4% air voids, however, the mixtures are compacted in the field at a target of 7% air voids and in some instances as high as 10% air voids are allowed. Recent research has shown that a different approach, in which the mixtures are designed at 5% and compacted at 5% in the field, could result ...more »

Submitted by (@dave.vandeusen)

Idea Submitted by : Dave Van Deusen; John Garrity

List your MnDOT Office,District,City, County, Univ. or Other : OMRR

Idea Champion - Who at MnDOT/LRRB? : John Garrity

Why is this a priority and what are the benefits for the State/County/City? :

This is a priority for road owner agencies because asphalt mixture density is the primary factor affecting long-term pavement performance.

 

Primary benefits are:

 

1. A better understanding of aggregate materials properties and how they affect the constructability of mixtures they are used in; and

 

2. Improved mixture design procedure to reconcile differences that currently exist between assumptions made in the lab and reality in the field.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Traffic and Safety

Network-wide impact of freeway bottleneck improvements

Freeway networks in urban areas contain a number of bottlenecks (merge, diverge, weave, curve, etc.) where congestion often occurs. The performance of these bottlenecks may be improved by a number of traffic management strategies such as ramp-metering, variable speed limits, capacity expansion, etc. However, traffic operations at these bottlenecks may not be isolated: an improvement of one bottleneck may impact the performance ...more »

Submitted by (@sueyahn)

Idea Submitted by : Soyoung (Sue) Ahn

Idea Champion - Who at MnDOT/LRRB? : TBD

Why is this a priority and what are the benefits for the State/County/City? :

This research will help an agency to better assess the operational benefits of freeway traffic management strategies, considering the interactions between bottlenecks and their network-wide impact. Therefore, this research will help an agency develop plans to improve freeway operations more strategically and holistically.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Traffic and Safety

Enhancement and Integration of the TeTRIS and TICAS Freeway Performance Tools

This project would integrate the TeTRIS and TICAS Freeway Performance Tools into one system. The Traffic Information & Condition Analysis System (TICAS) was developed for the RTMC several years ago to help extract RTMC freeway data and develop performance measures for the metro freeway system. TeTRIS is currently being developed to be able to monitor travel time reliability on metro freeways. This project would combine ...more »

Submitted by (@brian.kary)

Idea Submitted by : Brian Kary

List your MnDOT Office,District,City, County, Univ. or Other : Metro District - RTMC

Idea Champion - Who at MnDOT/LRRB? : Brian Kary

Why is this a priority and what are the benefits for the State/County/City? :

MnDOT is developing new performance measures to track congestion levels on metro freeways. This tool will allow staff to more quickly access traffic data allowing for more in depth analysis into freeway performance. It will also consolidate existing tools into one.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Traffic and Safety

Deploy and Test a Smartphone Based Accessible Traffic Information System for the Visually Impaired

We have developed a smartphone-based accessible pedestrian system to support wayfinding and navigation for people with vision impairment at both signalized and un-signalized intersections. A digital map was also created to support the wayfinding app. Our system allows a visually impaired pedestrian to receive signal timing and intersection geometry information from a smartphone app for wayfinding assistance. A beacon ...more »

Submitted by (@chenfu)

Idea Submitted by : Chen-Fu Liao

List your MnDOT Office,District,City, County, Univ. or Other : University of Minnesota

Idea Champion - Who at MnDOT/LRRB? : Steve Misgen and Cory Johnson

Why is this a priority and what are the benefits for the State/County/City? :

An increasing number of Accessible Pedestrian Signals (APS) have been installed at new or upgraded intersections to assist people with vision impairment to navigate streets. For un-signalized intersections and intersections without APS, people with vision impairment have to reply on their own orientation and mobility skills to gather necessary information to navigate to their destinations. This proposed approach will allow state, county, or local agencies to provide a more complete and accessible solution to the visually impaired community, thus improving their mobility and independence in using the transportation system. Furthermore, this project will evaluate the efficacy of VPN to provide a secure wireless environment for communicating with traffic signal controllers. In addition, our approach can also be applied for providing the visually impaired with sidewalk workzone bypass or bus arrival information at bus stops.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Traffic and Safety

Deploy and Evaluate the Effectiveness of New Driver-Assist Systems for Maintenance Operations

Snowplow operators often face environmental challenges such as severe weather conditions and poor visibility while performing tasks required to successfully clear roadways. We have developed two driver-assist systems, i.e., a lane boundary guidance system and a backup assist system, to support snowplow operators. Human factors studies have been conducted for both applications to gather operator feedback regarding different ...more »

Submitted by (@chenfu)

Idea Submitted by : Chen-Fu Liao and Max Donath

List your MnDOT Office,District,City, County, Univ. or Other : University of Minnesota

Idea Champion - Who at MnDOT/LRRB? : Cory Johnson

Why is this a priority and what are the benefits for the State/County/City? :

Snowplowing is a challenging task especially in severe weather conditions where visibility and roadway boundary cues are limited. It is important to ensure safety and provide situation awareness for the plow operators. Our lane boundary guidance and backup assist systems have been demonstrated and can be deployed to support snowplow operations and enhance safety. This proposed research will enhance the relatively low-cost driver-assist systems we developed in 2016-17 to better meet the needs of snowplow operators and provide useful information to support both plowing operations and backing up the plow.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Traffic and Safety

Signs: Life Cycle and Evaluation Testing

Part 1 - Life Cycle: Create on-going test site to determine life cycle of signs through the testing of retro-reflectivity, color, fluorescence and ink. This test will include different sheeting types (IV, IX and XI) and manufactures. MnDOT will provide the signs, if more samples are needed we will request them from local government agencies. The objective is to determine the life cycle of the various types of signs. Develop ...more »

Submitted by (@josie.tayse)

Idea Submitted by : Josie Tayse

List your MnDOT Office,District,City, County, Univ. or Other : MnDOT Metro District Traffic

Idea Champion - Who at MnDOT/LRRB? : Steve Misgen

Why is this a priority and what are the benefits for the State/County/City? :

Part 1 – Life Cycle: Determine life cycle of different sign characteristics. There has been research on sign life in respect to retro-reflectivity. However there is little research on sign color, ink and fluorescence sign life. This project will help answer how long different sheeting types last and what happens after the fluorescent properties fade.

 

Part 2 – Evaluation Testing: We are placing sheeting type XI and fluorescent sign up as MnDOT's standard. This human factors test will help determine how people react to these signs at different sign ages and if we should modify our standards. There are comments of signs being too bright in rural non-lit areas this project will test how people read and understand signs in lit and unlit areas with different sheeting types. Also how people react to fluorescent verses standard yellow signs at different sign ages, from brand new to when the fluorescent properties are gone. These answers will help update standards, policies and practices.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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Campaign: Traffic and Safety

Design standards for unobstructed sight lines at left-turn lanes

Vehicles waiting in a left-turn lane, especially large vehicles, can block the view of drivers waiting in the opposing left-turn lane. With the increasing use of flashing yellow arrows, blocked sight lines are becoming a greater safety concern. Blocked sight lines may also cause needless traffic delays when drivers are unable to determine safe gaps. To provide unobstructed sight lines, some states specify lane offsets; ...more »

Submitted by (@lrrbmetrofocusgroup)

Idea Submitted by : LRRB Metro Focus Group

Idea Champion - Who at MnDOT/LRRB? : Kristi Sebastian - Dakota County

Why is this a priority and what are the benefits for the State/County/City? :

Revised design standards and new best practices could improve safety and reduce crashes at intersections. In addition, drivers would feel more comfortable estimating safe gaps, so traffic operations and flow should improve, thereby optimizing intersections and reducing delay. Also, if traffic engineers are confident in sight lines, they may specify flashing yellow arrows more often, for additional gains in traffic flow.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : LRRB Research

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Campaign: Traffic and Safety

Criteria and design guidelines for three-lane roads

Four-lane undivided highways pose safety risks for drivers, pedestrians, bicyclists, and people waiting at transit stops. To improve roadway safety and offer multimodal options, agencies are increasingly retrofitting four-lane road segments into three lanes and constructing three-lane roadways. However, criteria to determine when three-lane roads are feasible and appropriate, as well as guidelines for designing them, ...more »

Submitted by (@lrrbmetrofocusgroup)

Idea Submitted by : LRRB Metro Focus Group

Idea Champion - Who at MnDOT/LRRB? : Jack Broz - Richfield

Why is this a priority and what are the benefits for the State/County/City? :

Improved traffic safety is the primary benefit of this work. Compared with four-lane roads, three-lane segments have lower speeds and less speeding, particularly by high-speed outliers. Left-turn lanes reduce left-turn, rear-end, and sideswipe crashes. Added bicycle and pedestrian infrastructure improves safety for those users.

 

Criteria and guidelines might enable engineers to increase use of three-lane roads. Communications materials or tools would help agencies educate citizens about the benefits of these roads and gain their support. Consistent road designs would help drivers become accustomed to driving on three-lane roads.

 

In addition to safety benefits, the reduction of lanes allows the roadway cross section to be reallocated for other uses such as bike lanes, pedestrian refuge islands, and transit stops, improving quality of life and fostering active transportation in communities.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : LRRB Research

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Campaign: Traffic and Safety

Guidance for Protected/Buffered Bike Lanes with Delineators

Interest continues to grow in safe bicycle facilities such as protected bike lanes. Adding flexible bike-lane delineators is a relatively quick and affordable way to create a protected bike lane. The City of Minneapolis, for example, has added delineators on a number of streets. This project would provide information about bike-lane delineators—including types, benefits, drawbacks—and criteria for implementing them. ...more »

Submitted by (@lrrbmetrofocusgroup)

Idea Submitted by : LRRB Metro Focus Group

Idea Champion - Who at MnDOT/LRRB? : Paul Oehme - Chanhassen

Why is this a priority and what are the benefits for the State/County/City? :

Well-designed, interconnected bicycle facilities allow bicyclists to safely and conveniently get where they want to go. This increased sense of safety may encourage additional people to consider biking, more often, potentially reducing auto travel and improving public health. Safety may be improved for non-motorized and motorized vehicles if shared roads lead to slower speeds and reduced crashes. Better information developed through this project would guide agency decision-making and help engineers make cost-justified decisions about delineator installation. Guidelines could indicate potential methods to reduce maintenance costs. The project could also provide valuable information for cooperating with the community and bicycle advocates about bicycle improvements.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : LRRB Research

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Campaign: Traffic and Safety

Automated Sight Distance Evaluations

Adequately designed vertical and horizontal highway curves provide sufficient sight distance for a driver to perform common maneuvers, e.g., safely stopping when an obstacle is detected ahead on the road or when passing a vehicle. Available sight distance on a highway segment is a function of the expected speed of drivers, which is ideally the design speed. As a result, when posted speed changes are proposed, alignment ...more »

Submitted by (@mchitturi)

Idea Submitted by : Madhav V. Chitturi (mchitturi@wisc.edu)

Idea Champion - Who at MnDOT/LRRB? : TBD

Why is this a priority and what are the benefits for the State/County/City? :

Data analysis tool that eliminates or reduces the need to perform sight distance evaluations on the field thus improving the safety of field personnel as well as saving valuable resources to the DoT. Furthermore, this tool can enable state agencies to perform evaluations periodically at limited additional expense.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : Joint MnDOT/LRRB Research

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