Traffic and Safety

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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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

Idea Status (this will be updated by the moderator) : Need Statement #496

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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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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

Idea Status (this will be updated by the moderator) : Need Statement #502

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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

Idea Status (this will be updated by the moderator) : Need Statement #513

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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

Idea Status (this will be updated by the moderator) : Need Statement #507

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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

Idea Status (this will be updated by the moderator) : Need Statement #506

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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

Idea Status (this will be updated by the moderator) : Need Statement #500

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Traffic and Safety

Autonomous Crash Attenuator

Private companies are proposing to develop and deploy autonomous crash attenuators to be utilized in mobile work zones. This technology would be an excellent way to test automated vehicles and provide safety and staffing cost benefits. This idea would be to solicit proposers to install this technology on MnDOT snowplow equipment.

Submitted by (@duane.hill)

Idea Submitted by : Duane Hill

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

Idea Champion - Who at MnDOT/LRRB? : Jay Hietpas, Duane Hill, Sue Porter, Steve Lund

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

Tests AV technology, improves employee safety, reduces cost.

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

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Traffic and Safety

High Friction Surface Treatments

There are areas along the system that have a higher degree of wet weather collisions. There are other some newer materials being developed that may provide for even greater levels of safety than our current material friction ratings. The LRRB objectives/ deliverables would be: 1. Review available research and research various materials in Minnesota as needed to determine how feasible and successful the available treatments ...more »

Submitted by (@moderator)

Idea Submitted by : MCEA County Highway Safety Committee

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

Idea Champion - Who at MnDOT/LRRB? : Tracey Von Bargen

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

Potential benefits include: Reduction in crashes especially at entrances to roundabouts which approach at grades, highway curve segments, and roadway areas susceptible to snow drifting and thus higher degree of snow and icy weather crashes. Also would create guidance for use and potential additional lower-mid cost tool for the County highway safety plan reviews and project identification.

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

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Traffic and Safety

Generating Traffic Information from Connected Vehicle V2V Basic Safety Messages

NHTSA published a notice of proposed rule making that will require all new cars as of some model year to broadcast a basic safety message (BSM) using Dedicated Short Range Communications (DSRC). The BSM will contain information such as the car's location, speed, heading and acceleration. This will enable a car to know where the surrounding cars are and avoid collisions. Installing DSRC roadside units will allow MnDOT ...more »

Submitted by (@ray.starr)

Idea Submitted by : Ray Starr

List your MnDOT Office,District,City, County, Univ. or Other : Office of Traffic, Safety & Technology

Idea Champion - Who at MnDOT/LRRB? : Ray Starr

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

Travel times and end of queue information are important in work zones for safety and mobility, and knowing queue lengths at traffic signals could potentially enable smarter traffic signal control. Listening to vehicle BSM broadcasts is a means to gain early benefits from connected vehicles. Other vehicle to infrastructure connected vehicle applications will require additional capabilities in the car beyond what NHTSA is requiring, whereas generating traffic information from BSMs will be a possibility in the nearer term when vehicles may only have the vehicle to vehicle BSM broadcast capability on board. A literature search should be performed to determine what has already been done by others.

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

Idea Status (this will be updated by the moderator) : Need Statement #493

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Traffic and Safety

Evaluation and Refinement of Queue Warning System Using ATM Infrastructure

MnDOT has been a leader in investing funding in new technologies to help reduce congestion and improve safety. One such example is the Active Traffic Management (ATM) system on I-35W and I-94 which includes intelligent lane control signals (ILCS) spaced every half mile over every lane to warn motorists of incidents or hazards on the roadway ahead. A previous project entitled "Development of a Queue Warning System Utilizing ...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? :

The systems deployed have shown some benefits in reducing crashes at these locations but the test period was too short to reach official conclusions on their success. Further analysis is needed to refine the systems and measure their benefits.

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

Idea Status (this will be updated by the moderator) : Implementation plan developed, hold for future funding consideration

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