Traffic and Safety

Traffic and Safety

Evaluation of Metro Freeway System for Reliability and Resilience

Developing and operating a reliable and resilient freeway network, which can absorb, recover and adapt to actual and potential adverse events, is of critical importance in sustaining the way of life and economic vitality of the metro area. Through the TeTRES tool developed in previous, research could be completed to study freeway network reliability and resiliency which could help MnDOT develop TSMO strategies or corridor ...more »

Submitted by (@brian.kary)

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Traffic and Safety

Impact of Transitway Parking Infrastructure on Mode Choice and Traffic Flow/Volume on Neighboring Roadway Network

What impact does the transitway parking infrastructure have on mode choice and traffic flow/volume on the neighboring roadway network? The term transitway refers to corridors served by fast, reliable, and high-quality passenger transit service such as light rail, commuter rail, and bus rapid transit. Transitways serve high-demand corridors with facility and route improvements that may include dedicated stations and right-of-way. ...more »

Submitted by (@kkirk.tirp)

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Traffic and Safety

Impact of Transitways on Vehicle Use/Travel on Parallel and Adjacent Route Highways and Major Roads

How do transitways impact vehicle use/travel on parallel and adjacent route highways and major roads? The term transitway refers to corridors served by fast, reliable, and high-quality passenger transit service such as light rail, commuter rail, and bus rapid transit. Transitways serve high-demand corridors with facility and route improvements that may include dedicated stations and right-of-way. (Definition provided ...more »

Submitted by (@kkirk.tirp)

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Traffic and Safety

GNSS Evaluation Toolkit

Advancements in connected and automated vehicles have fueled the demand for technologies that enable high accuracy positioning and navigation such as Global Navigation Satellite Systems (GNSS). One method for using GNSS to generate position solutions accurate to the centimeter-level is called Real Time Kinematic (RTK) positioning which relies on corrections data provided by a network of reference stations. MnDOT plays ...more »

Submitted by (@davis862)

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Traffic and Safety

Assessment of Pedestrian Safety near Metro Transit Stops

Pedestrian fatalities and injuries represent a growing percentage of all traffic fatalities and injuries. These fatalities comprised 10.9% of all traffic deaths nationwide in 2004, but 14.5% in 2013 and 15% in 2015 (NHTSA, 2017). A recent MnDOT analysis found a significant correlation between bus stops and severe pedestrian and bicycle crashes. The metro transitway may influence the interaction between the automobile ...more »

Submitted by (@curtismc)

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Traffic and Safety

Understanding driver trust and risk acceptance in automated vehicles

Connected and automated vehicle technologies offer immense potential to reduce serious injury and fatal crashes attributed to driver behavior. A recent study from MIT found a decline from 2016 to 2017 in drivers' acceptance of fully autonomous vehicles or even vehicles only periodically taking over driving, citing discomfort or poor trust in allowing the vehicle to control driving. In Minnesota, this effect may be compounded ...more »

Submitted by (@nlmorris)

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Traffic and Safety

Identify Engineering Risk Factors for Twin Trailer and Long Combination Vehicles

Long Combination Vehicles such as Twin Trailers pose a particular challenge for transportation authorities in ensuring that safe routes are identified and approved for travel. This research proposes to identify all of the safety risk factors and hazards around twin trailers and other multi-unit freight vehicles on highways. The results of this synthesis would be used to inform future updates and evaluations for the Minnesota ...more »

Submitted by (@andrew.andrusko)

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Non-Intrusive Traffic Counting methods

Field staff currently count locations with hoses and traffic counters. More and more of the manual count locations such as these are difficult/unsafe (dangerous) to place hose counts - especially class counts versus regular volume counts. There are traffic cameras in place at some locations - could these be used to count traffic for the information needed? Are other non-intrusive traffic counting methods possible? The ...more »

Submitted by (@lia.nistler)

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Traffic and Safety

New Frontiers in Geometric Design – Designing for the Driver’s Encounter

Roundabouts, reverse diamonds, and back-in parking are several of the new geometric design approaches that are improving traffic safety and flow. However, developing driver understanding and confidence has required significant advance effort or a willingness to accept a steep learning curve as drivers encounter new patterns and geometries. To raise awareness and support for these new features, several innovative approaches ...more »

Submitted by (@sdruschel)

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Traffic and Safety

Pedestrian Crosswalk Policy

Although pedestrian safety is always a focus, recent data shows an increase in crashes involving pedestrians. Additionally, agencies continually get calls/requests from residents asking for crosswalks. Local agencies are asking for guidance on: • When should crosswalks be installed? • When should they be removed? • When should they be marked/striped? • If crosswalks are needed, what type of enhancement should be installed? ...more »

Submitted by (@mcea.ceam)

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Traffic and Safety

2018 Truck Parking Capacity and Safety Study

One of the issues facing the nation is the increased need for truck parking. At the same time there is a national shortage of truck parking. As part of Minnesota's efforts to better understand the needs across the state for truck parking MnDOT and the LRRB performed a study in 2010 to look the capacity needs at heavily utilized interstate corridors. Along with this came a federal study called the Jason's Law Survey that ...more »

Submitted by (@andrew.andrusko)

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Traffic and Safety

Pavement Marking Patterns and Widths - Human Factors Study

MnDOT currently uses the following as typical installations for pavement markings: 4" for normal width; 50' cycle (10' stripe, 40' gap) for broken line markings; and 15' cycle (3' stripe, 12' gap) for dotted line markings. Some studies have shown benefits with a wider normal width marking - particularly with 6" edgelines on two-way, two-lane roads. Other studies have shown benefits to older drivers. Due to these studies, ...more »

Submitted by (@kenjohnson)

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