An optimization approach for deployment of intelligent transportation systems wrong-way driving countermeasures

Sandt, Adrian; Al-Deek, Haitham

doi:10.1080/15472450.2019.1677160

Cited by 4 publications

(12 citation statements)

References 23 publications

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“…A study in Florida by the authors of this paper found that RFBs on Central Florida Expressway Authority (CFX) toll roads have caused over 83% of detected wrong-way vehicles to turn around and could provide between $26.5 and $40 million in injury savings over their 10-year life cycle (17). Other Florida studies on rectangular rapid flashing beacons (RRFBs) in Tampa and RFBs on FTE ramps found similar turnaround results (6,7,18). Studies of Florida LED WWD countermeasures found that they have much lower turnaround percentages than RFBs, but can reduce WWD 911 calls and citations by up to 48% (5,6).…”

Section: Literature Reviewmentioning

confidence: 73%

“…In Equation 4, it is assumed that countermeasures are installed at all ramps at an exit, since it is unknown which ramp will experience more WWD at exits with multiple ramps. The WWCR k values can be determined using the WWCR segment modeling methodology discussed by Sandt and Al-Deek (7). Adding the predicted values from the model to the actual number of crashes in each segment provides a WWCR k value for each segment.…”

Section: Methodsmentioning

confidence: 99%

“…This paper will estimate these future savings because of LED and RFB countermeasures for the FTE system. Previous efforts by the authors show the ability of the developed WWCR modeling and optimization approach to accurately identify limited access segments with high WWCR and predict WWCR reductions for individual exits (7,(21)(22)(23)(24)(25). By incorporating injury costs for WWD crashes, this approach can be used to determine the life-cycle benefits of advanced WWD countermeasure deployments, calculate B/C ratios for individual exits, and compare RFB and LED countermeasures.…”

Section: Literature Reviewmentioning

confidence: 99%

“…However, their high costs could discourage agencies from deploying them. An optimization approach was previously used to identify exits where advanced countermeasure deployment would provide the most WWD crash risk (WWCR) reduction for the lowest cost (7). While this approach identified the best deployment locations and estimated WWCR reductions, it did not quantify the monetary benefits because of these countermeasures.…”

mentioning

confidence: 99%

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Estimating Fatality and Injury Savings Because of Deployment of Advanced Wrong-Way Driving Countermeasures on a Toll Road Network

Sandt

Al-Deek

2021

Transportation Research Record

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Limited access facility wrong-way driving (WWD) crashes are typically more severe than other crashes. Deploying advanced WWD countermeasures, such as rectangular flashing beacon (RFB) and light-emitting diode (LED) technologies, at exit ramps can reduce WWD crashes, injuries, and fatalities. No previous research has developed a methodology to quantify the potential fatality and injury savings because of future countermeasure deployments. This paper developed such a methodology and applied it to Florida’s Turnpike Enterprise (FTE) toll road network. From 2011–2016, there were 53 FTE WWD crashes, resulting in 16 fatalities and annual injury costs of $37 million. The proportion of these crashes occurring during night-time was 87%. RFB and LED life-cycle injury savings and costs were determined for all 216 FTE exits. The total savings were $424 million for RFBs (benefit–cost [B/C] ratio of 23.20) and $144 million for LEDs (B/C ratio of 13.13). Deploying countermeasures at the 103 exits with the highest B/C ratios would provide 70% of the total possible savings by equipping 40% of the ramps. For the same capital investment, RFBs provide more savings than LEDs. Spending $1 million to deploy RFBs will provide similar savings as spending $3.4 million to deploy LEDs. Evaluating the existing FTE RFB and LED ramps shows that RFBs are more effective at night-time and can provide three times the savings of LEDs. The results of this paper show the improved performance of RFBs over LEDs and provide an example that other agencies could follow to identify savings and cost-effectively deploy advanced WWD countermeasures.

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Section: Literature Reviewmentioning

confidence: 73%

Section: Methodsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

mentioning

confidence: 99%

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Estimating Fatality and Injury Savings Because of Deployment of Advanced Wrong-Way Driving Countermeasures on a Toll Road Network

Sandt

Al-Deek

2021

Transportation Research Record

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“…of events is a good threshold for determining the segment size. A similar analysis using data from 2006 through 2016 showed that 95% of vehicles traveled five or less exits (5,6). This indicates that the chosen number of exits per segment can vary depending on the data.…”

Section: Data Description and Analysismentioning

confidence: 87%

Statewide Application of Wrong-Way Driving Crash Risk Modeling and Countermeasures Optimization Algorithm to Identify Optimal Locations for Countermeasure Deployment on Florida Limited Access Facilities

Sandt

Al-Deek

Blue

et al. 2021

Transportation Research Record

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Wrong-way driving (WWD) crashes can have significant impacts on freeway safety and operations. Deploying intelligent transportation systems (ITS) WWD countermeasures at freeway exit ramps can effectively reduce WWD crash risk (WWCR), but these countermeasures are expensive. In this paper, a WWCR segment model and WWD countermeasures optimization algorithm are developed for all Florida limited access facilities (56 roadways with 1,375 exits) to identify the optimal locations for ITS countermeasure deployment. These were previously developed for specific toll-road networks within Florida, but never for a statewide network. Multiple WWCR models were investigated, with the final Poisson model using four-exit segments and 5 years of WWD event data. This model showed that more WWD events and higher crossing road traffic volumes increased WWCR, while certain interchange designs increased or decreased WWCR. Sixty-three segments containing 169 exit ramps without ITS WWD countermeasures were identified as WWD hotspots; these ramps were compared with the 169 ramps with the highest WWCR selected by the optimization algorithm. The algorithm selected 96 ramps not in the hotspots (improved resource utilization of 56.8%) and provided a 38.6% increase in WWCR reduction. Comparing WWD detection and turnaround data from 31 sites with rectangular flashing beacon ITS countermeasures to the optimization indicated a significant positive association between WWCR and turnaround percentage (higher WWCR at sites with lower turnaround percentage), verifying the accuracy of the optimization. By showing the transferability, scalability, accuracy, and benefits of this approach, this paper can help agencies reduce WWD and improve freeway safety and operations.

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Leveraging text mining approach to explore research roadmap and future direction of wrong-way driving crash studies

Kutela

Kadeha

Magehema

et al. 2024

Data and Information Management

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An optimization approach for deployment of intelligent transportation systems wrong-way driving countermeasures

Cited by 4 publications

References 23 publications

Estimating Fatality and Injury Savings Because of Deployment of Advanced Wrong-Way Driving Countermeasures on a Toll Road Network

Estimating Fatality and Injury Savings Because of Deployment of Advanced Wrong-Way Driving Countermeasures on a Toll Road Network

Statewide Application of Wrong-Way Driving Crash Risk Modeling and Countermeasures Optimization Algorithm to Identify Optimal Locations for Countermeasure Deployment on Florida Limited Access Facilities

Leveraging text mining approach to explore research roadmap and future direction of wrong-way driving crash studies

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