scholarly journals Effect of Various Speed Management Strategies on Bicycle Crashes for Urban Roads in Central Florida

2021 ◽  
pp. 036119812110366
Author(s):  
Jorge Ugan ◽  
Mohamed Abdel-Aty ◽  
Qing Cai ◽  
Nada Mahmoud ◽  
Ma’en Al-Omari
Keyword(s):  
Management Strategies ◽  
Crash Analysis ◽  
Department Of Transportation ◽  
Crash Frequency ◽  
Central Florida ◽  
Bicycle Safety ◽  
Effective Strategies ◽  
Florida Department ◽  
Safety Performance Functions ◽  
Speed Management

In recent years, cycling has become an increasingly popular transportation mode around the world. In comparison with other popular modes of transportation, cycling is economical and energy efficient. While many studies have been conducted for the analysis of bicycle safety, most were limited in bicycle exposure data and on-street data. This study tries to improve the current safety performance functions for bicycle crashes at urban corridors by utilizing crowdsource data from STRAVA and on-street speed management strategies data. Speed management strategies are any roadway alterations that cause a change in motorists’ driving behavior. In Florida, these speed management strategies are defined by the Florida Department of Transportation design manual. Considering the disproportionate representation of cyclists from the STRAVA data, adjustments were made to represent more accurately the cyclists based on the video detection data by developing a Tobit model. The adjusted STRAVA data was used for bicyclist exposure to analyze bicycle crashes on urban arterials. A Bayesian joint model was developed to identify the relations between the bicycle crash frequency and factors relating to speed management strategies. Other factors, such as vehicle traffic data, roadway information, socio-demographic characteristics, and land use data, were also considered in the model. The results suggest that the adjusted STRAVA data could be used as the exposure for bicycle crash analysis. The results also highlight the significant effects of speed management strategies, such as parking lots and surface pavement. It is expected that these findings could help engineers develop effective strategies to enhance safety for bicyclists.

scholarly journals Identifying Traffic Safety Practices and Needs of Local Transportation and Law Enforcement Agencies

2014 ◽  
Author(s):  
Kirolos Haleem ◽  
Albert Gan ◽  
Priyanka Alluri ◽  
Dibakar Saha
Keyword(s):  
Law Enforcement ◽  
Traffic Safety ◽  
Lessons Learned ◽  
Crash Analysis ◽  
Department Of Transportation ◽  
Law Enforcement Agencies ◽  
Safety Practices ◽  
Florida Department ◽  
Traffic Violations ◽  
Transportation Agencies

As part of the effort to implement the Strategic Highway Safety Plan (SHSP), state departments of transportation are looking to reach out to local and law enforcement agencies. This paper presents a study by the Florida Department of Transportation (FDOT) to identify the existing safety practices and needs of local transportation agencies and law enforcement offices in Florida. Two comprehensive online surveys targeting local transportation agencies and law enforcement agencies are developed. The survey for local transportation agencies includes 39 questions on topics including standardization of crash analysis methods, training needs, and working with FDOT. For law enforcement agencies, the survey includes 25 questions covering topics on enforcement locations, traffic violations and safety campaigns, use of crash reports, and working with transportation agencies. Results from both surveys and lessons learned are discussed.

Roadway Context Classification Approach for Developing Regional Safety Performance Functions for Florida Intersections

2020 ◽  
Vol 2674 (2) ◽  
pp. 191-202
Author(s):  
Ghalia Gamaleldin ◽  
Haitham Al-Deek ◽  
Adrian Sandt ◽  
Alan El-Urfali ◽  
Md Imrul Kayes ◽  
...  
Keyword(s):  
Classification System ◽  
Negative Binomial ◽  
Safety Performance ◽  
P Value ◽  
Department Of Transportation ◽  
Florida Department ◽  
Safety Performance Functions ◽  
Traffic Volumes ◽  
Road Width ◽  
Data Elements

Understanding how the type and location of intersections affect crashes is important to reduce these crashes effectively. This paper discusses the development of regional safety performance functions (SPFs) based on a new context classification system developed by the Florida Department of Transportation (FDOT). This classification system (which has not previously been used) categorizes intersections into eight different categories based on land use and other parameters, allowing SPFs to be developed for up to 32 different types of intersections. The Model Inventory of Roadway Elements (MIRE) 2.0 was used as the standard inventory for the data elements collected. Using MIRE 2.0 allows for the procedures conducted in this study to be easily implemented in other states. SPFs were developed for two intersection groups. First, a linear regression model was built to predict missing minor traffic volumes. This statistically significant model ( p-value < 0.05) had an adjusted R-square of 0.7648. Data were collected for over 25 potential predictor variables (including a regional variable for FDOT districts) and used to fit a negative binomial model to each studied intersection group. Some variables (such as major traffic volume) were significant for both groups, but each SPF had unique variables (such as speed limit and road width). Different regions were significant for each group, showing how crashes vary for different intersection types in different regions. By allowing for the development of SPF models for many intersection classifications, FDOT’s context classification system can be used by other agencies to identify crash-influencing factors better for different conditions.

Full-Scale Load Testing and Extraction of Augered Cast-in-Place (ACIP) Piles in Central Florida

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Antonio Marinucci
Keyword(s):  
Visual Inspection ◽  
Full Scale ◽  
South Florida ◽  
Silty Sand ◽  
Load Testing ◽  
Strain Gages ◽  
Department Of Transportation ◽  
Central Florida ◽  
Florida Department ◽  
The University

A full-scale field demonstration project consisting of installation, instrumentation, testing, and extraction of augered cast-in-place (ACIP) piles located in central Florida was undertaken in conjunction with the Florida Department of Transportation and the University of South Florida. Seven instrumented ACIP piles, with a nominal diameter of 457 mm (18 in) or 610 mm (24 in), were installed in mainly sand and silty sand. Load testing was performed on six ACIP piles: two in compression, two in tension, and two laterally. In addition, one of the ACIP piles was extracted for visual inspection and comparison to predictions and measurements. The program demonstrated the fully monitored installation and load tested performance of instrumented ACIP piles, along with the use of manual and automated monitoring; use and accuracy of embedded instrumentation, including thermal integrity profiling (TIP) and embedded strain gages; load-displacement behavior of tested ACIP piles; and the integrity and as-constructed geometry of an exhumed ACIP pile. This paper presents the details, results from the different testing performed, and observations from the experimental field program.

Cogongrass (Imperata cylindrical) Distribution on Florida Highway Rights-of-Way

1990 ◽  
Vol 4 (3) ◽  
pp. 658-660 ◽  
Author(s):  
Tommy R. Willard ◽  
David W. Hall ◽  
Donn G. Shilling ◽  
James A. Lewis ◽  
Wayne L. Currey
Keyword(s):  
Soil Stabilization ◽  
Lake Okeechobee ◽  
North Central Region ◽  
Department Of Transportation ◽  
North Central ◽  
Central Florida ◽  
The North ◽  
Florida Department ◽  
Roadway Construction ◽  
Highway System

A survey of Florida highway rights-of-way was conducted during 1984–85 to determine the occurrence and severity of cogongrass infestation. Florida Department of Transportation district maintenance engineers surveyed 8,200 km of limited-access and other major highways (22% of highway system). Cogongrass was distributed widely from the north central region southward through the central Florida ridge north of Lake Okeechobee. Highest frequencies were in counties where cogongrass was used for forage and soil stabilization during the 1950s. The large, widely scattered cogongrass infestations probably were established during extensive roadway construction and routine maintenance which used rhizome-contaminated fill soil.

scholarly journals Pain experience, pain management strategies and satisfaction of hospitalized trauma patients in Indonesia

2017 ◽  
Vol 8 (1) ◽  
pp. 79
Author(s):  
Deya Prastika ◽  
Luppana Kitrungrote ◽  
Jintana Damkliang
Keyword(s):  
Pain Management ◽  
Pain Intensity ◽  
Management Strategies ◽  
Healthcare Providers ◽  
Pain Interference ◽  
Trauma Patients ◽  
Pain Experience ◽  
Analgesic Drugs ◽  
Effective Strategies ◽  
Experience Pain

Although trauma is a common cause of greater pain and interference on daily activities, little is known about pain experience, pain management strategies and pain management outcomes in hospitalized trauma patients in Indonesia. This descriptive study aimed (1) to assess the pain experience, (2) to describe pain management strategies, and (3) to describe satisfaction with pain management conducted by healthcare providers as perceived by trauma patients. A total of 154 hospitalized trauma patients from a teaching hospital in Indonesia were recruited from January to March 2016. Data were analyzed using descriptive and inferential statistics. The study found that most of the hospitalized trauma patients had single extremity fractures (56.49%) and mild head injury (20.13%). They have experienced a mild to moderate level of pain intensity and pain interference during the first three days of admission. These pain intensity and pain interference levels were found to be significantly decreased from the first to the third day. The pain management strategies often used by the healthcare providers were showing interest and asking about pain, assessing the outcomes after receiving analgesic drugs, and giving information about pain. The pain management strategies often used by patients were praying (86.36%), slow and deep breathing (77.27%), and reciting Dzikir (meditation) (68.18%). Patients reported that performing Dzikir and praying were the effective strategies to reduce their pain. The patients rated moderate to high levels of satisfaction with pain management conducted by healthcare providers. Therefore, combinations analgesic drugs with praying and performing Dzikir related to cultural contexts are crucial to alleviate pain among hospitalized trauma patients in Indonesia.

scholarly journals Crash Prediction Models for Horizontal Curve Segments on Two-Lane Rural Roads in Thailand

2021 ◽  
Vol 13 (16) ◽  
pp. 9011
Author(s):  
Nopadon Kronprasert ◽  
Katesirint Boontan ◽  
Patipat Kanha
Keyword(s):  
Prediction Models ◽  
Safety Performance ◽  
Horizontal Curve ◽  
Crash Frequency ◽  
Rural Roads ◽  
Crash Prediction ◽  
Road Crashes ◽  
Highway Safety Manual ◽  
Safety Performance Functions ◽  
Crash Prediction Models

The number of road crashes continues to rise significantly in Thailand. Curve segments on two-lane rural roads are among the most hazardous locations which lead to road crashes and tremendous economic losses; therefore, a detailed examination of its risk is required. This study aims to develop crash prediction models using Safety Performance Functions (SPFs) as a tool to identify the relationship among road alignment, road geometric and traffic conditions, and crash frequency for two-lane rural horizontal curve segments. Relevant data associated with 86,599 curve segments on two-lane rural road networks in Thailand were collected including road alignment data from a GPS vehicle tracking technology, road attribute data from rural road asset databases, and historical crash data from crash reports. Safety Performance Functions (SPFs) for horizontal curve segments were developed, using Poisson regression, negative binomial regression, and calibrated Highway Safety Manual models. The results showed that the most significant parameter affecting crash frequency is lane width, followed by curve length, traffic volume, curve radius, and types of curves (i.e., circular curves, compound curves, reverse curves, and broken-back curves). Comparing among crash prediction models developed, the calibrated Highway Safety Manual SPF outperforms the others in prediction accuracy.

Development and Implementation of a Pavement Marking Management System in Florida

2018 ◽  
Vol 2672 (12) ◽  
pp. 209-219
Author(s):  
Bouzid Choubane ◽  
Joshua Sevearance ◽  
Charles Holzschuher ◽  
James Fletcher ◽  
Chieh (Ross) Wang
Keyword(s):  
Management System ◽  
Handheld Devices ◽  
Department Of Transportation ◽  
Pavement Markings ◽  
Lighting Conditions ◽  
Florida Department ◽  
Roadway Safety ◽  
Application Techniques ◽  
Effective Use ◽  
Pavement Marking

The visibility of pavement markings is an important aspect of a safe transportation system as the markings convey vital roadway warnings and guidance information to the traveling public. Therefore, it is beneficial to maintain acceptable visibility levels of markings on pavements under all weather and lighting conditions. To ensure the intended in-service visibility level is adequately maintained, the reflectivity must be monitored and quantified accordingly. Historically, visibility or retroreflectivity of in-service pavement markings has been measured with handheld devices and visual inspections. However, visual surveys are considered subjective and the handheld measurements are tedious and potentially hazardous. Consequently, the Florida Department of Transportation (FDOT) has focused on the use of a non-contact technology capable of assessing pavement markings continuously at highway speeds with improved safety and efficiency. The use of mobile technology for measuring reflectivity has allowed FDOT to develop and, subsequently, implement a Pavement Marking Management System (PMMS) to improve the safety and nighttime visibility of its roadways. Implementation of such a system provides an efficient and less subjective methodology to identify conditions that are detrimental to roadway safety, and strategize mitigating solutions including the selection of appropriate materials and application techniques. The system will ultimately result in an effective use of state funds while ensuring the safety of the traveling public. This paper presents a description of the Florida Pavement Markings Management System and its subsequent implementation including FDOT’s effort to ensure the quality, consistency, repeatability, and accessibility of statewide pavement marking retroreflectivity data.

scholarly journals The Development of Safety Performance Functions for Roundabouts in Amman, Jordan

2019 ◽  
Vol 296 ◽  
pp. 01006 ◽  
Author(s):  
Diana AL- Nabulsi ◽  
Khair Jadaan
Keyword(s):  
Urban Areas ◽  
Developed Countries ◽  
Safety Performance ◽  
Statistical Tool ◽  
Crash Frequency ◽  
Road Crashes ◽  
Design Variables ◽  
Safety Performance Functions ◽  
Strong Relation ◽  
Pedestrian Crossing

It is now well established that crash occurrences at roadway segments or intersections are associated with a large variety of factors. Safety Performance Functions (SPF) are statistical models developed to predict crash frequencies for various design variables. In Jordan, almost half of all road crashes occur at intersections, mostly in urban areas. There is a significant number of roundabouts throughout Amman which is increasing without evaluating their safety performance. To assess safety benefits of this kind of intersections, transportation professionals need the powerful statistical tool; the SPF. This study aims to develop SPFs for roundabouts in Amman. The models consider the crash frequency, traffic volume and geometric features of all the studied 20 roundabouts. The developed SPFs were statistically significant (R^2 = 0.91) .The findings of the study revealed that crash frequency has a strong relation with the AADT, roundabout entry angle-degrees, entry path radius, splitter radius, pedestrian crossing structure, inscribed diameter, central diameter, circulating width, entry width, number of circle legs. The developed SPFs are evaluated through a comparison with others from developed countries.

Transit Incentive Program for Transit-Dependent Riders

1997 ◽  
Vol 1604 (1) ◽  
pp. 139-145
Author(s):  
James McLaughlin ◽  
Daniel K. Boyle
Keyword(s):  
Los Angeles ◽  
Los Angeles County ◽  
Public Involvement ◽  
Department Of Transportation ◽  
Effective Strategies ◽  
Incentive Program ◽  
System Improvement ◽  
Bus Service ◽  
Transit Agencies ◽  
Bus System

Five years ago, several transportation agencies in Los Angeles County began discussions on developing a process to reevaluate the existing bus service delivery system, including the opportunity for public involvement and participation. As a result, the concept of a thorough restructuring study was developed. Restructuring studies are closely related to other activities focused on the bus system. In March 1996, the Metropolitan Transportation Authority (MTA) board approved a broad-based bus system improvement plan that tied together many of the ongoing service improvements with proposed plans and programs to provide a 2- to 5-year set of goals to improve bus service in Los Angeles. It is in this context that the MTA and the Los Angeles Department of Transportation commissioned a special work effort as part of the Central/East/Northeast restructuring study to examine options for a transit incentive program for transit-dependent riders. The transitory nature of transit dependency has gained increased awareness in recent years, but development of effective strategies has lagged behind as transit agencies have targeted discretionary travelers as the largest pool of potential riders. The approach taken is to identify and describe rider-incentive programs implemented at other transit agencies that target or can be applied to the transit-dependent population, to consider public input about incentives and rewards that would be attractive to these riders, and to note key neighborhoods in the study area where there are significant numbers of households without automobiles. The objectives are to develop options for a pilot incentive program and to define the type of area appropriate for a focused demonstration-type project. The application of ideas as part of the consent decree negotiated by the Los Angeles County MTA is summarized.

Effect of Speed, Flow, and Geometric Characteristics on Crash Frequency for Two-Lane Highways

2000 ◽  
Vol 1717 (1) ◽  
pp. 76-83 ◽  
Author(s):  
Nicholas J. Garber ◽  
Angela A. Ehrhart
Keyword(s):  
Department Of Transportation ◽  
Deterministic Models ◽  
Crash Frequency ◽  
Crash Rates ◽  
The Past ◽  
Speed Flow ◽  
Lane Width ◽  
The Mean ◽  
Virginia Department ◽  
Made In

Although during the past several years significant progress has been made in improving safety on U.S. highways, the frequency and severity of crashes continue to be of concern. A better understanding of the factors associated with crashes will facilitate the identification of suitable countermeasures that could further reduce the occurrence of crashes. Results are presented from a study that determines how the characteristics of speed, flow, and geometry affect the crash rates for two-lane highways. Deterministic models that relate the crash rate with the mean speed, standard deviation of speed, flow per lane, lane width, and shoulder width are presented. The multivariate ratio of polynomials method was used to develop the models. Research was limited to two-lane roadways in Virginia with speed limits of 89 km/h (55 mph). The data were obtained from speed-monitoring stations established by the Virginia Department of Transportation and from police accident reports from January 1993 to September 1995.

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