Joseph E Hummer
Biographic Data
| ID | 6643333 |
|---|---|
| NAME | Joseph E Hummer |
| GIVEN NAMES | Joseph E |
| FAMILY NAME | Hummer |
| SIGNATURE | HUMMER J E |
| AFFILIATIONS | North Carolina State University |
| ORCID | 0000-0003-3598-5818 |
| VERIFIED | Yes |
| TOTAL WORKS | 12 |
| TOTAL CITATIONS | 13 |
| WORKS AS AUTHOR | 12 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2022 |
| H-INDEX | 2 |
Development and Evaluation of the Dynamic Left Turn Intersection
Dual left turn lanes are typically operated with protected left turn signals, which means extra delay during non-peak hours compared to permissive operation. To reduce this delay, the authors designed, installed, and tested a “dynamic left turn intersection” (DLTi), which is a new way to operate dual left turn lanes. With DLTi, the both lanes are operated with protected phasing during the peak hours when higher capacity is needed, and only the le…
An Estimate of Potential Savings From Removing Traffic Signals in a Depopulating Urban Area
A common rule of thumb for signalization in a city is one traffic signal for every 1,000 residents. When a city is depopulating, does this ratio apply when determining how many signals can be removed? The City of Detroit has lost 61% of its population since its peak. If signals were installed to serve the peak population, applying this rule of thumb, 61% of the signal inventory should be able to be removed. An operational analysis was performed o…
Data Collection Opportunities and Challenges for Skilled Construction Labor Demand Forecast Modeling
Forecasting skilled construction labor demand ensures that the construction industry can train and supply an adequate workforce. Crucial to developing reliable forecasts is the collection of accurate and consistent data on which to base projections. This article summarizes research efforts to formally identify and collect quality economic and construction industry data intended for use in a labor forecast model. The methodology used to collect da…
The Impact of Pavement Type and Roughness on Paint Marking Retroreflectivity
This article addresses the impact of asphalt type and roughness on paint pavement marking retroreflectivity. Marking retroreflectivity and pavement roughness data were collected on two-lane highways in North Carolina. A t test was used to analyze the data. It was found that the mean values of the retroreflectivity measurements for the plant mixed pavements are significantly higher than those for the bituminous surface treatment (BST; chip seal) p…
Barriers to Implementation of Unconventional Intersection Designs
Numerous unconventional intersection and interchange designs (UIIDs) exist with documented benefits, but implementation is slow. There are public, professional, and political barriers. Numerous papers explain the benefits of one design or compare designs, but few identify common barriers. This research surveyed transportation professionals to identify the barriers inhibiting the implementation of promising UIIDs and to identify solutions. Enginee…
Finding and Measuring Horizontal Curves in a Large Highway Network
Roadways are continuous elements that consist of straight and curved segments that are of particular interest to transportation agencies because of safety concerns for motorists. An analysis was undertaken on curves to determine the accuracy of using GIS to identify curves. The safety of horizontal curves from a system perspective was also benchmarked to understand curves as a system instead of as isolated roadway features. The automated applicat…
A Control Sign Facility Design to Meet the New FHWA Minimum Sign Retroreflectivity Standards
Minimum sign retroreflectivity standards issued by the Federal Highway Administration (FHWA) on January 29, 2008, have focused the attention of administrators and sign managers on improving the nighttime performance of traffic signs. To predict when a sign will need replacement, an agency will need to know when the retroreflectivity of signs with similar characteristics deteriorate to the minimum level established by the FHWA. Currently in the li…
The Impact of Directionality on Paint Pavement Marking Retroreflectivity
This article addresses paint centerline pavement marking retroreflectivity. The authors collect yellow centerline retroreflectivity data on two-lane highways, taking measurements in two directions. A paired t test on the data shows that there are differences and they are statistically significant. A field study is initiated to investigate the relationship between the direction the marking is painted and the retroreflectivity direction. The key re…
Statistical Validation of the Effect of Lateral Line Location on Pavement Marking Retroreflectivity Degradation
This article examines the effect of lateral location on the degradation of retroreflectivity in thermoplastic pavement-marking systems. The authors examined data collected on North Carolina roads over a 5-year period and conducted a statistical analysis to determine if there was a significant difference in the rates of retroreflectivity degradation between edge lines and center lines. The study concluded that there was statistical evidence that l…
Field Investigation of Highway Sign Damage Rates and Inspector Accuracy
This study sought to create a simulation model to provide the North Carolina Department of Transportation (NCDOT) with recommendations to improve its sign inspection and replacement procedures. This research focuses on two key factors built into the model: (a) the rate at which signs are damaged beyond usefulness based on natural or man-made causes and (b) the accuracy rate of visual sign inspections based on retroreflectivity. The research team …
Alternative Approaches for State Agencies to Address the Proposed Minimum Retroreflectivity Standards
This work aimed to determine, quantify, and present alternative approaches for agencies to meet the Federal Highway Administration's (FHWA) proposed minimum levels of retroreflectivity for signs. This study based these approaches on current North Carolina Department of Transportation sign maintenance practices and sought to minimize the cost and labor required to meet FHWA standards. This article offers four approaches: Nighttime visual inspectio…
Evaluation of Roadway Infrastructure Data Collection Technologies
Due to technological advances in data collection equipment, many transportation agencies are considering the use of mobile mapping systems: data collection vehicles equipped with a Global Positioning System receiver, an inertial navigation system, several digital cameras, and a computer. The host system is driven on a roadway, and data are collected on the fly. These raw data are then processed on a computer using photogrammetric software package…
Field Investigation of Highway Sign Damage Rates and Inspector Accuracy
This study sought to create a simulation model to provide the North Carolina Department of Transportation (NCDOT) with recommendations to improve its sign inspection and replacement procedures. This research focuses on two key factors built into the model: (a) the rate at which signs are damaged beyond usefulness based on natural or man-made causes and (b) the accuracy rate of visual sign inspections based on retroreflectivity. The research team …
Barriers to Implementation of Unconventional Intersection Designs
Numerous unconventional intersection and interchange designs (UIIDs) exist with documented benefits, but implementation is slow. There are public, professional, and political barriers. Numerous papers explain the benefits of one design or compare designs, but few identify common barriers. This research surveyed transportation professionals to identify the barriers inhibiting the implementation of promising UIIDs and to identify solutions. Enginee…
A Control Sign Facility Design to Meet the New FHWA Minimum Sign Retroreflectivity Standards
Minimum sign retroreflectivity standards issued by the Federal Highway Administration (FHWA) on January 29, 2008, have focused the attention of administrators and sign managers on improving the nighttime performance of traffic signs. To predict when a sign will need replacement, an agency will need to know when the retroreflectivity of signs with similar characteristics deteriorate to the minimum level established by the FHWA. Currently in the li…
The Impact of Directionality on Paint Pavement Marking Retroreflectivity
This article addresses paint centerline pavement marking retroreflectivity. The authors collect yellow centerline retroreflectivity data on two-lane highways, taking measurements in two directions. A paired t test on the data shows that there are differences and they are statistically significant. A field study is initiated to investigate the relationship between the direction the marking is painted and the retroreflectivity direction. The key re…
Statistical Validation of the Effect of Lateral Line Location on Pavement Marking Retroreflectivity Degradation
This article examines the effect of lateral location on the degradation of retroreflectivity in thermoplastic pavement-marking systems. The authors examined data collected on North Carolina roads over a 5-year period and conducted a statistical analysis to determine if there was a significant difference in the rates of retroreflectivity degradation between edge lines and center lines. The study concluded that there was statistical evidence that l…
Alternative Approaches for State Agencies to Address the Proposed Minimum Retroreflectivity Standards
This work aimed to determine, quantify, and present alternative approaches for agencies to meet the Federal Highway Administration's (FHWA) proposed minimum levels of retroreflectivity for signs. This study based these approaches on current North Carolina Department of Transportation sign maintenance practices and sought to minimize the cost and labor required to meet FHWA standards. This article offers four approaches: Nighttime visual inspectio…
Evaluation of Roadway Infrastructure Data Collection Technologies
Due to technological advances in data collection equipment, many transportation agencies are considering the use of mobile mapping systems: data collection vehicles equipped with a Global Positioning System receiver, an inertial navigation system, several digital cameras, and a computer. The host system is driven on a roadway, and data are collected on the fly. These raw data are then processed on a computer using photogrammetric software package…
Alternative Approaches for State Agencies to Address the Proposed Minimum Retroreflectivity Standards
This work aimed to determine, quantify, and present alternative approaches for agencies to meet the Federal Highway Administration's (FHWA) proposed minimum levels of retroreflectivity for signs. This study based these approaches on current North Carolina Department of Transportation sign maintenance practices and sought to minimize the cost and labor required to meet FHWA standards. This article offers four approaches: Nighttime visual inspectio…
Statistical Validation of the Effect of Lateral Line Location on Pavement Marking Retroreflectivity Degradation
This article examines the effect of lateral location on the degradation of retroreflectivity in thermoplastic pavement-marking systems. The authors examined data collected on North Carolina roads over a 5-year period and conducted a statistical analysis to determine if there was a significant difference in the rates of retroreflectivity degradation between edge lines and center lines. The study concluded that there was statistical evidence that l…
Field Investigation of Highway Sign Damage Rates and Inspector Accuracy
This study sought to create a simulation model to provide the North Carolina Department of Transportation (NCDOT) with recommendations to improve its sign inspection and replacement procedures. This research focuses on two key factors built into the model: (a) the rate at which signs are damaged beyond usefulness based on natural or man-made causes and (b) the accuracy rate of visual sign inspections based on retroreflectivity. The research team …
The Impact of Directionality on Paint Pavement Marking Retroreflectivity
This article addresses paint centerline pavement marking retroreflectivity. The authors collect yellow centerline retroreflectivity data on two-lane highways, taking measurements in two directions. A paired t test on the data shows that there are differences and they are statistically significant. A field study is initiated to investigate the relationship between the direction the marking is painted and the retroreflectivity direction. The key re…
A Control Sign Facility Design to Meet the New FHWA Minimum Sign Retroreflectivity Standards
Minimum sign retroreflectivity standards issued by the Federal Highway Administration (FHWA) on January 29, 2008, have focused the attention of administrators and sign managers on improving the nighttime performance of traffic signs. To predict when a sign will need replacement, an agency will need to know when the retroreflectivity of signs with similar characteristics deteriorate to the minimum level established by the FHWA. Currently in the li…
Finding and Measuring Horizontal Curves in a Large Highway Network
Roadways are continuous elements that consist of straight and curved segments that are of particular interest to transportation agencies because of safety concerns for motorists. An analysis was undertaken on curves to determine the accuracy of using GIS to identify curves. The safety of horizontal curves from a system perspective was also benchmarked to understand curves as a system instead of as isolated roadway features. The automated applicat…
The Impact of Pavement Type and Roughness on Paint Marking Retroreflectivity
This article addresses the impact of asphalt type and roughness on paint pavement marking retroreflectivity. Marking retroreflectivity and pavement roughness data were collected on two-lane highways in North Carolina. A t test was used to analyze the data. It was found that the mean values of the retroreflectivity measurements for the plant mixed pavements are significantly higher than those for the bituminous surface treatment (BST; chip seal) p…
Barriers to Implementation of Unconventional Intersection Designs
Numerous unconventional intersection and interchange designs (UIIDs) exist with documented benefits, but implementation is slow. There are public, professional, and political barriers. Numerous papers explain the benefits of one design or compare designs, but few identify common barriers. This research surveyed transportation professionals to identify the barriers inhibiting the implementation of promising UIIDs and to identify solutions. Enginee…
An Estimate of Potential Savings From Removing Traffic Signals in a Depopulating Urban Area
A common rule of thumb for signalization in a city is one traffic signal for every 1,000 residents. When a city is depopulating, does this ratio apply when determining how many signals can be removed? The City of Detroit has lost 61% of its population since its peak. If signals were installed to serve the peak population, applying this rule of thumb, 61% of the signal inventory should be able to be removed. An operational analysis was performed o…
Data Collection Opportunities and Challenges for Skilled Construction Labor Demand Forecast Modeling
Forecasting skilled construction labor demand ensures that the construction industry can train and supply an adequate workforce. Crucial to developing reliable forecasts is the collection of accurate and consistent data on which to base projections. This article summarizes research efforts to formally identify and collect quality economic and construction industry data intended for use in a labor forecast model. The methodology used to collect da…
Development and Evaluation of the Dynamic Left Turn Intersection
Dual left turn lanes are typically operated with protected left turn signals, which means extra delay during non-peak hours compared to permissive operation. To reduce this delay, the authors designed, installed, and tested a “dynamic left turn intersection” (DLTi), which is a new way to operate dual left turn lanes. With DLTi, the both lanes are operated with protected phasing during the peak hours when higher capacity is needed, and only the le…
Engineering (12 works) · Transport engineering (11 works) · Computer Science (7 works) · Infrastructure Maintenance and Monitoring (5 works) · Safety Warnings and Signage (5 works) · Business (4 works) · Mathematics (4 works) · Traffic and Road Safety (4 works) · Artificial Intelligence (3 works) · Asphalt Pavement Performance Evaluation (3 works)