Transportation Research Record: Journal of the Transportation Research Board, 2015
In 2013, the City of Oakland, California, implemented a green shared lane (i.e., super sharrow) t... more In 2013, the City of Oakland, California, implemented a green shared lane (i.e., super sharrow) treatment, which consisted of a continuous band of green color on the pavement in conjunction with shared lane markings (i.e., sharrows) as an experimental traffic control device. The implementation was an attempt to improve traffic operations on a multilane urban roadway frequented by cyclists but for which geometric constraints prevented installation of dedicated bicycle lanes. The purpose of the experiment was to promote ( a) safe and legal lane positioning by cyclists and ( b) safe and legal passing by motorists. Through statistical analysis, the effects of the green band (i.e., green shared lane) on user behavior were isolated for comparison with the effects of no bikeway striping and standard sharrows. The key findings were ( a) the green shared lane led cyclists to ride farther from parked cars (i.e., outside of the door zone) than they did with standard sharrows; ( b) standard sha...
Small-scale fisheries management: frameworks and approaches for the developing world
This chapter discusses the origins, theory, design and implementation of adaptive management in s... more This chapter discusses the origins, theory, design and implementation of adaptive management in small-scale fisheries.
We report on the preliminary results of a three-year monitoring campaign of Galactic and Magellan... more We report on the preliminary results of a three-year monitoring campaign of Galactic and Magellanic LBVs with both moderate and high resolution spectroscopy. We have collected more than 500 moderate-resolution spectra of 20 stars in the red portion of the optical spectrum, which includes the wind-sensitive transitions of H$\alpha$ and He I 5876 and 6678 Angstroms. We summarize our detailed
AGN, such as blazars, are most often observed during flare states, primarily due to ease of detec... more AGN, such as blazars, are most often observed during flare states, primarily due to ease of detection. We report microvariability observations of one blazar, however, while in a historically low state. Comparisons of the amplitude of the variability between high and low states are made. These observations strongly suggest that the relativistic jet associated with the central source of this
Transportation Research Record: Journal of the Transportation Research Board, 2013
Two innovative bicycle facilities were installed in Washington, D.C., during 2010 by the District... more Two innovative bicycle facilities were installed in Washington, D.C., during 2010 by the District Department of Transportation: buffered center median bicycle lanes on Pennsylvania Avenue, NW, and a two-way cycle track on 15th Street, NW. Both facilities included dedicated road space with buffers between bicyclists and motor vehicles, signal control, and signs and pavement markings. The facilities were designed to increase safety, comfort, and convenience for cyclists. This paper presents the results of a comprehensive study that evaluated the facilities to understand how well they worked for cyclists, motorists, and pedestrians in terms of safety and level of service (LOS) and how they affected behavior and attitudes. The study found that bicycle LOS improved and that bicycle volume on those corridors nearly quadrupled, well above the rate of citywide bicycle use. Motor vehicle LOS was largely unaffected. Signal progression was mixed for bicyclists: contraflow travel on the one-way...
Transportation Research Record: Journal of the Transportation Research Board, 2013
Cities throughout the United States are increasingly interested in the design of bicycle faciliti... more Cities throughout the United States are increasingly interested in the design of bicycle facilities to attract new riders and improve the comfort of existing riders. In particular, transportation agencies increasingly use treatments such as cycle tracks, buffered bike lanes, and colored pavement to supplement or replace traditional facilities (e.g., bike lanes). To respond to this trend, transportation professionals require evaluation metrics that effectively assess design options and provide decision-support in the choice of bicycle facilities that best match local context. Recent research has produced several bicycle evaluation tools [e.g., bicycle level of service (BLOS)] that attempt to fill this need. This paper presents the results of a comprehensive, real-world comparison of three leading bicycle evaluation tools: Highway Capacity Manual 2010 (HCM) BLOS, Danish Road Directorate BLOS, and the San Francisco, California, Bicycle Environmental Quality Index. Each evaluation tool ...
Transportation Research Record: Journal of the Transportation Research Board, 2015
In 2013, the City of Oakland, California, implemented a green shared lane (i.e., super sharrow) t... more In 2013, the City of Oakland, California, implemented a green shared lane (i.e., super sharrow) treatment, which consisted of a continuous band of green color on the pavement in conjunction with shared lane markings (i.e., sharrows) as an experimental traffic control device. The implementation was an attempt to improve traffic operations on a multilane urban roadway frequented by cyclists but for which geometric constraints prevented installation of dedicated bicycle lanes. The purpose of the experiment was to promote ( a) safe and legal lane positioning by cyclists and ( b) safe and legal passing by motorists. Through statistical analysis, the effects of the green band (i.e., green shared lane) on user behavior were isolated for comparison with the effects of no bikeway striping and standard sharrows. The key findings were ( a) the green shared lane led cyclists to ride farther from parked cars (i.e., outside of the door zone) than they did with standard sharrows; ( b) standard sha...
Small-scale fisheries management: frameworks and approaches for the developing world
This chapter discusses the origins, theory, design and implementation of adaptive management in s... more This chapter discusses the origins, theory, design and implementation of adaptive management in small-scale fisheries.
We report on the preliminary results of a three-year monitoring campaign of Galactic and Magellan... more We report on the preliminary results of a three-year monitoring campaign of Galactic and Magellanic LBVs with both moderate and high resolution spectroscopy. We have collected more than 500 moderate-resolution spectra of 20 stars in the red portion of the optical spectrum, which includes the wind-sensitive transitions of H$\alpha$ and He I 5876 and 6678 Angstroms. We summarize our detailed
AGN, such as blazars, are most often observed during flare states, primarily due to ease of detec... more AGN, such as blazars, are most often observed during flare states, primarily due to ease of detection. We report microvariability observations of one blazar, however, while in a historically low state. Comparisons of the amplitude of the variability between high and low states are made. These observations strongly suggest that the relativistic jet associated with the central source of this
Transportation Research Record: Journal of the Transportation Research Board, 2013
Two innovative bicycle facilities were installed in Washington, D.C., during 2010 by the District... more Two innovative bicycle facilities were installed in Washington, D.C., during 2010 by the District Department of Transportation: buffered center median bicycle lanes on Pennsylvania Avenue, NW, and a two-way cycle track on 15th Street, NW. Both facilities included dedicated road space with buffers between bicyclists and motor vehicles, signal control, and signs and pavement markings. The facilities were designed to increase safety, comfort, and convenience for cyclists. This paper presents the results of a comprehensive study that evaluated the facilities to understand how well they worked for cyclists, motorists, and pedestrians in terms of safety and level of service (LOS) and how they affected behavior and attitudes. The study found that bicycle LOS improved and that bicycle volume on those corridors nearly quadrupled, well above the rate of citywide bicycle use. Motor vehicle LOS was largely unaffected. Signal progression was mixed for bicyclists: contraflow travel on the one-way...
Transportation Research Record: Journal of the Transportation Research Board, 2013
Cities throughout the United States are increasingly interested in the design of bicycle faciliti... more Cities throughout the United States are increasingly interested in the design of bicycle facilities to attract new riders and improve the comfort of existing riders. In particular, transportation agencies increasingly use treatments such as cycle tracks, buffered bike lanes, and colored pavement to supplement or replace traditional facilities (e.g., bike lanes). To respond to this trend, transportation professionals require evaluation metrics that effectively assess design options and provide decision-support in the choice of bicycle facilities that best match local context. Recent research has produced several bicycle evaluation tools [e.g., bicycle level of service (BLOS)] that attempt to fill this need. This paper presents the results of a comprehensive, real-world comparison of three leading bicycle evaluation tools: Highway Capacity Manual 2010 (HCM) BLOS, Danish Road Directorate BLOS, and the San Francisco, California, Bicycle Environmental Quality Index. Each evaluation tool ...
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