Search Results - "Watkins, Kari E."

Why has public transit ridership declined in the United States? by Erhardt, Gregory D., Hoque, Jawad Mahmud, Goyal, Vedant, Berrebi, Simon, Brakewood, Candace, Watkins, Kari E.

“…[Display omitted] •Between 2012 and 2018, bus ridership in the US declined 15% and rail ridership declined 3%.•We identify the factors responsible and quantify…”
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Who’s ditching the bus? by Berrebi, Simon J., Watkins, Kari E.

“…This paper uses stop-level passenger count data in four cities to understand the bus ridership decline between 2012 and 2018. The local characteristics…”
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On bus ridership and frequency by Berrebi, Simon J., Joshi, Sanskruti, Watkins, Kari E.

“…Even before the start of the COVID-19 pandemic, bus ridership in the United States had attained its lowest level since 1973. If transit agencies hope to…”
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A real-time bus dispatching policy to minimize passenger wait on a high frequency route by Berrebi, Simon J., Watkins, Kari E., Laval, Jorge A.

“…[Display omitted] •Minimizing the sum of squared headways at max frequency minimizes passenger wait.•We derived structural properties of an optimal policy by…”
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Response willingness in consecutive travel surveys: an investigation based on the National Household Travel Survey using a sample selection model by Wang, Xinyi, Shaw, F. Atiyya, Mokhtarian, Patricia L., Watkins, Kari E.

“…Declining survey response rates have increased the costs of travel survey recruitment. Recruiting respondents based on their expressed willingness to…”
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Comparing bus holding methods with and without real-time predictions by Berrebi, Simon J., Hans, Etienne, Chiabaut, Nicolas, Laval, Jorge A., Leclercq, Ludovic, Watkins, Kari E.

“…•Holding methods used in practice and recommended in the literature are compared.•The trade-off between headway stability and holding time is tested for each…”
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Improving the performance of headway control tools by using individual driving speed data by Martínez-Estupiñan, Yerly, Delgado, Felipe, Muñoz, Juan Carlos, Watkins, Kari E.

“…Fleet control operation tools for high frequency bus service seek to maintain headway regularity between consecutive vehicles. Almost always, these tools…”
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Combining disparate surveys across time to study satisfaction with life: the effects of study context, sampling method, and transport attributes by Wang, Xinyi, Shaw, F. Atiyya, Mokhtarian, Patricia L., Circella, Giovanni, Watkins, Kari E.

“…Satisfaction with life is a self-reported measure of the quality of life that has become a critical societal indicator extensively used for the evaluation and…”
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Have Paved Trails and Protected Bike Lanes Led to More Bicycling in Atlanta?: A Generalized Synthetic-Control Analysis by Garber, Michael D., Flanders, W. Dana, Watkins, Kari E., Lobelo, Felipe, Kramer, Michael R., McCullough, Lauren E.

“…Bicycling is an important form of physical activity in populations. Research assessing the effect of infrastructure on bicycling with high-resolution…”
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Supplementing transportation data sources with targeted marketing data: Applications, integration, and internal validation by Shaw, F. Atiyya, Wang, Xinyi, Mokhtarian, Patricia L., Watkins, Kari E.

“…Unlike many third-party data sources, targeted marketing (TM) data constitute holistic datasets, with disaggregate variables – ranging from socioeconomic and…”
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Translating research to practice: Implementing real-time control on high-frequency transit routes by Berrebi, Simon J., Crudden, Sean Óg, Watkins, Kari E.

“…On high-frequency routes, buses tend to bunch together, creating gaps in service and causing undue passenger waiting time. There are many approaches to solving…”
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Comparing bicyclists who use smartphone apps to record rides with those who do not: Implications for representativeness and selection bias by Garber, Michael D., Watkins, Kari E., Kramer, Michael R.

“…Increasing population levels of cycling has the potential to improve public health by increasing physical activity. As cyclists have begun using smartphone…”
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At-risk-measure Sampling in Case–Control Studies with Aggregated Data by Garber, Michael D., McCullough, Lauren E., Mooney, Stephen J., Kramer, Michael R., Watkins, Kari E., Lobelo, R.L. Felipe, Flanders, W. Dana

“…Transient exposures are difficult to measure in epidemiologic studies, especially when both the status of being at risk for an outcome and the exposure change…”
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Simulating the effect of strategies to increase transit ridership by reallocating bus service: Two case studies by Erhardt, Gregory D., Goyal, Vedant S., Kressner, Josephine, Berrebi, Simon J., Brakewood, Candace, Watkins, Kari E.

“…We evaluate three strategies that transit operators might consider to increase ridership: a) increasing service on bus routes serving the highest share of…”
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Bicycle infrastructure and the incidence rate of crashes with cars: A case-control study with Strava data in Atlanta by Garber, Michael D., Watkins, Kari E., Flanders, W. Dana, Kramer, Michael R., Lobelo, R.L. Felipe, Mooney, Stephen J., Ederer, David J., McCullough, Lauren E.

“…Bicycling has individual and collective health benefits. Safety concerns are a deterrent to bicycling. Incomplete data on bicycling volumes has limited…”
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Estimating the effect of vehicle speeds on bicycle and pedestrian safety on the Georgia arterial roadway network by Arias, Daniel, Ederer, David, Rodgers, Michael O., Hunter, Michael P., Watkins, Kari E.

“…•The highest speeds (85th–50th percentile) are informative for predicting walking and cycling crashes.•The lowest speeds (50th–15th percentile) are less…”
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Have paved trails and protected bike lanes led to more bicycling in Atlanta? A generalized synthetic-control analysis by Garber, Michael D., Flanders, W. Dana, Watkins, Kari E., Lobelo, R.L. Felipe, Kramer, Michael R., McCullough, Lauren E.

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Comparing Transit Agency Peer Groups using Cluster Analysis by Ederer, David, Berrebi, Simon, Diffee, Chandler, Gibbs, Taylor, Watkins, Kari E.

“…Transit ridership has decreased steadily each year from 2014 to 2017 despite increasing urban populations and transit investment. Several analyses have…”
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Case Study using Probe Vehicle Speeds to Assess Roadway Safety in Georgia by Ederer, David J., Rodgers, Michael O., Hunter, Michael P., Watkins, Kari E.

“…Speed is a primary risk factor for road crashes and injuries. Previous research has attempted to ascertain the relationship between individual vehicle speeds,…”
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Cross-checking automated passenger counts for ridership analysis by Berrebi, Simon J., Joshi, Sanskruti, Watkins, Kari E.

“…Due to concerns about data quality, Automated Passenger Counting technology has rarely been used to analyze local ridership trends. This paper presents a novel…”
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