Data Analysis Using SAS Enterprise Guide

Meyers, Lawrence S.; Gamst, Glenn; Guarino, A. J.

doi:10.1017/cbo9780511804786

Cited by 178 publications

(255 citation statements)

References 68 publications

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“…The objective here was to use the estimated severe and extremely severe vehicle-to-pedestrian conflicts to quantify the effects of LPI implementation after controlling for pedestrian and turning vehicle volumes. Generalized linear models with a negative binomial error structure and a form similar to that used for crash frequency models were estimated using SAS Enterprise Guide 7.1 (Meyers et al 2009). Four models were developed, as described below, with Models 1 to 3 based on severe conflicts and Model 4 on extremely severe conflicts.…”

Section: Estimation Of Statistical Models For Vehicle-to-pedestrian C...mentioning

confidence: 99%

Using microsimulation to investigate the optimal deployment of leading pedestrian intervals at signalized intersections

Hasanpour

Persaud

2022

TSR

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The provision of leading pedestrian intervals (LPI) has emerged in recent years to achieve safety equitability for pedestrians at signalized intersections. LPI is a way to provide the pedestrian walk interval a few seconds before starting the circular green indication to adjacent parallel traffic. Although the safety benefit of LPI is indisputable, there are fundamental questions that need to be addressed for the optimal deployment of this strategy. First, can significant safety benefits for pedestrians be achieved while maintaining a satisfactory operational level of service for vehicles? Second, what are the application circumstances most conducive to achieving the greatest safety benefits for pedestrians? Third, how can a jurisdiction effectively assess contemplated treatments to achieve optimal deployment? This exploratory paper addresses these three fundamental questions by reviewing relevant literature before presenting the research from the application of microsimulation to fifteen Toronto intersections where LPIs have been implemented. The microsimulation involved using a recently released module for accommodating LPI phasing in the PTV Vistro software. To directly address the first and second questions, vehicle-to-pedestrian conflicts and vehicle delay were estimated for ten scenarios that allowed for the provision of, and variability in the LPI interval, right turn volumes, right turn on red provision, pedestrian and vehicle volumes, and crossing width. The results suggest that significant safety benefits can be achieved for pedestrians while maintaining a satisfactory level of service for vehicles. They further suggest that potential LPI deployments need to be assessed on a case-by-case basis since the effects of LPI can be significantly impacted by the influencing factors investigated. Statistical models were developed to quantify the effects of LPI implementation on vehicle-to-pedestrian conflicts after controlling for pedestrian and turning vehicle volumes. The results of this exploratory investigation, though interesting and consistent with the literature and logical considerations, may not be generalizable in a strict sense. Nevertheless, the study does provide a blueprint for investigating the design, traffic, and operational factors that can influence the impact of LPI on pedestrian safety without detrimentally impacting vehicle level of service.

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Section: Estimation Of Statistical Models For Vehicle-to-pedestrian C...mentioning

confidence: 99%

Using microsimulation to investigate the optimal deployment of leading pedestrian intervals at signalized intersections

Hasanpour

Persaud

2022

TSR

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“…Hierarchical cluster analysis was subsequently performed several times on the 19 items that measured psychological values and time use patterns to identify tourist clusters according to the psychological values and time use patterns. Hierarchical clustering was more appropriate than partitioning such as k -means clustering given that there was no pre-specified number of clusters (Meyers, Gamst, and Guarino 2013). Hierarchical cluster analysis was employed to provide better insights into the similarities and differences between different tourist groups.…”

Section: Findings and Discussionmentioning

confidence: 99%

Tourist Perception of the Value of Time on Holidays: Implications for the Time Use Rebound Effect and Sustainable Travel Practice

Kim

Filimonau

Dickinson

2021

Journal of Travel Research

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Technological solutions to achieve energy efficiency and carbon reduction in tourism are unlikely to be sufficient alone. This is partly because of the rebound effect (RE) where consumer behavior can absorb some of or all the energy efficiency gains. Time savings from time-efficient technologies can intensify energy consumption, leading to the time use rebound effect (TRE). Research suggests that the TRE in tourism can be high, especially in relation to tourist travel, but its understanding is limited. This study aims to provide empirical evidence of the TRE by categorizing tourist groups that are most prone to its occurrence. An exploratory sequential mixed methods approach is employed. Key factors that influence the potential TRE occurrence include socio-demographic characteristics, holiday preferences, time/money availability, time perception/attitudes, and time use patterns on holiday. The “Busy explorer” cluster of tourists is most likely to show TREs. Implications and suggestions for future research are outlined.

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“…The results were analysed using IBM Statistical Package for Social Science Software (25th version) [ 23 ] for descriptive and inferential statistical analysis to assess the following outcomes: decrease in scores on the Conners 3 scale and improvements in BIA and TOL test scores.…”

Section: Methodsmentioning

confidence: 99%

IAmHero: Preliminary Findings of an Experimental Study to Evaluate the Statistical Significance of an Intervention for ADHD Conducted through the Use of Serious Games in Virtual Reality

Schena¹,

Garotti²,

D’Alise³

et al. 2023

IJERPH

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The use of new technologies, such as virtual reality (VR), represents a promising strategy in the rehabilitation of subjects with attention-deficit/hyperactivity disorder (ADHD). We present the results obtained by administering the IAmHero tool through VR to a cohort of subjects with ADHD between 5 and 12 years of age. The trial time was approximately 6 months. In order to assess the beneficial effects of the treatment, standardised tests assessing both ADHD symptoms and executive functions (e.g., Conners-3 scales) were administered both before and at the end of the sessions. Improvements were observed at the end of treatment in both ADHD symptoms (especially in the hyperactivity/impulsivity domain) and executive functions. One of the strengths of the VR approach is related above all to the acceptability of this tool and its flexibility. Unfortunately, to date, there are still few studies on this topic; therefore, future studies are essential to expand our knowledge on the utility and benefits of these technologies in the rehabilitation field.

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Data Analysis Using SAS Enterprise Guide

Cited by 178 publications

References 68 publications

Using microsimulation to investigate the optimal deployment of leading pedestrian intervals at signalized intersections

Using microsimulation to investigate the optimal deployment of leading pedestrian intervals at signalized intersections

Tourist Perception of the Value of Time on Holidays: Implications for the Time Use Rebound Effect and Sustainable Travel Practice

IAmHero: Preliminary Findings of an Experimental Study to Evaluate the Statistical Significance of an Intervention for ADHD Conducted through the Use of Serious Games in Virtual Reality

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