2013 Session: 815

• Geographic Distribution of E-shopping: Application of Structural Equation Models in the Twin Cities
  Abstract: The proliferation of internet shopping has imposed enormous pressure on traditional stores. Few studies have examined the geographic distribution of online buyers and its implications on retail development. Using 585 internet users in the Minneapolis-St. Paul metropolitan area, this study develops structural equation models to test two competing hypotheses regarding the connections between spatial attributes and e-shopping: diffusion of innovation and efficiency. The results demonstrate that the influence of shopping accessibility on e-shopping is not uniform, but depends on the locations in metropolitan areas. Specifically, internet users living in urban and/or high shopping accessibility areas tend to purchase online more often than their counterparts in other areas because the former are better educated and use the internet more heavily than the latter. However, low shopping accessibility in exurban areas does promote the usage of e-shopping, compared to exurban areas with relatively high shopping accessibility.
  Authors: Cao, Xinyu; Chen, Qian; Choo, Sangho
  Authors: Cao, Xinyu; Chen, Qian; Choo, Sangho
  Year: 2013
  Document Type: Paper
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-0474
• Assessing Impacts of Teleworking Policy on Crash Occurrence: Case of Flanders, Belgium
  Abstract: Travel demand management (TDM) consists of a variety of policy measures that affect the effectiveness of transportation systems by changing travel behavior. The primary objective of such TDM strategies is not to improve traffic safety, although their impact on traffic safety should not be neglected. The main purpose of this study is to simulate the traffic safety impact of conducting a teleworking scenario (i.e. 5% of the working population engages in teleworking) in the study area, Flanders, Belgium. Since TDM strategies are usually conducted at a geographically aggregated level, crash prediction models (CPMs) should also be developed at an aggregate level. Given that crash occurrences are often spatially heterogeneous and are affected by many spatial variables, the existence of spatial correlation in the data is also examined. The results indicate the necessity of accounting for the spatial correlation when developing crash prediction models. Therefore zonal crash prediction models (ZCPMs) within the Geographically Weighted Generalized Linear Modeling (GWGLM) framework are developed to incorporate the spatial variations in association between the number of crashes (NOCs) (including fatal, severe and slight injury crashes recorded between 2004 and 2007) and other explanatory variables. Different exposure, network and socio-demographic variables of 2200 traffic analysis zones (TAZs) are considered as predictors of crashes. An activity-based transportation model framework is adopted to produce detailed exposure metrics. This enables to conduct a more detailed and reliable assessment while TDM strategies are inherently modeled in the activity-based models. In this study, several ZCPMs with different severity levels and crash types are developed to predict the NOCs for both the null and the teleworking scenario. The models show a considerable traffic safety benefit of conducting the teleworking scenario due to its impact on the reduction of total Vehicle Kilometers Traveled (VKT) by 3.15%. Implementing the teleworking scenario is predicted to reduce the annual VKT by 1.426 billion and total NOCs to decline by 2.62%.
  Authors: Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
  Authors: Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
  Year: 2013
  Document Type: Paper
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-1050
• Analysis of the Effects of Activities While Traveling on Travelers' Sentiment
  Abstract: Travel involves various onboard activities. The emergence of ICT (Information and Communication Technologies) has increased such activities and added new dimensions to them. This study intends to analyze the effects of various onboard activities including the use of ICT on trip-makers’ sentiments during trips. This study employs the Daily Reconstruction Method to examine whether or not the feelings that trip-makers have are positive or negative. Also, the Seemingly Unrelated Probit Regression and Univariate Probit models are used to analyze the relationship between onboard feelings and onboard activities by travel mode. This study finds that onboard activities using ICT devices are valued among trip-makers and tend to have positive effects on their onboard feelings. However, this study also finds that the effects are not homogenous. The findings indicate that emerging ICT related onboard activities can be instrumental in improving people’s travel experience and in converting choice automobile users to choice transit riders.
  Authors: Rhee, Kyoung-ah; Kim, Joon-Ki; Lee, Backjin; Kim, Sungyop; Lee, Young-Ihn
  Authors: Rhee, Kyoung-ah; Kim, Joon-Ki; Lee, Backjin; Kim, Sungyop; Lee, Young-Ihn
  Year: 2013
  Document Type: Paper
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3922
• Estimation of Changes in Rail Ridership Through Onboard Survey: Did Free Wi-Fi Make a Difference to Amtrak's Capitol Corridor Service?
  Abstract: Amtrak launched free Wi-Fi service on the California Capital Corridor (CC) on November 28, 2011. To study the impact of free Wi-Fi on ridership, an on-board survey was conducted in March, 2012. Through the descriptive analysis, several conventional factors (trip frequency in 2011, trip purpose, station to station distance and employment) as well as Wi-Fi are found to have some impact on the expected trip frequency in 2012. A linear regression model based on the specification of three market segments was built to better understand the impact of selected variables on the expected number of CC trips in 2012. According to the model results, past trip frequency is the most important predictor of future frequency. The impact of free Wi-Fi on 2012 trip frequency is statistically significant and positive for the two (lower-frequency and higher-frequency) continuing rider segments, albeit modest in magnitude. Using the estimated parameters from the model, the number of trips the sample expects to make in 2012 is 1.3% higher than would have been the case without free Wi-Fi. Furthermore, the effect clearly differs among the three segments: lower-frequency continuing riders (those using CC less than once a week in 2011) expect to make 8.5% more trips than if Wi-Fi were not available, whereas the corresponding number for higher-frequency continuing riders (using CC once a week or more in 2011) is 0.7%. Wi-Fi has no statistically significant impact on the expected 2012 trip frequency for new riders.
  Authors: Dong, Zhi; Mokhtarian, Patricia L.; Circella, Giovanni
  Authors: Dong, Zhi; Mokhtarian, Patricia L.; Circella, Giovanni
  Year: 2013
  Document Type: Paper
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3946
• Geographic Distribution of E-shopping: Application of Structural Equation Models in the Twin Cities
  Authors: Cao, Xinyu
  Authors: Cao, Xinyu
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-0474
• Assessing Impacts of Teleworking Policy on Crash Occurrence: Case of Flanders, Belgium
  Authors: Pirdavani, Ali
  Authors: Pirdavani, Ali
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-1050
• Assessing Impacts of Teleworking Policy on Crash Occurrence: Case of Flanders, Belgium
  Authors: Bellemans, Tom
  Authors: Bellemans, Tom
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-1050
• Estimation of Changes in Rail Ridership Through Onboard Survey: Did Free Wi-Fi Make a Difference to Amtrak's Capitol Corridor Service?
  Authors: Dong, Zhi
  Authors: Dong, Zhi
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3946
• Analysis of the Effects of Activities While Traveling on Travelers' Sentiment
  Authors: Rhee, Kyoung-ah
  Authors: Rhee, Kyoung-ah
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3922
• Analysis of the Effects of Activities While Traveling on Travelers' Sentiment
  Authors: Lee, Backjin
  Authors: Lee, Backjin
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3922
• Analysis of the Effects of Activities While Traveling on Travelers' Sentiment
  Authors: Kim, Sungyop
  Authors: Kim, Sungyop
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3922
• Analysis of the Effects of Activities While Traveling on Travelers' Sentiment
  Authors: Lee, Young-Ihn
  Authors: Lee, Young-Ihn
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3922
• Analysis of the Effects of Activities While Traveling on Travelers' Sentiment
  Authors: Kim, Joon-Ki
  Authors: Kim, Joon-Ki
  Year: 2013
  Document Type: Presentation
  Subject: Data and Information Technology; Planning and Forecasting
  Session: 815
  Paper Number: 13-3922