The study of value of activity time on the weekday and weekend by using activity-based approach

• Main Authors: Hao-ChingHsia, 夏晧清
• Other Authors: Kuang-Yih Yeh
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/39779493775871004163

博士 === 國立成功大學 === 都市計劃學系碩博士班 === 101 === The value of time is an essential determinant in the benefit assessment of project investment. Several previous studies examined time value based on trip-based approach through the travel demand model, such as route choice model or mode choice model. However, the time value estimated in those studies is only regarded as value of travel time, but not value of activity time. In order to capture the benefit induced by project investment toward individuals sufficiently and examine the essence of time value, it is necessary to rethink this issue out of the traditional trip-based approach frame. In this case, activity-based approach becomes a better alternative. This study has examined the individual’s activity time allocation behavior on a weekday and a weekend day and the corresponding value of activity time based on activity-based approach. We propose a model in which individual’s time allocation behavior is affected by individual’s psychological evaluation toward an activity. The indicators of psychological evaluation toward an activity on a weekday include importance and priority. On the other hand, the indicators on a weekend day include importance, priority, and weekend preference. The individual’s time use data on a weekday / weekend day and psychological evaluation toward every activity were collected by activity diary survey. Individual’s daily activities have been classified into the following six groups: (1) physical care activity, (2) work activity, (3) family care activity, (4) homemaking activity, (5) leisure activity, and (6) social activity. Finally, the individual’s activity time allocation model has been established by econometric model and then the average value of time of each activity (including 5 items) has been estimated via this model except for work activity. The sampling workers residing in former Tainan city including the East district, Central-West district, South district, North district, Anping district, and Annan district were analytical subjects. This study employed activity diary to collect the data of individual’s activity time allocation both on a weekday and a weekend day as well as the psychological evaluation toward every activity. The time use data of a weekday / weekend day and individual’s psychological evaluation data are simultaneously employed to establish the activity time allocation model on a weekday / weekend day. The number of sample for the activity time allocation model of a weekday is 162. On the other hand, the number of sample for the activity time allocation model of a weekday is 152. The results show that the value of weekday activity time can be represented by 5% trimmed mean of activity time value. According to the mean of activity time value, the rank of each activity can be shown as follows: leisure activity (2.64 NT/Min.) 〉 family care activity (0.66 NT/Min.) 〉 physical care activity (0.51 NT/Min.) 〉 homemaking activity (0.04 NT/Min.) 〉 social activity (0.02 NT/Min.). In the case of the weekend activity time value, according to the 5% trimmed mean of activity time value, the rank of each activity can be shown as follows: leisure activity (6.11 NT/Min.) 〉 family care activity (6.08 NT/Min.) 〉 physical care activity (4.58 NT/Min.) 〉 social activity (0.77 NT/Min.) 〉 homemaking activity (0.27 NT/Min.). It is recognized that the estimation of value of activity time is an important issue theoretically and practically. The specific contributions of this study on the estimation of value of activity time are: (1) the values of activity time of different activities can be estimated in this study. (2) the value of weekend day activity time which was merely estimated in previous studies can be estimated in this study. (3) individual’s psychological evaluations toward different activities are involved in the estimation of individual’s values of activity time. The values of activity time can be implemented properly to assess the benefits which are induced by project investment.