174 Copyright © 2015, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 9 DOI: 10.4018/978-1-4666-8473-7.ch009 The Impact of Traffc Information Acquisition on the Traffc Conditions of the Athens Greater Area ABSTRACT The main objective of this article is to gain fundamental understanding on the efect of real time infor- mation acquisition, on the trafc conditions of the Athens greater area. Activity scheduling is a dynamic process, where individuals often need to modify their schedule, as a result of new insights. Research so far hasn’t analyzed the efect of trafc information acquisition, in activity scheduling, although several studies have been conducted to capture the factors that infuence the rescheduling of activities. An inte- grated latent variable model has been estimated, that predicts the probability of rescheduling activities as a function of fexibility, mode choice constraints and travel information. The analysis of the results indicates that one of the biggest impacts of trafc information acquisition is refected in the reschedul- ing of activities. Therefore, trafc information not only can signifcantly improve the travel experience of individuals but may directly afect the performance of the transportation system. INTRODUCTION After many years of Advanced Traveler Informa- tion Systems (ATIS) research, and many successful (and less successful) implementations, there is today a considerable amount of knowledge accu- mulated on the subject. The research community has generally acknowledged that traffic informa- tion influence, more or less, travelers’ choice behavior (Polydoropoulou, & Ben-Akiva, 1999; Hato, Taniguchi, Sugie, Kuwahara, & Morita, 1999; Tsirimpa, Polydoropoulou, & Antoniou, 2007; Casas, & Kwan 2007; Choocharukul, 2008; Zhang, Shen, & Clifton, 2008; Politis, Papaioan- nou, Basbas, & Dimitriadis, 2010). However, the majority of the studies that have been conducted Athena Tsirimpa University of the Aegean, Greece Amalia Polydoropoulou University of the Aegean, Greece