“…In past, numerous investigations on traffic flow (Bazaras et al, 2008;Basu & Maitra, 2007;Junevicius & Bogdevicius, 2009;Kalasova & Stacho, 2006;Prentkovskis et al, 2007) were performed to understand different aspects of it. Furthermore, there were studies which focused on congestion alleviation measures (Triantis et al, 2011), assessment of travel decisions in uncertain conditions (Ryley & Zany, 2013), development of technology to control speed in real time (Jimenez & Monitel, 2014), and assessment of transportation quality and traffic characteristics (Hamilton et al, 2012;Zezelj, 2013;Maletin & Tubic, 2013). However, none of these aforementioned investigations addressed the possibility of abrupt change in congestion due to internal or external factors.…”