Abstract:
When signal changes from green to yellow at a signalized intersection, often drivers are
caught in two minds, whether to cross the intersection or stop at the stop line. Which might
lead to right angle collision or rear end collision, when a driver makes an erroneous decision.
The area in which the driver is caught in two minds is termed as dilemma zone or indecision
zone. Understanding the driver behaviour within the indecisive zone can help in improving
the efficiency and safety at the intersections. Most of the studies in the literature have
investigated the dilemma zone driving behaviour in homogeneous traffic conditions. Traffic
in developing countries like India is heterogeneous containing various vehicle types, where
vehicles vary in their physical dimensions and dynamic characteristics. Heterogeneity' results
in the variability of approach speeds among vehicle types and the acceleration/deceleration
capability of the vehicles. Driver behaviour is much more complex in mixed traffic
conditions and the research findings cannot be transferred/applied directly. This study
analyzes the stop/go behaviour of the drivers at the signalized intersection under mixed traffic
conditions from a video based field study. The study findings will be useful in enhancing the
safety and efficiency of the signalized intersections.
