  Effective evacuation policies in emergency situations are important to save
lives. To develop such policies, simulation models based on cellular automata
have been used for crowd evacuation dynamics. In most previous studies of crowd
evacuations, an evacuee is represented by a $1 \times 1$ square. However, a
rectangle ($1 \times 2$) representation is more suitable for such models than
the square representation because of evacuees' shoulder width. The rectangle
representation gives two new features to evacuees' behaviors: moving sideways
and turning. We study the effects of these behaviors on crowd evacuation
dynamics. Hence, we constructed a cellular automaton model where evacuees whose
shoulder widths are $1 \times 2$ try to escape from a room in an emergency
situation. The simulation results showed that turning behavior can make the
evacuation time shorter and there is an optimal turning rate for the crowd
evacuation. Our findings contribute to the effective control of evacuees in
emergency situations.
