  In this paper, we present results of an entrance experiment investigating the
effect of the corridor width in front of a bottleneck on the density. The idea
is based on a previous study suggesting that a guiding system in front of an
entrance can reduce pushing of the waiting people and thus the density at the
entrance. In our study we aim to find out to what extend the corridor width has
an impact on crowding or queuing behavior and with that on the density. The
results of the presented experiment suggest that the transition takes place
between a corridor width of 1.2 m and 2.3 m. The total duration of each
experimental run is not significantly influenced by the corridor width but by
the width of the entrance itself, the number of participants and partly by the
motivation. In general, the density in front of the gate as well as the area of
high density is increased by widening the corridor and by intensifying the
motivation of the participants. However, the results also suggest that also the
number of participants significantly influences the occurrence of pushing and
the level of density.
