A STUDY OF THE INFLUENCE OF STOPPED DELAY ON DRIVER GAP ACCEPTANCE BEHAVIOUR
A STUDY OF THE INFLUENCE OF STOPPED DELAY ON DRIVER GAP ACCEPTANCE BEHAVIOUR
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Date
1987-01
Authors
SAMA, GEORGE NKENG
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Abstract
The influence of stopped delay on driver gap acceptance
behaviour is investigated. Gap rejection/acceptance data
collected for minor road drivers executing left-turning
manoeuvres at two separate priority intersections are
analysed. The mean critical gapfit (C) and its variance (O2)
are separately estimated from the aggregated data and from
abstractions of the data based on the durations of stopped
delay.
It has been found that at shorter durations of stopped
delay by minor road drivers, the mean critical gaps obtained
are higher than those obtained when minor road drivers
experience higher durations of delay. A statistical
comparison shows that at the %% level of significance,
the mean critical gaps estimated from the disaggregated
data are significantly different from the value obtained
from the aggregated data, the values being in reasonable
agreement when the mean delay to minor road drivers is
about 30s.
The practical significance of these differences in
mean critical gaps as reflected in the computed values of
the minor road capacity is also investigated. It has been
found that the minor road capacity will be slightly underestimated
during periods when minor road drivers experience
high durations of stopped delay and seriously over-estimated
at situations when durations of stopped delay are short.
Empirical equations have been derived relating the
mean critical gap to the mean delay, average main flow
and the minor road capacity.
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A STUDY OF THE INFLUENCE OF STOPPED DELAY ON DRIVER GAP ACCEPTANCE BEHAVIOUR, A STUDY OF THE INFLUENCE OF STOPPED DELAY ON DRIVER GAP ACCEPTANCE BEHAVIOUR