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Viewing report
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ADVANCED PLANNING MODEL FOR SPECIAL USE LANES. Edition No. 1
VDM Publishing House, Oct 2008, Pages: 140
The question of effective utilization of Special Use
Lanes (SULs) is often addressed in terms of persons
carried, rather than vehicles carried. However,
this triggers a more fundamental question, namely
what is the underlying upper limit on HOV throughput
(or “capacity”), given the factors identified in
data analysis within this work? Those factors are
to a large extent driven by the OD pattern on the
facility, which was always known as important but
was not accessible enough to be an
explicit “prevailing condition”. The factors that
are investigated in this research are: (1) high
volumes on the Adjacent Transfer Lane which prevent
access to and from the SUL, (2) barrier-separated
SUL lanes which may impede access to desired exit
ramps, (3) conflicting flow patterns, and (4) “hot
spots” that develop near ramps and SUL access/egress
points. The state-of-the-art in SUL research is
advanced in this work by (a) studying the effects of
the controlling mechanisms on SUL capacity using an
extensive data base from Florida and (b) by
developing a mathematical model for a facility with
a Special Use Lane.
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