WZSC Glossary
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Object MarkerA device used to mark obstructions within or adjacent to the
roadway. | |
Occupancy Requirement | |
Occupant | |
Open-Road ETC LaneA non-attended lane that is designed to allow toll payments to be
electronically collected from vehicles traveling at
normal highway speeds.
Open-Road ETC lanes are
typically physically separated from the toll plaza, often
following the alignment of the mainline lanes, with toll plaza lanes for
cash toll payments being on a different alignment after diverging
from the mainline lanes or a subset thereof. MUTCD 2009 Edition with
May 2012 Revisions 1
and 2 | |
Open-Road TollingA system designed to allow electronic toll collection
(ETC) from vehicles traveling at
normal highway speeds.
Open-Road Tolling might be
used on toll roads or toll facilities in conjunction with toll plazas.
Open-Road Tolling is also
typically used on managed lanes and on
toll facilities that only accept payment by ETC.
MUTCD 2009 Edition with
May 2012 Revisions 1
and 2 | |
Open-Road Tolling PointThe location along an Open-Road ETC lane at
which roadside or overhead detection and receiving equipment are
placed and vehicles are
electronically assessed a toll. MUTCD 2009 Edition with
May 2012 Revisions 1
and 2 | |
Operating SpeedThe speeds at which vehicles are observed operating during free flow conditions. Free flow speeds are those observed from vehicles whose operations are unimpeded by traffic control devices (e.g., traffic signals) or by other vehicles in the traffic stream. The 85th percentile of the distribution of observed speeds is the most frequently used measure of the operating speed. MUTCD 2009 Edition with May 2012 Revisions 1 and 2 | |
Opposing TrafficVehicles that are
traveling in the opposite direction. At an intersection, vehicles entering from
an approach that is
approximately straight ahead would be considered to be opposing
traffic, but vehicles entering from
approaches on the left or right would not be considered to be
opposing traffic.
MUTCD 2009 Edition with
May 2012 Revisions 1
and 2 | |
ORTopen-road tolling
MUTCD 2009 Edition with
May 2012 Revisions 1
and 2 | |
Overhead SignA sign that is placed
such that a portion or the entirety of the sign or its support is
directly above the roadway or shoulder such that
vehicles travel below
it. Typical installations include signs placed on cantilever arms that
extend over the roadway or shoulder, on sign support
structures that span the entire width of the pavement, on mast arms
or span wires that also support traffic control
signals, and on highway bridges that
cross over the roadway.
MUTCD 2009 Edition with
May 2012 Revisions 1
and 2 | |
Social networks