Key Biscayne Master Plan 043944000.18w_Key_Biscayne_MP(forJooMag) | Page 98

VILLAGE OF KEY BISCAYNE UNDERGROUNDING OF UTILITIES — MASTER PLAN
9.3
Traffic Conditions During the Work
To more precisely determine how construction activity will impact traffic
in the project area, an evaluation of the construction activities for each
type of work was completed. Not all construction activities will generate a
large displacement of the current motorists. Three major traffic controlling
measures implemented during construction will have significant impacts
on the traveling public. These include lane restrictions, shoulder closure,
and short-term closures. Detour route alternatives are shown on the maps
beginning on page 98. However, the timing, sequence, and implementation
of closures and lane restrictions will be detailed in the maintenance of traffic
plans provided by the contractor during the construction process. This
allows the contractor the freedom to construct the project in the way they
determine is the most efficient for their operations.
Lane Restrictions
Multiple Lane Restrictions: Multiple lane restrictions consist of prohibiting
any traffic from entering or exiting a portion of roadway in a defined
direction of travel (i.e. northbound or southbound) for an established
construction zone length and quantitative duration. The multiple lane
restriction uses full lane closures to complete construction tasks while
maintaining operational lanes for conveying traffic flows. Once the
construction is completed within the initial portion of the roadway, the traffic
control is “flipped” or modified, shifting traffic onto the previously impacted
lanes and closing the remaining lanes for construction activities. This type
of lane restriction can be accomplished with signage and barricades or
with construction flagmen, depending on the duration of the restriction.
Weekend Closure: Weekend closures are traffic control measures that
restrict or close travel lanes for an entire weekend. In most applications,
a weekend is considered 9:00 p.m. Friday evening to 5:00 a.m. Monday
morning. Weekend closures are installed using barricades, vertical panels,
flashing arrow panels, truck mounted attenuators, and the appropriate
construction signage to convey the maintenance of traffic. Weekend
closures should be scheduled to avoid peak weekends where access and
mobility throughout the Village is essential to the success and operation of
any special event or holiday.
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Night-time Closure: Night-time closures are traffic control measures that
restrict or close travel lanes for an entire night. Night-time closures are
installed using cones, flashing arrow panels, truck mounted attenuators,
and the appropriate construction signage to convey the maintenance of
traffic. Night-time closures should be scheduled to avoid peak nights when
access and mobility throughout the Village is essential to the success and
operation of any special event or holiday.
Construction activities anticipated to occur throughout the undergrounding
program that may use lane restrictions are:
 Conduit installation (undergrounding)
 Equipment and cable installation (undergrounding)
 Pole and wire removal (undergrounding)
 Watermain installation
 Drainage improvements
 Street lighting improvements
 Pump station improvements
The use of a multiple-lane restriction, weekend closure, or night-time
closure will be determined during design and construction of each phase.
Shoulder Closure
A shoulder closure consists of prohibiting any traffic by public motorists
from driving on the roadside shoulder in a defined direction of travel (i.e.,
northbound or southbound) for an established length construction zone
and quantitative duration. In the case of the north-south thoroughfares,
this closure will be applied in both the northbound and southbound
directions of travel. The closures are anticipated to span the time required
to complete the construction of facilities outside of the travel lanes and may
reduce travel lane widths. However, they will not eliminate the use of any
travel lanes.
Construction activities using shoulder closures are:
 Conduit installation (undergrounding)
 Equipment and cable installation (undergrounding)
 Pole and wire removal (undergrounding)