Virginia Department of Transportation – Traffic ... · 4/10/2019 · Virginia Department of...
Transcript of Virginia Department of Transportation – Traffic ... · 4/10/2019 · Virginia Department of...
Virginia Department
of Transportation:
Traffic Engineering
Division - Central Office
Traffic Control Devices Specifications,
Standards & Policy Updates
April 10, 2019
Hilton Norfolk The Main - 100 E. Main Street - Norfolk, VA
Harry A. Campbell, PE, PTOE, ITE Fellow
Traffic Control Devices Engineering Manager
• Specifications – In Progress and Potential
Changes
• Standards Updates
• Policies in Development
• VAA-VDOT Pavement Marking Co-op Meeting
Planned
Agenda
Virginia Department of Transportation
• Section 247 and Section 701 are revised with Supplemental Specifications
SS247-002016-01 and SS701-002016-01. These Supplemental
Specifications will be implemented within months (or less).
• Section 247 (SS247-002016-01) Includes:
(a) ASTM D4956, Type IX and XI Reflective Sheeting shall be used for
Overhead Permanent Signs as specified in SS701-002016-01.
Retroreflectivity and Color requirements shall be maintained for the values
listed in ASTM D4956 after 3 years on the outdoor weathering test rack.
(b) ASTM D4956, Type IV, IX and XI Reflective Sheeting shall be used for
Non-Overhead Permanent Signs as specified in Section 701.
Retroreflectivity and Color requirements shall be maintained for the values
listed in ASTM D4956 after 3 years on the outdoor weathering test rack.
Specification Changes – Supplemental Specifications
Virginia Department of Transportation
(c) ASTM D4956 Type IX or XI Reflective sheeting shall be used
on rigid devices that are not permanent signs or object
markers, including but not limited to the following:• Temporary rigid (non-rollup) signs
• Delineators (Standard ED-2, Standard ED-3, barrier, and guardrail)
• Permanent impact attenuators (except permanent sand barrels)
• Guardrail end terminals
• Type 3 barricades (Orange sheeting does not have to be Fluorescent)
• Group 2 channelizing device vertical panels
• Directional indicator barricades
• STOP/SLOW hand paddles
• Rear panels of truck- and trailer-mounted attenuators
• Barrier panels temporarily installed on traffic barrier service
Specifications (Continued Section 247)
Virginia Department of Transportation
(d) ASTM D4956 Type IV reflective sheeting meeting the ASTM
D4956 Supplementary Requirements (S2) shall be used on the
following traffic control devices:
• Tubular markers
• Flexible post delineators
• Drums (See Note 1 below)
• Temporary sand barrels (See Note 1 below)
• Permanent sand barrels
• Cones
Specifications (Continued Section 247)
Virginia Department of Transportation
(a) Reflective sheeting shall conform to Section 247 and shall be
selected from the Department’s Approved List 46. The color for
the legend and background shall be in accordance with the
MUTCD and as specified in the Plans. 1. Overhead Permanent Signs (signs attached to sign structures which overhang travel
lanes) that are not illuminated with sign lighting shall use ASTM D4956 Type XI reflective
sheeting. Overhead permanent signs that are illuminated with sign lighting shall use
ASTM D4956 Type IX sheeting.
Specifications SS701-002016-01 (Section 701)
Virginia Department of Transportation
2. Non-Overhead Permanent Signs (including ground-mount signs, signs
attached to traffic signal supports, and signs attached to sign structures
that do not overhang travel lanes) shall use ASTM D4956 reflective sheeting
as follows:
Background Color of Sign Sheeting Type
White ASTM D4956 Type XI
Red ASTM D4956 Type XI
Yellow ASTM D4956 Type XI2
Fluorescent Yellow-Green ASTM D4956 Type XI3
Green ASTM D4956 Type XI
Black ASTM D4956 Type XI
Purple ASTM D4956 Type XI
Brown ASTM D4956 Types IV, IX, or XI
Blue ASTM D4956 Types IV, IX, or XI
Specifications SS701-002016-01 (Continued Section 701)
Virginia Department of Transportation
Footnotes:1The following signs may use ASTM D4956 Types IV, IX, or XI, regardless of color: Pushbutton
education signs (R10-series signs mounted adjacent to pedestrian pushbuttons), Signs
erected on bikeways physically separated from adjacent roads, R7- or R8-series parking
restriction signs located on non-limited-access highways, D10-series Reference Location
Signs (mile markers) and Intermediate Reference Location Signs, and Post-mounted street
name signs.
2The yellow portions of all yellow W1-series (horizontal change of alignment) signs, W10-series
(railroad warning) signs, and object markers, including supplemental plaques erected beneath
those signs, shall be fluorescent. All other yellow sheeting on signs may be fluorescent or
non-fluorescent.
3All temporary and permanent warning signs related to school zones, pedestrians, or bicyclists
(including associated supplemental plaques) shall use fluorescent yellow-green sheeting
where required by the VA Supplement to the MUTCD unless otherwise specified on the Plans.
Specifications SS701-002016-01 (Continued Section 701)
Virginia Department of Transportation
Sign width1 Allowable substrate
47 inches and less 0.080 or 0.100 inch aluminum
48 inches and more 0.100 inch aluminum
Overlay panel 0.063 inch aluminum
1For diamond-shaped signs, width is measured along the sign’s edge.
Specifications (Continued Section 701)
Virginia Department of Transportation
(c) Sign panel substrates for permanent flat sheet signs shall be in
accordance with the below table, and shall be smooth, flat, and free of metal
burrs and splinters.
Aluminum substrates for permanent flat sheet signs and overlay panels shall
be aluminum alloy in accordance with Section 229.02(a).
cn512-000130-00
TEMPORARY CONTRAST MARKINGS - Type D, Class III pavement markings
shall be used for all longitudinal temporary pavement markings on bridge
decks and hydraulic cement concrete riding surfaces if all of the following
are met:
The road has a speed limit of 45 MPH or greater.
The hydraulic cement concrete riding surface in question is at least 300 feet in
length.
The temporary markings are planned for at least 15 days of use.
Type D, Class III contrast markings are not required for any markings that are
parallel to and within two feet of existing guardrail or other longitudinal
barrier.
SPCN – Temporary Contrast Markings
Virginia Department of Transportation
• Pilot Tested at sites in Virginia
• Finding of Public Interest – FHWA Approved
• An alternative to most I-Beam Structures (V-A and VI-A)
• Standards issued and then pulled from
VDOT’s Standards – Hinge Plate Issue
• I-Beams allowed until at least
December 2019 in the Clear Zone
• Corrected Standards for 4-Inch
7 gage are being corrected will be
re-issued this year.
Sign Structural Supports: 4-Inch 7 Gage Square Tube Post
with MASH Tested Slip Base
Virginia Department of Transportation
4-Inch Square Tube Sign Post:
Standard Updates - Design Table
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Table 2 (also
applies to rest
of Virginia)
Table 1
• Two tables based on AASHTO design wind speeds,
experience, and risk considerations:
• Design Table for eastern portions of
Hampton Roads District
• Design Table for the rest of Virginia
• Taller Centroid and Larger Signs are
the most impacted by the corrections
• In the Interim the revised design
can be requested by Project
Temporary Pavement Policy Development
• Changes already include that when Temporary Tape is used only Type D-
III may be used.
• Retroreflective markings within a Work Zone can contribute to improved
safety and provide a motorist with positive guidance to navigate through
the work zone. Wet reflectivity is an important element on higher speed
roadways.
• VDOT is developing a first DRAFT of Guidance to Designers of the
Maintenance of Traffic Plans that will primarily focus on:
1. Road Type, Speed and Volume,
2. Duration
3. Pavement Type
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Permanent Pavement Markings Policies
• Continue using B-VI Tape on the Limited Access highways unless the
surface will be redone within 4 years,
• B-VI can be used on other non-limited access roads with higher speeds
and volumes,
• Deploy Thermoplastic placement at higher temperatures with Mixed Bead
Elements and strict bead embedment inspection to achieve required wet
retroreflectivity, performance and durability.
• Deploy High-Build Paint with an AASHTO Type III bead,
• Implement Thermoplastic and High-Build Paint as part of Paving
Practices and Retrace Contracts,
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Points of Contact by Topic Areas
• Markings, Signs, and TCD Specs/Standards:
(804) 371-6022
(804) 786-6374
There is an Engineer I Vacancy in our Office
• Temporary Traffic Control:
• Lighting/Electrical:
• Traffic Control Devices Product Preapproval
Process:
Bret.Galloway @VDOT.Virginia.gov