6F.01 – Types of Devices Support: FHWA policy that work zone devices meet NCHRP Report 350.
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Transcript of 6F.01 – Types of Devices Support: FHWA policy that work zone devices meet NCHRP Report 350.
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6F.01 – Types of Devices
Support:
FHWA policy that work zone devices meet NCHRP Report 350
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Section 6F.02 General Characteristics of Signs
New table format, “Table 6F-1 Sizes of Temporary Traffic Control Signs” showing the sizes of temporary traffic control warning signs is added
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Section 6F.03Sign Placement
Support: “If alterations are made to
specific traffic control device supports that have been successfully crash tested in accordance with NCHRP Report 350, the altered supports might not be considered to be crashworthy.”
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Section 6F.14 Special Regulatory Signs
Support:signs to enhance speed enforcement
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Section 6F.15 Warning Sign Function, Design and Application
Exit and Detour signs included in new Figure 6F-5
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Section 6F.15 Warning Sign Function, Design and Application
Speed Reduction Signs design changed from Regulatory to Warning.
Sign sizes removed from Figure
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Section 6F.40TURN OFF 2-WAY RADIO
AND CELL PHONE Sign (W22-2)
CELL added to sign message
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Section 6F.42 Shoulder Signs (W8-4, W8-9, W8-9a)
Option:
Shoulder drop-offs < 75mm (3”)
Guidance:
Shoulder drop-offs > 75 mm (3 in)
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Section 6F.45 Double Reverse Curve Signs (W24 Series)
Standard - # of lanes illustrated = # of thru lanes available
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6F.47Special Warning signs
Option: may be used based on engineering judgment
Guidance: conform with color, shape, alphabet and series general requirements
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Section 6F.48 Advisory Speed Plaque (W13-1)
Option – metric plaque
Standard – only used with Warning signs
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Section 6F.52END ROAD WORK Sign (G20-2)
Guidance: place near end of termination area
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Section 6F.53Detour Signs and Markers
(M4-8, M4-8a, M4-8b, M4-9, M4-9a, M4-9b, M4-9c, and M4-10)
Option: Fluorescent pink for Incident management
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Section 6F.55 Portable Changeable Message Signs
Guidance:
450mm/18in min 250mm/10in min
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Section 6F.55 Portable Changeable Message Signs
Guidance
3 Seconds Min
per Phase
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Section 6F.55 Portable Changeable Message Signs
Standard
5 ft Rural, 7 ft Urban to bottom of PCMS
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Section 6F.56Arrow Panels
Guidance:Lane closure for: multilane roadways, high speed, limited sight distance, unexpected
conditions.
Chevron Mode Added
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Section 6F.56Arrow Panels
Guidance:Arrow panel at start of
taper
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Section 6F.56Arrow Panels
Used to:
Close lanes –OK
Shift Traffic-
NO
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Figure 6F.58Channelizing Devices
Figure 6F-7
Lumber barricades have not passed NCHRP 350 crashworthiness testing.
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Section 6F.59Cones
Standard added on cones greater than 36” in height
Minimum of 4 retroreflective
bands
Phase-in target compliance date 5 years
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Section 6F.63Type I, II, or III Barricades
2nd Guidance paragraph replacing Standard Ballast shall not
protrude into Pedestrian Path
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Section 6F.66 Longitudinal Channelizing Barricades
Guidance: should conform to the general characteristics established for the devices described in Chapter 6F re:
- size- color- stripe pattern- retroreflectivity- placement.
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Section 6F.67 Other Channelizing Devices.
New Section added- Optional device- Guidance: conform to other Sections in
Chapter 6F re:- Size- Color- Stripe Pattern- Retroreflectivity- Placement
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Section 6F.68 Detectable Edging for Pedestrians
New Section added:
Guidance:
- Protrude min. 150 mm (6 in) above surface at top
- Bottom of edging max. 62 mm (2.5 in) above surface
- Continuous except gaps for turning or crossing
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Section 6F.69 Temporary Raised Islands
Standard---Temp. Raised Islands at Pedestrian Crossings:
Opening or shortened to provide at least 1500 mm (60 in) wide ped pathway
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Section 6F.70 Opposing Traffic Lane Divider
Standard:
DON’T placed across PEDESTRIAN CROSSINGS
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Section 6F.72 Temporary Pavement Markings
Option:
Half-cycle lengths w/ min. 0.6 m (2 ft) stripes may be used on roadways w/ severe curvature for centerlines in passing zones and for lane lines.
For temporary situations of 3 calendar days or less, for a 2- or 3-lane road, no-passing zones may be identified by:
Guidance: if used, place as per Sections 2B.29, 2B.30, 2C.35
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Section 6F.75Lighting Devices
Guidance:
Max. spacing same as channelization devices
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Sections 6F.75 Lighting Devices
Option---lights on maintenance vehicles for daylight maintenance operations
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Section 6F.76 Floodlights
Support:
General work: 50 lux (5 ft-candles)
Precision work: 216 lux (20 ft-candles)
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Section 6F.76Floodlights
Standard Lighting Flagger Stations @ nightNo Disabling Glare for Workers / Road
Users
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Section 6F.78 Warning Lights
Type D 360-degree Warning Lights
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Section 6F.80 Temporary Traffic Control Signals
Guidance---Use Engineering Judgment re: need for Ped signals or APS along Ped detour
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Section 6F.82 Crash Cushions
Standard:
Damaged crash cushions shall be promptly repaired or replaced.
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Section 6F.84Rumble Strips
4’4’
Guidance---transverse rumble strips on roadway:- Not through ped crossings or on bike routes- Min. 1.2 m (4 ft) clear path at edge of roadway used by bikes