S11 Mmedian Barriers

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26 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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Median Barriers

RDG Chapter 6

Warrants for Median
Barriers


Prevent cross
-
over crashes



Median width and traffic volumes are
variables

Figure 6.1

Median Width (Feet)

*Average Daily Traffic
(Thousands)

Figure 6.1

*Based on a 5
-
Year Projection

Other Warrant
Considerations for Median
Barriers


Median Cross Slope


Roadway Curvature


Vehicle Speed and Traffic Mix

Median Cross Slope

Roadway Curvature

Vehicle Speed and Traffic Mix

Median Barrier Systems


3 or 4
-
Strand Cable


W
-
Beam (weak post)


Box
-
Beam


W
-
Beam (strong post)


Thrie Beam


Modified Thrie Beam


Concrete Safety Shape

Rude Awakening

New Vs. Old Design

NJ Concrete Barrier

42 inch safety shape

Constant slope barriers

Ultimate wall

Median Barrier Location


Along Centerline


Adjacent to Higher
Roadway


Paired Roadside
Barriers

End Treatments

for Median Barriers


Flared


Tapered


Anchored In Backslope


Shielded With Crash
Cushion