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Published byKacie Webster
Modified over 2 years ago
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
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
New Vs. Old Design
NJ Concrete Barrier
42 inch safety shape
Constant slope barriers
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
Fall 2014 Most of the Material taken from: Roadside Design Guide (2011) published by AAHSTO.
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Guard cable stretches across 500 miles of Missouri interstates. Cable was installed at locations where medians are less than 60 feet wide.
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