traffic barrier guidelines other considerations hands-on workshop iii july 2013 1
DESCRIPTION
Combining Areas of Concern Case 1 When the two AOC’s are generally at the same station, but with different offsets. AOC 1AOC 2 AOC further from the roadway will result in the longer length of need. 3TRANSCRIPT
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Traffic Barrier Guidelines Other Considerations
Hands-On Workshop IIIJuly 2013
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Starts at the Site Visit
AOC 1
Identify AOC’s1. Bridge Pier2. Bridge Cone3. Light Pole4. Control Cabinet5. Sign Electric Panel6. Sign Foundation7. Sign Panel8. Trees
AOC 2
AOC 3
AOC 4
AOC 5
AOC 6
2
How to address the area overall?
AOC 7
AOC 8
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Combining Areas of Concern Case 1
When the two AOC’s are generally at the same station, but with different offsets.
AOC 1 AOC 2
AOC further from the roadway will result in the longer length of need.
3
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Combining Areas of Concern Case 2
When a fixed object is located in the midst of a long slope AOC.
V
H
1: 2.5 (V:H)
4
The slope AOC will control the length of need.
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Barrier Installation Conflicts
Retaining Wall Conflict• Last six posts for Traffic Barrier Terminal Type T6 were omitted.
Retaining wall design and location could have eliminated the conflicts.
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Barrier Installation Conflicts
Drainage Structure Conflict:Last two posts for Traffic Barrier Terminal Type T6 were omitted.
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Traversable Element
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Traversable Element
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Barrier Clearance Distance
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Barrier Terminal Connection
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Drainage Structure Conflict
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Parapet or Concrete Barrier Contributes Toward the LON.
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AOC #1-Bridge Parapet
AOC #2-Waterway
AOC #1-LONAOC #2-LON
Bridge parapet contributes towards the shielding for AOC #2
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Runoff Path
Area of Concern
NID
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Runoff Path
14
AOC #1
AOC #2
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Runoff Path
15
AOC #1
AOC #2
LR
x
Y
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Runoff Path
16
AOC #1
AOC #2
LR
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Speed Profile-Ramp Entrance
Service Interchange
30 mph20 mph
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Speed Profile-Mainline Exit
• Directional-50 mph minimum (applies to sharpest curve) Ramp with a design speed of 50 mph or greater on which vehicles do not stop.
Service Interchange
50 mph
60 mph
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Questions?
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