Traffic Barrier Guidelines Other Considerations Hands-On Workshop III July 2013 1.

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Presentation transcript:

Traffic Barrier Guidelines Other Considerations Hands-On Workshop III July

Starts at the Site Visit AOC 1 Identify AOC’s 1.Bridge Pier 2.Bridge Cone 3.Light Pole 4.Control Cabinet 5.Sign Electric Panel 6.Sign Foundation 7.Sign Panel 8.Trees AOC 2 AOC 3 AOC 4 AOC 5 AOC 6 2 How to address the area overall? AOC 7 AOC 8

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. 3

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.

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. 5

Barrier Installation Conflicts Drainage Structure Conflict: Last two posts for Traffic Barrier Terminal Type T6 were omitted. 6

Traversable Element 7

8

Barrier Clearance Distance 9

Barrier Terminal Connection 10

Drainage Structure Conflict 11

Parapet or Concrete Barrier Contributes Toward the LON. 12 AOC #1-Bridge Parapet AOC #2-Waterway AOC #1-LON AOC #2-LON Bridge parapet contributes towards the shielding for AOC #2

Runoff Path Area of Concern NID 13

Runoff Path 14 AOC #1 AOC #2

Runoff Path 15 AOC #1 AOC #2 LRLR Y

Runoff Path 16 AOC #1 AOC #2 LRLR

Speed Profile-Ramp Entrance Service Interchange 30 mph 20 mph

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

Questions? 19

Contact Information: Ext Ext