Traffic Barriers

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"Traffic Barriers" is a PowerPoint for primary and secondary students that describes what traffic barriers are and how they are used. This lesson can also be paired with a "Design Your Own 3D Transportation Model" activity.

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Traffic Barriers

  1. 1. Traffic barriers keep vehicles within their roadway and prevent vehicles from colliding with dangerous obstacles
  2. 2. Traffic barriers installed at the road side also prevent out of control vehicles from traversing steep (non-recoverable) slopes
  3. 3.  Bridge ends  Near steep slopes from roadway limits  At drainage crossings or culverts where steep or vertical drops are present  Near large signs/ illumination poles or other roadside elements which may pose hazards
  4. 4.  used to protect traffic from roadside obstacles or hazards, such as: • slopes steep enough to cause rollover crashes • fixed objects like bridge piers • bodies of water  used as wide medians, to prevent vehicles from colliding with hazards within the median
  5. 5. used to prevent vehicles from crossing over a median and striking an oncoming vehicle in a head-on crash Unlike roadside barriers, they must be designed to be struck from either side
  6. 6.  designed to restrain vehicles from crashing off the side of a bridge and falling onto the roadway, river or railroad below  usually higher than roadside barriers, to prevent trucks, buses, pedestrians and cyclists from vaulting or rolling over the barrier and falling over the side of the structure  Bridge rails are usually multi-rail tubular steel barriers or reinforced concrete parapets and barriers
  7. 7.  used to protect traffic from hazards in work zones  distinguishing feature is they can be relocated as conditions change in the road works  advantages can be that they are assembled without heavy lifting equipment
  8. 8.  The “Steel and Foam Energy Reduction (SAFER) barrier” – sometimes called a “soft wall” – is a technology found primarily on oval automobile race tracks and intended to make racing accidents safer  It was designed by a team of engineers led by Dean Sicking at the Midwest Roadside Safety Facility at the University of Nebraska-Lincoln.
  9. 9.  Initially installed at the Indianapolis Motor Speedway in 2002, in time for the Indianapolis 500  first "tested" by Robby McGehee in a crash during the first day of practice  The theory behind the design is that the barrier absorbs a portion of the kinetic energy released when a race car makes contact with the wall • This energy is dissipated along a longer portion of the wall, instead of propelling the car back into traffic on the track  The SAFER barrier also lessens damage to the car itself, thereby reducing repair costs.
  10. 10.  http://www.youtube.com/watch?v=yQd1Hg0Nt30&feat ure=mfu_in_order&list=UL  http://www.youtube.com/watch?v=PTrbUokgohk  http://www.youtube.com/watch?v=5axpBcwkXD0&fea ture=related  http://www.youtube.com/watch?v=IEqfJoefdkU&featur e=related  http://www.youtube.com/watch?v=KxattLEYmpo&feat ure=mfu_in_order&list=UL

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