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Florida Department of Transportation T EMPORARY B ARRIERS AND C RASH C USHIONS 1.

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Presentation on theme: "Florida Department of Transportation T EMPORARY B ARRIERS AND C RASH C USHIONS 1."— Presentation transcript:

1 Florida Department of Transportation T EMPORARY B ARRIERS AND C RASH C USHIONS 1

2 2 T EMPORARY B ARRIERS Precast Concrete Temporary Barrier Temporary Guardrail Temporary Water Filled Barriers Temporary Low Profile Barrier

3 3 P RECAST C ONCRETE JJ Hook 415Type K Temporary Barriers

4 4 I NDEX 415 B ARRIER W ALL Temporary Barriers

5 5 I NDEX 415 B ARRIER W ALL Temporary Barriers Index 415 units constructed prior to October 1, 2002 may be used until September 30, 2012 THROUGH JUNE 30, 2012 LETTING with usage of ‘FDOT Snake Pin’ Interconnection

6 6 I NDEX 415 - JJ H OOK Temporary Barriers

7 7 I NDEX 415 AND JJ H OOK Free Standing Rigid Pavement (Concrete) Flexible Pavement (Asphalt) Cross Slope of 1 to 10 or flatter Required Between Other Types of Barriers Varies on Use, Location and Speed

8 8 I NDEX 415 AND JJ H OOK Free Standing

9 9 I NDEX 415 AND JJ H OOK Rigid Pavement (Concrete) Flexible Pavement (Asphalt) Cross Slope of 1 to 10 or flatter

10 Required Between Other Types of Barriers 10 I NDEX 415 AND JJ H OOK

11 11 I NDEX 415 AND JJ H OOK Varies on Use, Location and Speed

12 12 I NDEX 415 AND JJ H OOK Traffic Side

13 13 I NDEX 415 AND JJ H OOK When ShieldingDesign Speed Space Above Ground Hazards 45 mph or Less 2’ 50 mph and Greater 4’ Deflection Drop off Hazards 45 mph or Less 2’ 50 mph and Greater: 2’ b. All drop off conditions other than ‘a.’ a. Drop off 4’ or less, no traffic below 4’ Deflection Space Based On Installation On An Asphalt Or Concrete Surface. Traffic Side

14 14 I NDEX 415 AND JJ H OOK Used As Design SpeedOffset to Travel way Median Barrier Separating Opposing Traffic Lanes 45 mph or Less 50 mph and Greater 2’ 0 min., 2’ preferred Traffic Side

15 15 I NDEX 414 – T YPE K Temporary Barriers Only Type K barrier is approved for use on bridges 12’-6” Segment Length

16 16 T YPE K Bolted Staked Free Standing Backfilled Installation Rigid Pavement (Concrete) Flexible Pavement (Asphalt) Cross Slope of 1 to 10 or flatter Surface Required Between Type K Freestanding, Bolted, Staked and Back Filled Required Between Other Types of Barriers Transitions Varies on Type of Installation (above), Use, Location and Speed Deflection Space

17 17 T YPE K Bolted Staked Free Standing Backfilled Installation

18 18 T YPE K Rigid Pavement (Concrete) Flexible Pavement (Asphalt) Cross Slope of 1 to 10 or flatter Surface

19 T YPE K Required Between Type K Freestanding, Bolted, Staked and Back Filled Required Between Other Types of Barriers Transitions 19

20 20 T YPE K See Index 414 - Sheet 5 Bolted See Index 414 - Sheet 6 Staked See Index 414 -Sheet 6 & 7 Free Standing See Index 414 - Sheet 7 Back Filled

21 T YPE K See Index 414 - Sheet 5 Bolted 21

22 T YPE K See Index 414 - Sheet 6 Staked 22

23 T YPE K See Index 414 -Sheet 6 Free Standing Roadway 23

24 T YPE K See Index 414 -Sheet 6 Free Standing Bridge 24

25 T YPE K See Index 414 -Sheet 7 Free Standing Roadway Median 25

26 B ARRIER T ERMS Work Area Approach End – The portion of a barrier system exposed to approaching traffic. 26

27 B ARRIER T ERMS Work Area Trailing End – Downstream end of a barrier system, not exposed to approaching Traffic. 27

28 B ARRIER T ERMS Work Area Unidirectional – Exposed to traffic approaching from one direction only. 28

29 B ARRIER T ERMS Work Area Bidirectional – Exposed to traffic approaching from opposing directions 29

30 B ARRIER T ERMS Work Area Point of Departure - A point on the edge of a lane at which an errant vehicle leaving the lane will likely impact the leading face of a hazard or area of concern. 30

31 B ARRIER T ERMS Work Area Departure Line - A line extending from the Point of Departure to the back of a hazard or Clear Zone 31

32 B ARRIER T ERMS Work Area Departure Rate - The rate at which the Departure Line leaves the roadway and extends to the back of a hazard or CZ. 1:16 or 1:13 32

33 B ARRIER T ERMS Work Area Work Area INSIDE Clear Zone Limit use the Back of Hazard or Back of Work Area Inside Clear Zone 33

34 B ARRIER T ERMS Work Area extends OUTSIDE Clear Zone Limit use the Clear Zone Limit Distance Work Area 34

35 B ARRIER T ERMS Work Area Beginning Length of Need- The point at which a barrier intersects the Departure Line establishes the Beginning of the Length of Need 35

36 B ARRIER T ERMS Work Area Length of Advancement (X) – The distance a longitudinal barrier must be extended in advance of an area of concern in order to adequately shield the hazard. 36 X

37 D=18 ′ d=2 ′ X=256′ Example for 45 mph with CZ of 18’ with Barrier set at 2’ from Edge of Pavement X = 16 (18-2) X = 256’ B ARRIER T ERMS (L ENGTH OF A DVANCEMENT ) 37

38 B ARRIER T ERMS Work Area Length Of Need Unidirectional – Barrier needed is from the approach departure line to the trailing departure line. Length of Barrier Wall Needed 38

39 B ARRIER T ERMS Work Area Length Of Need Bidirectional – Barrier needed is from the approach departure line to the trailing departure line Length of Barrier Wall Needed 39

40 B ARRIER W ALL I NSPECTION Quality Standards for Work Zone Traffic Control Devices Illinois Department of Transportation ATSSA American Traffic Safety Services Association 40

41 B ARRIER W ALL I NSPECTION American Traffic Safety Services Association (ATSSA) 41

42 B ARRIER W ALL I NSPECTION New Spalls & Chipped concrete less than 1.5 inches in depth Loops are in good condition Acceptable 42

43 B ARRIER W ALL I NSPECTION Minor spalls Hairline Cracks Loops are in good condition Marginal 43

44 B ARRIER W ALL I NSPECTION Large spalls Hairline Cracks Loops are not in good condition Unacceptable 44

45 45 L OW P ROFILE B ARRIER

46 46 L OW P ROFILE B ARRIER Design Speeds of 45 mph or less Application Cross Slope of 1 to 10 or flatter Surface Along the run of barrier: Tubular Markers 50’ cc Tangent; 25’ cc radii Approach end: Type 1 Object Marker Supplemental Devices Deflection Space - 9 inch min Approach End Offset – 6 foot min Deflection Space & Offset

47 47 L OW P ROFILE B ARRIER Design Speeds of 45 mph or less Application

48 48 L OW P ROFILE B ARRIER Cross Slope of 1 to 10 or flatter Surface

49 49 L OW P ROFILE B ARRIER Along the run of barrier: Tubular Markers 50’ cc Tangent; 25’ cc radii Approach end: Type 1 Object Marker Supplemental Devices

50 50 L OW P ROFILE B ARRIER Deflection Space - 9 inch min Approach End Offset – 6 foot min Deflection Space & Offset

51 51 L OW P ROFILE B ARRIER Video

52 3 Systems:  Triton  Guardian  Yodock 52 W ATER F ILLED B ARRIERS See QPL

53 53 T RUCK /T RAILER M OUNTED A TTENUATORS (TMA’S) Truck or Trailer Mounted Listed on QPL Indexes 607 & 619 Mounted by Manufacturers Recommendations

54 Inertial Redirective 54 C RASH C USHIONS

55 55 I NERTIAL C RASH C USHIONS Approved for Use 30 days or less Called for in the Plans Shield Barrier Wall end Allowed when ALL the following conditions are met:

56 56 R EDIRECTIVE C RASH C USHIONS Barrier Wall End Anchor Plates

57 57 R EDIRECTIVE C RASH C USHIONS Barrier Wall End Anchor Plates Where barrier wall end units are not anchored, 2 and ½ wall units (min.) are required beyond the length of barrier need for wall end anchorage

58 L ENGTH OF N EED P OINT – TAU-II 58

59 L ENGTH OF N EED P OINT – Q UAD G UARD 59

60 L ENGTH OF N EED P OINT – TRACC 60

61 L ENGTH OF N EED P OINT – SCI 61

62 P AY I TEMS 62 For January 2012 lettings: Crash cushions for capacity projects (add lanes and reconstruction, add lanes and rehab pavement, interchanges and new road construction) will no longer be paid invoice plus 20%.

63 Q UESTIONS ???????????????? 63


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