Illinois Safety Program IDOT District ATSSA Workshop

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1 Illinois Safety Program IDOT District ATSSA Workshop Roadway Departure & MASH DRAFT IDOT Facilitator: Dave Piper ATSSA Facilitator: Jim Thonn 1

2 Illinois Emphasis Area Priority Pyramid 2

3 Fatalities and Serious Injuries by EA ( ) 3

4 MASH and NCHRP 350 4

5 What is MASH? 5

6 IDOT Replacement and Upgrading For consistency, the same guidelines will be applied to all routes under Illinois Department of Transportation jurisdiction. 6

7 Replacement of Hardware (Proactive) Agencies are urged to establish a process to replace existing highway safety hardware that has not been successfully tested to NCHRP Report 350 or later criteria. (Proactive) 7

8 Upgrade Totaled Hardware Reactive 8 Agencies are encouraged to upgrade existing highway safety hardware to comply with the 2016 edition of MASH either when it becomes damaged beyond repair, or when an individual agency's policies require an upgrade to the safety hardware. (Reactive)

9 Lettings After December 31, 2017 W-beam Guardrail CURRENT DIRECTION Midwest Guardrail System (MGS) 9

10 Lettings After December 31, in. Min 42 in. Likely 10 Cast-in-Place Concrete Barrier CURRENT DIRECTION Single/Constant Slope??? NCHRP 20-07(395)

11 Lettings After June 30, W-Beam Terminals CURRENT DIRECTION Proprietary Pooled Fund Development

12 SoftStop End Terminal MSKT Drawing* *Source: IDOT Qualified Products Lists: 12

13 Lettings After December 31, Cable Barrier and Terminals CURRENT DIRECTION Proprietary Pooled Fund Development

14 Lettings After December 31, Crash Cushions CURRENT DIRECTION Proprietary

15 Lettings After December 31, Bridge Rails and Transitions CURRENT DIRECTION Single/Constant Slope NCHRP 20-07(395) MwRSF Transition and Buttress New Side Mount

16 Manufactured After December 31, Work Zone Devices Including Temporary Concrete Barrier Existing hardware may be used throughout its normal service life.

17 2017 Updated and New Standards 17

18 Standard Shoulder Inlet with Curb 18

19 Standard Steel Plate Beam Guardrail 19

20 Standard (NEW) Non-Blocked Steel Plate Beam Guardrail MAY NOT BE USED Behind a curb Within 25 ft. of a Type 5, 6, 6A, or 6B Within 12.5 ft. of a Type 1 Within 50 ft. of a Type 2 With post spacing other than 6 ft. 3 in. With wood posts With a flare 20

21 Standard Strong Post Guardrail Attached to Culvert 21

22 Standard Long-Span Guardrail Over Culvert 22

23 Standard (NEW) Weak Post Guardrail Attached to Culvert 23

24 Standard (NEW) Back Side Protection of Guardrail 24

25 Standard PCC/HMA Stabilization at Steel Plate Beam Guardrail 25

26 Standard Traffic Barrier Terminal, Type 2 26

27 Highway Standards , , Traffic Barrier Terminal, Type 6, 6A, 6B 27

28 Revised Procedures for Design, Plan Layout and Final Documentation of Traffic Barrier Terminal, Type 1 (Special) and Attached Guardrail 28

29 Design Length of Need as Usual 29 Suppose Length of Need = 200 ft. at a bridge.

30 Locate the Beginning of Length of Need of the Terminal to the Design Length of Need Point. 200 ft 25 ft 12.5 ft End of Parapet Assume: 1 The shortest length TBT T1 from the Qualified Products List. 2 The BLON is at 12.5 ft from the end of the terminal. Begin TBT T1 BLON End TBT T1 30

31 Locate any Fixed Connection Points 200 ft 36.9 ft 25 ft 12.5 ft End of Parapet End of Type 6 Begin TBT T1 BLON End TBT T1 31

32 Guardrail Connects the Terminal Ends 200 ft 36.9 ft 200 ft 36.9 ft -25 ft = ft 25 ft 12.5 ft Guardrail Plan Quantity End of Parapet End of Type 6 Begin TBT T1 BLON End TBT T1 32

33 Adjusting the Layout for the Selected Traffic Barrier Terminal(s) 200 ft ft ft 33 End of Parapet Suppose the Contractor chooses a different terminal than assumed in the plans. Its length of need begins at ft from Post 1. It provides ft length of need and this is a splice location. First attempt to place its BLON at the plan length of need point. Splice to Type 1 End of Type 1 (Post 1)

34 Adjusting the Layout for the Selected Traffic Barrier Terminal(s) 200 ft 36.9 ft ft ft End of Parapet End of Type 6 (Splice) The Type 6 terminal does not move. Plot it. Note that the Type 6 also ends at a splice location. Splice to Type 1 End of Type 1 (Post 1) 34

35 Adjusting the Layout for the Selected Traffic Barrier Terminal(s) 200 ft 36.9 ft ft ft ft End of Parapet End of Type 6 (Splice) How much guardrail is needed to meet the plan length of need point? = Splice to Type 1 End of Type 1 (Post 1) 35

36 New BDE Special Provision TRAFFIC BARRIER TERMINAL, TYPE 1 SPECIAL (BDE) Effective: January 1, 2017 Revise Article of the Standard Specifications to read: Traffic Barrier Terminal, Type 1 Special (Tangent) and Traffic Barrier Terminal, Type 1 Special (Flared). These terminals shall meet the testing criteria contained in either NCHRP Report 350 or MASH. In addition to meeting the criteria in one or both of these references, the terminals shall be on the Department s qualified product list. The terminal shall be installed according to the manufacturer s specifications. The beginning length of need point of the terminal shall be placed within 12 ft 6 in (3.8 m) of the length of need point shown on the plans. The terminal shall be delineated with a terminal marker direct applied. No other guardrail delineation shall be attached to the terminal section NOTE: No longer requires the Type 1 to provide 37.5 ft of length of need. Actual proprietary terminal length will be paid for. Qualified Product List will be updated to include this length.

37 Adjusting the Layout for the Selected Traffic Barrier Terminal(s) 200 ft ft 36.9 ft 125 ft ft ft End of Parapet End of Type 6 (Splice) The nominal length of guardrail is This could be rounded down to 125 ft or up to and meet the BDE Special Provision using standard panels. Let s round down, that s closer. Splice to Type 1 End of Type 1 (Post 1) 37

38 Adjusting the Layout for the Selected Traffic Barrier Terminal(s) Type 6 Steel Plate Beam Guardrail Type 1 1 EACH 125 FT 1 EACH 36.9 ft ft ft End of Parapet End of Type 6 (Splice) Splice to Type 1 End of Type 1 (Post 1) 38

39 Questions? 39

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