otc presentation 2019 - amazon web services · 2019-10-30 · mash -(manual for assessing safety...

SRE Seminar:

OTCTraffic Engineering Workshop

‘The Safer Roads Strategy’

Jesse HopkinsVice President

Safe Roads Engineering

Safer Roads Strategy

• Brief MASH Review• Specification Updates• Upcoming MASH Hardware• MTO Roadside Design Manual• Road Safety Hardware Deficiency• Industry Training Needs• Design, Install/Maintenance, Inspection

TOPICS:

‘Objects at Rest, Stay at Rest - Objects in Motion, Stay in Motion’Newton’s First Law of Motion


Stopping a Vehicle is Easy


Minimizing occupant risk is the challenge.


There was a time when knowing everything about Guide Rail was easy…

End Terminals were made of very generic components

Things Have Changed !

MASH - (Manual for Assessing Safety Hardware)

o Developed in 2009 (Updated in 2016)

o Uniform guidelines for crash testing permanent and temporary highway safety products.

o Current Provincial Crash Test Guidelines

Crash Testing Guidelines


What Does MASH Test?

o Longitudinal Barrierso Guide Rail, Cable Guide Rail, Barrier

o Crash Cushionso Re-directive and Non Re-Directive

o End Terminalso Shoulder and Median

o Work Zone Attenuation & Channelizationo Truck Mounted Attenuators (TMA)

o Support Structureso Breakaway Signs, Light Poles,

Work Zone Traffic Devices



Evolution of Standards: Factors Driving Change

HRCS 482: One Page Document, specified vehicle mass, impact speed,

and approach angle

NCHRP Report 153: 16 Page Document, introduced angles (IN SERVICE PERFORMANCE)

NCHRP Report 230: 36 Page Document, added a light car category (VEHICLE UPDATE)

NCHRP Report 350:Introduced pickup truck (VEHICLE UPDATE)

MASH 2009: Critical Update to NCHRP 350

Recently Updated to MASH 2016 (VEHICLE UPDATE & IN SERVICE

PERFORMANCE)

1962

1973 1980

1993

2009


Factors Driving Evolution: Vehicle Update

Weight: 2000kg (4409lbs) Weight: 2270kg (5000lbs)

Weight: 820kg (1807lbs) Weight: 1100kg (2420lbs)


Specification Updates: Why Update Test Vehicles?


Factors Driving Evolution: In-Service Performance1993 NCHRP Report 350 End Terminal Crash Testing Matrix Below:

W4


Factors Driving Evolution: In-Service Performance2009 MASH End Terminal Crash Testing Matrix Below:


Factors Driving Evolution: In-Service PerformanceTesting Shallow Angle Impact with NCHRP 350 Products


Factors Driving Evolution: In-Service PerformanceTesting Shallow Angle Impact with MASH Product

Safety Standards Have Evolved


So Has Technology


Also Building Code



Replace in Kind vs Update to Current Standards

Provincial and Municipal Changes

Steel Beam Guide Rail

MASH Exclusive (Type M20 & Type M30)OPSD 912.185 – 912.189Steel Post OnlyReduced Deflection = Decrease Post SpacingOptions available for 2-1 Slope InstallationsGuidance when connecting to NCHRP 350 Guide Rail and Terminals

Specification Updates



No Longer Specifying:- 31” High Guide Rail with Channel- 27-3/4” High Guide Rail with Wood Post- 27-3/4” High Guide Rail with Steel Posts- Guide Rail Spliced at Post


Currently Specifying:- Type M20: 31” High Guide Rail with Steel Post & 8” Offset Block- Type M30: 31” High Guide Rail with Steel Post & 12” Offset Block- Guide Rail Spliced Mid-Span- Shallow Culvert, Reduced Deflection, & Slope Options


Steel Post Median Guide Rail:- 31” High Guide Rail- MASH Approved- Contain and Redirect


Steel Post Median Guide Rail:- 27” High Guide Rail - NCHRP 350 Approved- Does Not Contain and Redirect

MASH Pickup Truck


Innovation Through Crash Worthy Equivalence

(All Tested to MASH TL3)


End Terminals

MASH ExclusiveOPSD 922.165 – MASH Soft StopOPSD 922.186 – MASH SKTOPSD 922.171 – MASH Max TensionAn Update to NCHRP 350 TerminalsGuidance available when connecting to NCHRP 350 Guide Rail



End Terminal

ET Plus X-LiteSKT 350

No Longer Specifying:- ET Plus (Wood or Steel Post)- SKT (Wood or Steel Post)- X-Lite- CCAT 350- Limit Private Entrance Use(OPSD 912.531)

End Terminal

Eccentric Loader Private Entrance Treatment

No Longer Specifying:- ET Plus (Wood or Steel Post)- SKT (Wood or Steel Post)- X-Lite- CCAT 350- Limit Private Entrance Use (OPSD 912.531)

End Terminal

No Longer Specifying:- ET Plus (Wood or Steel Post)- SKT (Wood or Steel Post)- X-Lite- CCAT 350- Limit Private Entrance Use (OPSD 912.531)

Attempted Update to the Eccentric Loader

System

End Terminal

Currently Specifying:- MASH SoftStop Terminal- MASH Sequential Kinking Terminal (MSKT)- MASH Max Tension Terminal

MASH SKTMASH SoftStop MASH Max Tension

End Terminal

Currently Specifying:- MASH SoftStop- MASH Sequential Kinking Terminal (MSKT)- MASH Max Tension Terminal

MASH Sequential Kinking Terminal (SKT)

End Terminal

Currently Specifying:- MASH SoftStop- MASH Sequential Kinking Terminal (MSKT)- MASH Max Tension Terminal

MASH SoftStop

Provincial and Municipal ChangesTemporary Concrete Barrier TCB To Concrete Transition

Temporary Construction Barrier - Special Provision

Eliminated I-Lock Barrier

Type T and Type J (Type J – Modified)

Type X – Unanchored Reduced Deflection

Steel Barrier


Safer Roads Strategy 2019

Temporary Construction BarrierMTO Special Provision 741S03:

MTO Special Provision 741S03:

MTO Special Provision Requires CDED B741 2019 –Deflection Category Breakdown

Temporary Construction Barrier

No Longer Specifying:- I-Lock Temporary Concrete Barrier- I-Lock Barrier Tapered Ends


No Longer Specifying:- I-Lock Temporary Concrete Barrier- I-Lock Barrier Tapered Ends



Cable Guide Rail

MASH ExclusiveOPSD 913.220 – 913.255Steel Post System with ¾” CableReduced Deflection = Decrease Post SpacingOptions available for 2-1 Slope InstallationsTreated/Anchored with NCHRP 350 End Terminals



Cable Guide Rail

No Longer Specifying:- Cedar Post Cable Guide Rail

Cable Guide Rail:Ontario 3 Cable Guide Rail Crash Test

Cable Guide Rail

Currently Specifying:- Gregory Safence High Tension Cable Guide Rail- Gregory Safence High Tension Cable Guide Rail

End Terminal

Cable Guide Rail

Currently Specifying:- Gregory Safence High Tension Cable Guide Rail- Gregory Safence High Tension Cable Guide Rail

End Terminal


Road Safety Hardware: Deficiency ReviewOverview

• There is a need for objective, quantitative criteria in the form of guidelines for assessing damage and deterioration and also determining when a longitudinal barrier requires repair or can remain in service.

• Example: Snowplows often bend steel beam guide rail and sometimes bend or break posts along with it. How are we currently assessing this damage and do we have guidance, research, or testing behind it?

Damage or deterioration may compromise road safety hardware structural integrity and overall crash worthiness


Road Safety Hardware: Deficiency ReviewAt SRE,

We utilize a tiered severity index to inspect road side safety hardware that is based on crash testing, lab reports, in-service performance evaluation, computer simulation, and our industry experience.

• High Priority: (Non-Functional) System is completely compromised and a secondary impact will likely lead to unacceptable barrier performance.

• Medium Priority: (Compromised) The damage is less likely to result in an unacceptable barrier performance than High Priority.

• Low Priority: (Minor Damage) Should not impair the systems performance.


Road Safety Hardware: Deficiency Review



Leaning Guide Rail



Leaning Guide Rail(18 Degree Incline)



Leaning Guide Rail(9 Degree Incline)



Low Guide Rail



Low Guide Rail(23 Inch Mounting Height)



MASH Guide Rail(31 Inch Mounting Height)

Mounting Height Reflective of MASH Testing



Low Guide Rail(27-3/4” Inch Mounting Height)

Mounting Height Reflective of NCHRP 350 Testing



Butt End Structure ConnectionPost Spacing

Rectangular Washers



Dated Structure Connection Crash Test



Low Cable Height (12” Top of Cable)

Note: Granular Sealing



Cable Outside of Sag ToleranceSlope must be 3:1 or Flatter

Cable Guide Rail:Weak Post Cable – Slope = 1.5:1

Cable Guide Rail:Weak Post Cable – Slope = 1.5:1



Radius Guide Rail (Driveway Wrap)



Guide Rail Driveway Wrap Crash Test



Guide Rail Driveway Wrap Crash Test



Hazard Within Working Width- Non Breakaway



Breakaway Light Pole Within Guide Rail Working Width



Breakaway Light Pole Within Guide Rail Working Width



Cable DetachedLag Screw Failure

High Foundation Tube


Industry Training NeedsOverview

• Currently, in Ontario, there are no guidelines or requirements regarding minimum road side safety hardware training for installation, maintenance, and inspection.

• Throughout the US, Department of Transportation Agencies are all working towards setting a baseline training requirement for all employees installing, repairing, and inspecting roadside hardware.

We are working with sophisticated, engineered, crash tested product…We have raised the bar with MASH, is it not time to also raise the bar

with respect to training and product knowledge?

Designer Training

Installation/Maintenance Training

Inspection Training

SRE Roadside Safety Training:We have created Three separate training sessions that can be delivered to a broad

spectrum of road safety professionals.




Designer Training

• Review crash tested products and their design principles• Understanding design parameters from the updated Roadside Design Manual• Hazard assessment and mitigation• Understanding the Clear Zone Concept




• Individual sessions based on longitudinal barrier and high tension cable • Review installation procedures for end treatments and crash cushions• MASH and NCHRP Report 350 Guidelines• Review safe installation practices for road side safety devices

Installation / Maintenance

Training




• Enhanced product knowledge sessions• Review best practices with regards to repair vs replace vs leave in situ• MASH and NCHRP Report 350 Guidelines• Proper damage/repair assessment techniques• Best practices – Road Safety Hardware Damage/Repair Documentation

Inspection Training


SRE Roadside Safety Credentials:

Manufacturer Delivered Train the Trainer Sessions






Roadside Crashes are Chaotic Events

Dodge Charger Crash at OPC- 140 km/hr- Head On- 24m Concrete Barrier


Our Goal is to Decrease Their Frequency and Severity Through the Safer Roads Strategy

Safer Roads

Strategy

Vision / Knowledge

Training

Design

Installation/Maintenance

Inspection

ImprovedDocumentation

In Summary

SRE is able to assist any agency in their goal towards a Safer Roads

Strategy through the elements we have discussed in this module

Please do not hesitate to contact our group for more information

regarding training, crash worthiness, stamped drawings,

asset assessments, and inspections


Jesse HopkinsVice President

Safe Roads Engineering

OTC Traffic Engineering Workshop

The Safer Roads Strategy – End Module

otc presentation 2019 - amazon web services · 2019-10-30 · mash -(manual for assessing safety...

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