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Roadside Barriers RDG Chapter 5
Barrier Types Roadside Barriers Median Barriers Bridge Railings
Barrier Testing: NCHRP 350 (Test Level 3) STRENGTH TEST 4400 lb. 62 mph 25 degrees SEVERITY TEST 1800 lb. 62 mph 20 degrees
NCHRP 350 Test Levels 1-3 Test LevelImpact speed Vehicle Type TL-150 kph/30 mph 820kg Car; 2000kg Pickup (1800 lb.) (4400 lb.) TL-270 kph/45 mph 820kg Car; 2000kg Pickup (1800 lb.) (4400 lb.) TL kph/62 mph820kg Car; 2000kg Pickup (1800 lb.) (4400 lb.)
NCHRP 350 Test Levels 4-6 Test LevelImpact Speed Vehicle Type TL kph/62 mph 80 kph/50 mph 820kg Car; 2000kg Pickup 8,000kg Single Unit Truck (18,000 lb.) TL kph/62 mph 80 kph/50 mph 820kg Car; 2000kg Pickup 36,000kg Tractor Trailer (80,000 lb.) TL kph/62 mph 80 kph/50 mph 820kg Car; 2000kg Pickup 36,000kg Tanker Truck (80,000 lb.)
NCHRP 350 Test Levels 4-6 TL-5 Vehicle TL-6 Vehicle TL-4 Vehicle
Evaluation Criteria Structural adequacy of the tested feature Occupant risk Vehicle trajectory after impact
Barrier Structural Adequacy Any test vehicle must be contained and redirected Controlled deflection of the barrier is acceptable
Occupant Risk No penetration of the passenger compartment Passenger compartment should not be significantly deformed The 1800 lb and 4400-lb test vehicles must remain upright after collision
More Occupant Risks... Unrestrained Passenger Decelerations: –Under 9 m/sec (30 ft./sec) preferred –12 m/sec (40 ft./sec) max Occupant deceleration over a 10 millisecond period: –Should not exceed 15 Gs –20 Gs is allowable
NCHRP 350 UPDATED. NCHRP 350 Historical Review Document Source Year Issued Number of Pages Test Vehicle & Weight HRB # lb. car NCHRP #115.
Florida Department of Transportation T EMPORARY B ARRIER S YSTEMS FDOT Contacts: District Construction Marshall Douberley marshall.douberley.
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1 1 = = = 18 9 = 30 5 = = 36 9 =
Multi-axis Load Cell Chang Joon Lee CEE398 KUC Experimental Methods in Structural Engineering.
Who Wants To Be A Millionaire? Fractions, Question 1.
1 1 = = = = = 6.
SUMMARY CHANGES FOR NCHRP REPORT 350 GUIDELINES [NCHRP (02)] Keith A. Cota, Chairman Technical Committee on Roadside Safety May 4, 2007.
Florida Department of Transportation T EMPORARY C RASH C USHIONS FDOT Contacts: District One Construction Marshall Douberley marshall.douberley.
Work and Energy Dr. Robert MacKay Clark College. Introduction What is Energy? What are some of the different forms of energy? Energy = $$$
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Status of the Roadside Design Guide Update AASHTO Subcommittee on Design July Indianapolis, Indiana Keith A. Cota, New Hampshire Department.
Fixed and Variable Costs. Median income per household member in the U.S. in 2006 was in the range from: 1)$15,000-20,000 2)$20,000-25,000 3)$25,000-30,000.
SSPC PA-2 Measurement of Dry Coating Thickness with magnetic Gages HOW MUCH IS ENOUGH? Statistical method to determine the minimum number of readings required.
Warm up Complete the analogies: 5 is to 25 as 6 is to ___________ 7 is to 77 as 11 is to ___________ ¼ is to ½ as.25 is to ____________
Physics 2 Distance, speed and acceleration GCSE Additional Science Chapter 15.
Fall 2014 Most of the Material taken from: Roadside Design Guide (2011) published by AAHSTO.
MOTION Three featured concepts are: Speed Velocity Acceleration.
UNIT 2: SOLVING EQUATIONS AND INEQUALITIES SOLVE EACH OF THE FOLLOWING EQUATIONS FOR y. # x + 5 y = x 5 y = 2 x y = 2 x y.
N u c o r h i g h w a y.com Nucor Steel Marion, Inc. TL 3 System 4400 lb Pickup Truck 1800 lb Small Car Impacting at 62 mph 25 degrees.
Office of Highway Safety Highway Factors David S. Rayburn.
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SECME Requirements Building Bridges: SECME Requirements.
UPDATE OF THE U.S. CRASH TEST PROCEDURES UPDATE OF THE U.S. CRASH TEST PROCEDURES Revision of NCHRP Report 350: Recommended Procedures for the Safety Performance.
Barrier Warrants. Potential Hazards –Bridge Abutments/Piers/Approach Railing –Large Drainage Structures –Non-Breakaway Sign and Luminaire Supports –Embankments.
Fractions Simplify: 36/48 = 36/48 = ¾ 125/225 = 125/225 = 25/45 = 5/9 8/12 = 8/12 = 2/3 Simplify: 75/250 = 75/250 = 3/10 125/250 = 125/250 = ½ 3/225 =
Variable Systems Linear Prog. Mixed Applicati ons Leftovers
Performance as Test Procedures of the PDB and ODB Tests for the Light and Heavy Cars 5th Meeting of the Informal Group on Frontal Impact 1 May 25, 2009.
The purpose of driver licensing: The purpose of driver licensing is to assure that no one using the Highway Transportation System, is an unreasonable risk.
Effectiveness of SEAS in Car-to-Car Frontal Crashes JAPAN 19th Meeting of the Informal Group on Frontal Impact 1.
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