TL-3 Barrier Rating – Technical Specification Guide

Test Level Overview

Parameter	Specification	Tolerance	Purpose
Test Speed	100 km/h	+2/-0 km/h	High containment
Impact Angle	25 degrees	±1.5°	Standard impact
Vehicle Mass	2,270 kg	±45 kg	Design vehicle
Impact Energy	165.8 kJ	±5 kJ	Energy absorption
Deflection Limit	2.1m	+0.3m	Working width

Vehicle Test Requirements

Vehicle Type	Mass (kg)	Speed (km/h)	Angle (°)	Exit Box Criteria
Pickup Truck	2,270	100	25	Required
Passenger Car	1,100	100	25	Required
Small Car	820	100	20	Required
Test Article	N/A	N/A	N/A	No penetration
Occupant Risk	THIV ≤33 ft/s	PHD ≤20g	ASI ≤1.4	Required

Performance Criteria

Criterion	Requirement	Measurement	Acceptance
Structural Adequacy	A	No penetration	Pass/Fail
Occupant Risk	D,F,H,I	Within limits	Pass/Fail
Vehicle Trajectory	L,M	Controlled exit	Pass/Fail
Post Impact	K	No detachment	Pass/Fail
Working Width	W6 max	≤2.1m	Measure

Compliant Barrier Systems

Barrier Type	Height (mm)	Width (mm)	Post Spacing (m)	Application
Strong Post W-Beam	706	180	1.905	Highways
Thrie Beam	813	245	1.905	Transitions
Modified Thrie Beam	813	245	0.952	High risk
Concrete Safety Shape	810	600	Continuous	Rigid barrier
High-Tension Cable	750	200-300	3.0-3.2	Medians

Installation Requirements

Parameter	Specification	Tolerance	Verification
Post Embedment	1.1m minimum	+50/-0 mm	Measure
Rail Height	As designed	±20mm	Level check
Soil Strength	20 kPa minimum	N/A	Test
Block Height	360mm	±10mm	Measure
Foundation Grade	1:10 max	±1%	Survey

Maintenance Schedule

Component	Frequency	Check Points	Action Required
Rail Elements	Monthly	Damage/alignment	Repair/replace
Posts	Quarterly	Stability/alignment	Reset/replace
Hardware	Monthly	Tightness/corrosion	Tighten/replace
Foundations	Semi-annual	Erosion/stability	Repair/reinforce
End Treatments	Monthly	Damage/alignment	Repair/replace

Repair Criteria

Damage Type	Assessment	Action	Timeline
Rail Damage	>75mm deflection	Replace	24 hours
Post Damage	Any movement	Replace	48 hours
Hardware Loss	Any missing	Replace	24 hours
Alignment	>50mm offset	Realign	1 week
End Treatment	Any damage	Replace	24 hours

Documentation Requirements

Document	Content	Update	Distribution
As-Built	Installation details	Per install	Project file
Inspection	Condition report	Monthly	Maintenance
Repair Log	Work completed	Per repair	Asset manager
Impact Report	Incident details	Per event	Safety team
Test Results	Compliance data	Per batch	Quality control