Safety Barrier Grades and Application
| Design Speed | Applicable Section | Grade | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| SB1 | SB2 | SB3 | SB3-B | SB4 | SB5 | SB5-B | SB6 | SB7 | ||
| Low-Speed Section (Below 60 km/h) |
Basic Section | ● | ○ | |||||||
|
General Section 60km/h 70km/h 80km/h |
Basic Section | ● | ○ | |||||||
| Hazardous Section | ● | ○ | ||||||||
| Special Section (e.g., intersections), sections with frequent traffic of special heavy vehicles |
● | ○ | ||||||||
|
High-Speed Section A 90km/h 100km/h |
Basic Section | ● | ○ | |||||||
| Hazardous Section | ● | ○ | ||||||||
| Special Section (e.g., intersections), sections with frequent traffic of special heavy vehicles |
● | ○ | ||||||||
|
High-Speed Section B 110 km/h or above 120 km/h or above |
Basic Section | ● | ○ | |||||||
| Hazardous Section | ● | ○ | ||||||||
| Special Section (e.g., intersections), sections with frequent traffic of special heavy vehicles |
● | ○ | ||||||||
Note 1, ● indicates the generally installed grade.
Note 2, ○ indicates a grade that can be applied depending on the situation, according to risk factors such as road conditions or the level of facility openness.
Note 3, For the new grades (SB3-B, SB5), lower-grade safety barriers for high-speed sections can be installed for High-Speed Section B until sufficient technological development is achieved.
Test Conditions for Strength Performance Evaluation
| Grade | Collision Speed(km/h) | Vehicle Weight(kg) | Collision Angle(°) | Standard Impact Severity (kJ) |
|---|---|---|---|---|
| SB1 | 55 | 8,000 | 15 | 60 |
| SB2 | 65 | 90 | ||
| SB3 | 80 | 130 | ||
| SB3-B | 85 | 150 | ||
| SB4 | 65 | 15,000 | 160 | |
| SB5 | 80 | 230 | ||
| SB5-B | 85 | 270 | ||
| SB6 | 80 | 25,000 | 420 | |
| SB7 | 80 | 36,000 | 600 |
Comparison of Safety Barrier Grades with Basic Guidelines
| Consolidated Edition(2001) | These Guidelines(2012) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Grade | Impact Energy (kJ) |
Impact Energy Calculation Conditions | Grade | Impact Energy (kJ) |
Impact Energy Calculation Conditions | ||||
| Vehicle Weight (ton) |
Collision Speed (km/h) |
Collision Angle (°) |
Vehicle Weight (ton) |
Collision Speed (km/h) |
Collision Angle (°) |
||||
| SB1 | 60 | 55 | 15 | B1 | 60 | 55 | 15 | ||
| SB2 | 90 | 9 | 65 | SB2 | 90 | 8 | 65 | ||
| SB3 | 130 | 80 | SB3 | 130 | 80 | ||||
| SB3-B | 150 | ||||||||
| SB4 | 160 | 14 | 65 | SB4 | 160 | 14 | 65 | ||
| SB5 | 230 | 80 | SB5 | 230 | |||||
| SB5-B | 270 | ||||||||
| SB6 | 420 | 25 | SB6 | 420 | 25 | 80 | |||
| SB7 | 600 | 36 | SB7 | 600 | 36 | ||||
Test Conditions for Occupant Protection Performance Evaluation
| Grade | Collision Speed(km/h) | Vehicle Weight(kg) | Collision Angle(°) |
|---|---|---|---|
| SB1 | 60 | 900a) 1,300 |
20 |
| SB2·SB4 | 80 | ||
| SB3 | 100 | ||
| SB5·SB6·SB7 | |||
| SB3-B·SB5-B | 120 |
Note Option a): A test with a 900kg passenger car is recommended. Until sufficient research is available, the test is conducted with a 1,300kg passenger car
Facilities that pass the 900kg passenger car test do not require the 1,300kg passenger car test.