Guardrail Safety
Crash Test Reports
NCHRP-350 Test 3-30
Description of test 3-30 according to NCHRP Report 350:
This test is conducted with the vehicle approaching parallel to the roadway, with impact to the right of the vehicle’s centerline. It is intended primarily to evaluate occupant risk and vehicle trajectory criteria. The vehicle should be offset to the most critical side, that is, the side which will result in the greatest occupant risk during and subsequent to impact, recognizing the direction the vehicle will tend to roll, pitch, and yaw after the impact. The impact is to the right of the vehicle’s centerline; the vehicle will tend to rotate clockwise (as viewed from above).
- Karco Report on Test 3-30
- Videos
NCHRP-350 Test 3-31
Description of test 3-31 according to NCHRP Report 350:
This test is conducted with the vehicle (pickup truck) approaching parallel to the roadway with impact at the vehicle’s centerline. For a device designed to decelerate a vehicle to a stop, these tests are intended to evaluate the capacity of the device to absorb the kinetic energy of the 2000 kg vehicle in a safe manner.
- Karco Report on Test 3-31
- Videos
NCHRP-350 Tests 3-32 and 3-33
Description of tests 3-32 and 3-33 according to NCHRP Report 350:
Tests 3-32 and 3-33 examine the terminal device when it is impacted at an angle (15°) by a vehicle (small car or pickup truck, respectively) and are intended primarily to evaluate occupant risk and vehicle trajectory criteria.
- Karco Report on Test 3-32
- Videos
- Karco Report on Test 3-33
- Videos
NCHRP-350 Tests 3-32 and 3-33 (modified to five degrees)
Description of tests 3-32 and 3-33 (modified to 5°) according to NCHRP Report 350:
Tests 3-32 and 3-33 (modified to 5°) examine the terminal device when it is impacted at an angle by a vehicle (small car or pickup truck, respectively) and are intended primarily to evaluate occupant risk and vehicle trajectory criteria.
Information that has come to light in recent years, since the development of NCHRP 350, suggests that a low impact angle of 5° may reflect a critical impact condition that warrants evaluation. While the standard test matrix for the NCHRP 350 test protocol does not explicitly include a test at the 5° angle, that protocol does state, “It is not possible to anticipate the form that new designs will take nor the critical impact conditions of these new designs. As such, the test matrices presented in this section must not be viewed as all-inclusive. When appropriate, the responsible agency should devise other critical test conditions consistent with the range of expected impact conditions.”
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