Test

Test 2: Midwest Roadside Safety Facility Crash Test TL5CMB-2

Test TL5CMB-2 was conducted by Midwest Roadside Safety Facility MwRSF (MwRSF) to evaluate the crash performance of a new concrete median barrier design according to the testing guidelines of NCHRP Report 350 for Test Level 5 impact conditions. The test involved a 79,705-lb (36,153-kg) tractor-semitrailer vehicle impacting a concrete median barrier at 52.7 mph (84.9 km/hr) and impact angle of 15.4 degrees. The test vehicle was a 1991 White GMC tractor with a 1988 Pines 48-ft (14.6-m) semitrailer. The test article was a 42 inch (1.067 m) tall concrete median barrier with an installation length of 200 ft (60.9 m).

Test vehicle

Barrier

Test article

Geometric dimensions and mass inertial measurements of the test vehicle

Vehicle dimensions

The acceleration data from the test were collected using triaxial piezoresistive accelerometers, and the angular velocities were collected using Analog Systems 3-axis rate transducer. The Electronic Recording Devices (ERDs) were mounted at two locations: 1) the primary ERD set was mounted to the trailer floor on the inside of the trailer near the tandem axles of the trailer and 2) the secondary ERD set was mounted near the tractor tandem axles. Unfortunately, data were not recorded for the secondary ERD set due to a premature triggering of the ERD. Four AOS high-speed video cameras with recording speeds of 500 frames/sec and six digital video cameras with recording speeds of approximately 30 frames per second were used to film the crash test.

Movies

Top view (2MB)	Front view (3.4MB)
Rear view (7.8MB)	Direct front view (5.3MB)

Simulation

Test 3: Texas Transportation Institute Crash Test 7069-13

Test 7069-13 was conducted by the Texas Transportation Institute (TTI), in College Station, Texas. The purpose of the test was to evaluate the strength capacity of a 42-inch (1.07-m) vertical faced concrete parapet bridge railing in accordance with the testing guidelines of the 1989 Guide Specifications for Bridge Railings. The test involved a 1979 International TranStar 4200 tractor with a 1977 Pullman van-trailer ballasted to 50,050 lb (22723 kg) impacting the barrier at 51.4 miles per hour (82.7 km/hr) and 16.2 degrees. The installation length of the barrier was 100 ft (30 m), and the impact point was 24 ft (7.3 m) from the upstream end.

Test vehicle

Barrier

The geometric dimensions and mass inertial measurements of the test vehicle

Test vehicle dimensions

The tractor was equipped with a triaxial accelerometer block mounted near the center of gravity of the tractor and a biaxial accelerometer block mounted over the rear tractor tandems. Two biaxial accelerometer blocks were also placed inside the trailer: one set mounted toward the front near the king-pin and one set toward the rear over the trailer tandem axle. Note: there was no instrumentation to measuring angular displacement of the vehicle. Three high-speed film cameras were used to film the crash test:

Overhead camera with recording speed of 403.7 frames per second (fps)
Camera positioned downstream with a viewpoint longitudinal to the barrier with a recording speed of 386.3 fps, and
Camera positioned with a viewpoint perpendicular to the barrier with a recording speed of 398.9 fps.