If you were driving that truck, you'd be dead. Very, very dead.
Texas A&M's Transportation Institute has a contract with the US State Department to develop barriers that could stop a truck laden with explosives traveling at 50 MPH, according to the Texas Tribune. And really, that it is all it is expected to do, as the Tribune notes rather ominously:
The ability of a driver to survive such a crash is not a primary concern.
Just judging from the video alone, the test looked like a rousing success, especially when you're worried about protecting embassies from a possible terrorist threat. It's not a far-fetched threat, either, as truck bombs seriously damaged two US embassies, and killed over 200 people in a coordinated 1998 attack.
But damn is that barrier strong.