You don't need a shady "unblocked" website. You need a strategy. If you own a legitimate copy of BeamNG.drive (buy it on Steam—it is worth $25), here is how to play it on a school or work computer.
If you have access to the game but are experiencing lag or low FPS (Frames Per Second), the game needs optimization. BeamNG.drive is heavily CPU-dependent. unblocked beamng drive
Gameplay Settings:
Most school computers block installations on the C: drive but allow USB drives. You don't need a shady "unblocked" website