Why Center of Gravity Matters for CDL
The center of gravity (CG) determines how stable a truck is during turns, lane changes, and braking. A high CG increases rollover risk significantly.
| Load Position | CG Height | Rollover Risk |
|---|---|---|
| Heavy cargo on floor | Low | Low |
| Even distribution | Medium | Moderate |
| Heavy cargo on top | High | High — dangerous |
What the CDL Exam Asks
Test questions focus on: (1) Keep the CG as low as possible. (2) Distribute cargo evenly. (3) Secure loads to prevent shifting. A shifted load moves the CG, making the truck unstable.
Source: FMCSA Cargo Securement Rules