According to the physical principles of lateral centrifugal acceleration ($a_c = \frac{v^2}{R}$), how does doubling cornering speed affect the rollover risk of a high-cube heavy freight truck?

1. The lateral overturning force increases by 4 times ($2^2 = 4$), drastically exceeding the rollover threshold of high-center-of-gravity vehicles
2. The overturning force doubles proportionally by 2 times
3. The overturning force remains unchanged because vehicle mass remains constant
4. The overturning force decreases by half due to aerodynamic downforce