In this case, there is the controversy between Georgia and Florida state governments due to their different state laws in rear-fender mudguards, in Georgia, its state government enact the law that all the trucks must install contoured rear-fender mudguard in state lines, in contract, Florida state government regulate its trucks and trailers must use straight mudguards.
Concerning to whether Georgia statue violates the commerce clause of the U.S, Georgia state government does not violate the commerce clause because of police power, states possess the power to regulate private activities in order to protect or promote public order, health, safety, morals, and general welfare.
On the other hand, based on the meaning of the dormant commerce clause, when state regulations impinge on interstate commerce, courts must balance the state’s interest in the merits and purposes of the regulation against the burden that the regulation places on interstate commerce, congress court could intervene laws enacted by state governments.
Drivers have to stop by roads to change their mudguards, which is not only time consuming but also expenses expensing. In this case, the regulation is an “undue burden” on interstate commerce.
In terms of the Supremacy Clause, there are three aspects to prevent it from any other challenges.

1. Preemption: federal laws is said to preempt a conflicting state or local laws. 2. federal law is pervasive, comprehensive, or detailed that it leaves state and local law no room to supplement it 3. Federal laws create a federal regulatory agency that is empowered to enforce federal