It means that for any one car wreck that is the fault of another driver who does not have any insurance your insurance company will pay you up to $250,000 in losses and damages you suffer. If more than one person in your vehicle is injured in the wreck, the company will pay up to $500,000 to all of the persons in your vehicle who were injured and covered under the policy but no more than $250,000 for any one person.
Note that each person who is injured does not automatically get $250,000 – they must demonstrate amount of their damages and can recover up to $250,000 each.
Your policy also provides your protection if the at-fault driver was underinsured. For example, assume that the driver that hit you had a liability insurance policy that provided the driver $100,000 / $300,000 in liability insurance coverage. That means that for any one car wreck that was the other driver’s fault his insurance company will pay a person injured in the wreck up to $100,000 in losses and damages they suffer. If more than one person is injured in the wreck, the company will pay, on the at-fault driver’s behalf, up to $300,000 but no more than $100,000 for any one person.