Uninsured or underinsured motorist (UM/UIM) coverage is a type of auto insurance that provides protection to policyholders in the event they are involved in an accident with a driver who either does not have insurance (uninsured) or does not have sufficient insurance to cover the full extent of the damages (underinsured). Here's how UM/UIM coverage applies in motor accident cases: Uninsured Motorist Coverage: If you're involved in an accident caused by a driver who does not have auto insurance (uninsured), your uninsured motorist coverage can help cover your medical expenses, lost wages, and other damages. Without this coverage, you might have to rely on your health insurance or pay out-of-pocket for these expenses. Underinsured Motorist Coverage: If the at-fault driver has insurance but their coverage limits are insufficient to fully compensate you for your damages (underinsured), your underinsured motorist coverage can make up the difference, up to the limits of your own policy. This coverage is particularly useful in cases where the at-fault driver's insurance is insufficient to cover your medical bills or other expenses. Scope of Coverage: UM/UIM coverage typically applies to you as the policyholder, as well as your passengers, family members, and anyone else covered under your policy, depending on the terms of your insurance contract. It may also extend to situations where you're injured as a pedestrian or cyclist by an uninsured or underinsured motorist. Filing a Claim: To access UM/UIM coverage, you'll need to file a claim with your own insurance company. Your insurer will investigate the accident and determine whether the other driver was uninsured or underinsured. If so, they will evaluate your damages and provide compensation up to the limits of your policy. Limits and Deductibles: UM/UIM coverage comes with policy limits, which represent the maximum amount your insurer will pay for a covered claim. You can choose the limits when you purchase your auto insurance policy. Additionally, UM/UIM coverage may have a deductible, which is the amount you must pay out-of-pocket before your insurance coverage kicks in. Stacking Coverage: In some jurisdictions, policyholders may have the option to "stack" UM/UIM coverage if they have multiple vehicles insured under the same policy or multiple policies with the same insurer. Stacking allows you to combine the coverage limits of each policy or vehicle, potentially increasing the amount of compensation available to you in the event of a covered claim. Overall, uninsured or underinsured motorist coverage is designed to protect you financially in the event of an accident with a driver who lacks adequate insurance coverage. It's an important component of auto insurance that can provide valuable financial protection and peace of mind on the road.