Is it legal to drive with a cracked windshield?

Cracked windshield laws in the United States

The legality of driving with a cracked windshield varies by location. Drivers are subject to both federal and state laws. 

According to the U.S. Department of Transportation, your vehicle must have a windshield.^[1] The following conditions for that windshield must be met. 

• Free of discoloration or damage in the area extending upward from the height of the steering wheel, excluding a 2-inch border at the top of the windshield and 1-inch border on each side. 
• Exceptions are made for cracks that are less than ¾ inch in diameter, if not intersecting or closer than 3 inches to another crack or damaged area.
• Coloring or tinting the windshield to the right or left of the driver is allowed provided the luminous transmittance is not less than 70% of the light.
• The driver’s field of view cannot be obstructed by devices, decals or stickers.

Cracked windshield laws by state

The above regulations apply when you are driving anywhere in the United States; however, specific states have added additional criteria to their windshield laws and regulations.^[2]

It’s important to know that these laws apply if you are driving through the state, regardless of where your car is registered. Thus if you have a damaged windshield and you’re planning a cross-state road trip,  it’s a good idea to look up the local laws before you leave — or just get your windshield fixed.

Dangers of a cracked windshield

Now let’s look at why these laws exist. A cracked windshield poses several risks:

• Reduced visibility: Cracks can significantly impair a driver’s ability to see clearly, which is essential for safe driving.
• Structural weakness: The windshield contributes to the structural strength of the vehicle. In a collision or rollover, a compromised windshield may not perform effectively, increasing the risk of injury.
• Potential for worsening: Small cracks can quickly become bigger problems if not addressed. Changes in temperature, humidity and physical stress can all cause a small crack to spread across the windshield.

Process for repairing a cracked windshield

Cracks, knicks and other windshield damage are common hazards of the road. Repairing a windshield crack as soon as possible is crucial to maintaining safety and compliance.

For small chips and cracks, a professional repair involving a special resin injected into the crack can often restore integrity and clarity. This process is generally quick and cost-effective.

If the crack is too large or in the driver's direct line of vision, windshield replacement might be necessary. Modern adhesives allow this process to be completed quickly, often within a few hours, and the vehicle can be safe to drive shortly after the installation is complete.

Will insurance cover windshield repair?

Many auto insurance policies cover windshield repair and replacement as part of comprehensive coverage. Some states, including Florida, Kentucky and South Carolina, offer zero-deductible windshield replacement. This means there's no out-of-pocket cost to the vehicle owner for repairing a windshield. 

Some insurers may prefer repair over replacement as it is less expensive. If the damage is extensive, though, replacement will be necessary, and it's crucial to use an insurer-approved service to ensure compliance with your policy terms. Insurance policies vary widely, so it's important to check the specifics of your policy.