Can I Legally Drive with a Cracked Windshield in Tennessee?


Key Takeaways

  • It is generally illegal to drive with a cracked windshield, as it obstructs the driver’s view and can be unsafe based on federal law.
  • Even without state law, driving with a cracked windshield is something we don’t recommend.
  • Driving with a cracked windshield is not recommended for several reasons, including obstructed vision while driving, weakened roof integrity, and the risk of shattered glass upon impact.

Federal Law on Cracked Windshields

Tennessee doesn’t have state laws about cracked windshields, but federal law does apply. 

According to the U.S. Department of Transportation rules, your windshield must meet these minimum standards:

  • Cracks must be smaller than ¾ inch in diameter.
  • Two cracks cannot be within three inches of each other.
  • No intersecting cracks are allowed.
  • Cracks cannot be directly in the driver’s line of sight.
  • From the top edge of the windshield down to two inches above the steering wheel, cracks cannot intersect.

If your windshield doesn’t meet these requirements, you may be violating federal law.

Why You Shouldn’t Drive with a Cracked Windshield

Even if Tennessee doesn’t have specific state laws, driving with a cracked windshield is dangerous for many reasons.

Impaired Visibility

  • Cracks and chips scatter light from headlights and streetlights, making it hard to see.
  • Even small cracks can create glare, blocking your view of other vehicles or obstacles.

Weakened Car Structure

  • A cracked windshield weakens the roof, which could collapse in a rollover accident.
  • The glass can shatter unexpectedly from a collision, sudden braking, or rough roads.

Increased Risk of Injury

  • A shattered windshield can increase the chance of being ejected from the car in a crash.
  • Broken glass can cause serious injuries to passengers.
  • An intact windshield helps keep passengers inside during an accident.

Higher Risk of Accidents

  • Cracks in the windshield can block your vision, increasing accident risks.
  • Damaged glass can create reflections or glare that momentarily blind the driver.

What NOT to Do If You Have a Cracked Windshield

In the case you have a damaged windshield, we don’t recommend doing the following:

Exposing It to Extreme Temperatures

  • Hot and cold weather can cause the crack to spread.
  • Blasting hot air from the heater directly onto the crack can make it worse.

Driving on Rough Roads

  • Hitting potholes, speed bumps, or bumpy terrain can expand the crack.

Slamming Car Doors

  • Sudden force can cause the crack to grow or shatter the glass.

Attempting DIY Repairs

  • Home repair kits often don’t fix the problem properly and can make it worse.

What You SHOULD Do Instead

  • Get it professionally inspected – A repair shop can determine if the glass needs fixing or full replacement.
  • Drive carefully – If the crack is small and doesn’t block your vision, drive cautiously until you can get it repaired.
  • Check local laws – Some cities may have stricter rules about cracked windshields.

For your safety, fixing a cracked windshield should be a priority before it turns into a bigger problem.

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FAQs

Who Pays If a Rock Hits My Windshield?

If you have comprehensive car insurance, your policy may cover windshield damage from a rock. However, who is responsible depends on how the rock hit your windshield:

  • If the rock came from the road, you’re responsible for the damage.
  • If debris fell directly from another vehicle, the other driver may be responsible—especially if they didn’t secure their cargo properly.

How Much Does It Cost to Fix a Cracked Windshield?

The cost varies based on your location, service provider, and damage type:

  • Small chip repairs: $60–$100 (discounts may apply for multiple chips).
  • Long crack repairs: $125 or more.
  • Windshield replacement: Prices depend on your vehicle type.

Some insurance plans offer a free windshield replacement for first-time claims. Check with your provider!

Is It Cheaper to Replace a Windshield Without Insurance?

According to Kelley Blue Book, the cost differs on windshield replacements for old cars vs newer vehicles. 

  • Older cars: Replacements typically cost $300–$600 for an aftermarket windshield.
  • Luxury or newer cars: Replacements cost more because of ADAS technology (Advanced Driver Assistance Systems) that require recalibration, pushing costs over $1,000.

To help on the cost, we recommend getting a quote from a mechanic based on your car’s year, make, and model.

How Long Can I Drive with a Cracked Windshield?

You can drive with a small crack for a short time, but fix it as soon as possible. Driving with a cracked windshield is risky because:

  • It blocks your vision, making driving dangerous.
  • It weakens the car’s structure, especially in rollovers.
  • It can shatter unexpectedly, causing injuries.

How Fast Does a Windshield Crack Spread?

A crack can grow within days, especially if:

  • The temperature changes suddenly.
  • You drive on rough roads.
  • The crack is already large.

Can Police Pull Me Over for a Cracked Windshield?

Yes. If your windshield violates local laws, police can stop you, issue a citation, and fine you.

How Much Is a Ticket for a Cracked Windshield?

According to Progressive, tickets vary by state but are usually non-moving violations. Multiple offenses may even lead to a license suspension. Some states allow you to dismiss the fine if you repair the windshield and provide proof.

Is Driving with a Cracked Windshield Dangerous?

Yes! A damaged windshield:

  • Blocks your vision, increasing the risk of accidents.
  • Weakens the roof, making rollovers more dangerous.
  • Can shatter unexpectedly, causing injuries.

For the safety of yourself and other drivers, we recommend you simply fix the small chips quickly to prevent bigger problems. 

Can a Cracked Windshield Shatter Completely?

Yes! Over time, the crack spreads and weakens the glass. A hard bump, extreme temperature change, or another impact can cause the windshield to break completely. Many states have laws against driving with significant windshield cracks.

Can Bad Weather Crack My Windshield?

Yes! Severe weather, like hailstorms, can cause immediate cracks or weaken the glass, leading to cracks later.

Can Small Objects Damage My Windshield?

Yes! Even tiny debris can cause small cracks that grow over time. We recommend you avoid parking under trees or near gravel piles to reduce the risk.

Can a Poor Installation Cause Windshield Cracks?

Yes! If a windshield isn’t installed correctly, it can develop stress cracks over time. Always use a trusted professional for installation.

Why Did My Windshield Crack Overnight?

Windshields can crack overnight due to:

  • Sudden temperature changes (hot days, cold nights).
  • Manufacturing defects or poor installation.
  • Impact from small debris or weather conditions.
  • Vandalism or improper use of suction-mounted accessories (like dash cams).

If you notice a crack, get it checked before it gets worse!