Driving with a cracked windscreen in Queensland isn't automatically illegal — but it can be, and a bad one will fail a safety certificate (the QLD roadworthy). Whether your car is fine to drive comes down to two things: how big the damage is and where it sits on the glass.
The short answer
A small stone chip away from the driver's eyeline is usually fine — and almost always repairable. But damage that sits in the driver's line of sight, or a crack that's spread across the glass, can make the car unroadworthy and is a defect an officer or inspector can pull you up on. If it's blocking your view, it needs sorting.
It all comes down to the driver's view
Roadworthy rules care most about the area the driver actually looks through — the part of the windscreen swept by the wipers in front of the steering wheel. Damage there is judged far more strictly than damage down in a corner or over on the passenger side. As a practical guide, this is the rule of thumb we work to:
◢ The damage, and the critical vision area
Bullseye
A clean dark circle where a stone hit square-on — one of the most repairable breaks.
Star break
A central chip with short cracks radiating out like a star. Repairable if the legs are short.
Horseshoe
A partial, U-shaped ring of damage — half a bullseye. Usually a straightforward resin fix.
Crater / chip
A pit where a piece of the outer glass has flaked away. Repairable when small and shallow.
Crack
A line that runs across the glass. Short, fresh cracks can be repaired; long or edge cracks can't.
◢ The rule of thumb
Damage inside the driver's critical vision area can usually be repaired up to about 25 mm; outside that zone the limit is roughly 100 mm. Edge cracks and anything in your direct eyeline are the common reasons a repair becomes a replacement. Not sure which you've got? Send a photo — we'll tell you straight, free.
When a windscreen becomes a defect
As a general guide, your windscreen is likely to fail a safety certificate (and be a roadworthy concern) when there's a crack longer than about 150 mm, any damage bigger than roughly 16 mm in the driver's critical vision area, or damage that's clearly distorting or blocking the driver's view. The inspector has the final say, so if you're booking a safety certificate it's worth getting the glass sorted first.
Beyond the rules, there's the safety side: a windscreen is a structural part of your car — it helps support the roof in a rollover and backs the passenger airbag. A big crack weakens it exactly when you'd need it most.
Repair, or replace?
Caught early, most chips are a quick resin repair that keeps your factory glass — here's how to tell if a chip can be repaired. Once a crack is long, deep or in your eyeline, a full replacement is the safe and legal call — and on most modern cars that also means an ADAS calibration afterwards.
Not sure which side of the line your damage falls on? Send us a photo and your rego and we'll tell you honestly — we're mobile right across the Sunshine Coast, from Caloundra to Noosa.
This is general information, not legal advice — roadworthy rules can change and the inspecting officer has the final say. If in doubt, get the glass checked.