What to do if a stone damages your car on a Portuguese highway

In Portugal, vehicle damage from stones on highways, like cracked windshields, may not always result in compensation. Compensation depends on the stone's origin and circumstances. If another vehicle caused it, claims are rare. If a stone was already on the road, the highway concessionaire might be liable if negligence is proven. Damage from construction debris can also lead to claims if proper signage was absent. Standard third-party liability insurance typically does not cover these damages.