Constructive notice under section 835.2 asks whether the condition existed long enough, and was obvious enough, that a reasonably diligent public entity would have discovered it through routine inspection. Courts evaluating constructive notice typically consider factors such as the obviousness of the condition, whether it developed gradually or suddenly, the entity's own inspection practices and how consistently they were followed, and any relevant safety or engineering standards applicable to that class of roadway. For an industrial corridor carrying heavy commercial truck traffic, the constructive notice analysis benefits from evidence that the wear pattern or defect was the kind of gradual deterioration that develops predictably under sustained heavy truck loads, rather than a sudden, unforeseeable event. Retaining a pavement or civil engineering expert early in the case to opine on how long the specific defect likely took to develop can be decisive in establishing that the city, through reasonable inspection, should have caught the problem before the injury occurred.