Can B recover for public nuisance if A digs an unguarded trench across the highway and B drives into it?

B can recover for public nuisance because the presence of an unguarded trench across a public highway creates a significant hazard to all who use that highway, contributing to a public nuisance. Public nuisance occurs when a party's actions or omissions interfere with the public's right to use and enjoy a common resource, like a highway, in a safe manner.

The trench represents an unreasonable interference that affects not just B, but all individuals who travel that road. This is a critical element when assessing public nuisance claims—namely, the impact of the defendant’s actions on the broader community. Moreover, the lack of guardrails or warning signs further exacerbates the danger, reinforcing the notion that the trench is an unreasonable danger to the public.

In contrast, although recklessness or individual behavior can be considered in determining liability, the primary concern in a public nuisance claim is the collective harm posed by the nuisance itself, rather than the behavior of the individual plaintiff. Thus, B's potential recklessness does not negate the public nature of the nuisance caused by A's actions. Hence, B has a valid recovery claim based on the unreasonable risk created by the unguarded trench.