Critical intensity conjecture for the Manhattan grid model

Let $I_c>0$ denote the critical intensity in the phase transition theorem for $I=(\mu+\mu)\cdot\lambda$, and consider the Boolean model generated by a homogeneous Poisson point process in two dimensions. Critical intensity conjecture. The quantity $I_c$ is the critical intensity for the Boolean model of a homogeneous Poisson point process in two dimensions.

The conjecture identifies the critical intensity of the Manhattan grid model's limiting high-street-intensity regime with the corresponding planar Boolean-model threshold. The supplied text gives no resolution, so the claim remains open.