Hawaii destinations for In between these two extremes, there are several intermediate cases exhibiting some but not all aspects of public goods. Some goods are non-excludable but still rivalrous, like a free parking spot: Everyone can use it, as long as it is not already occupied. Others are non-rivalrous but still excludable (club goods, below). Finally, the principle of non-rivalry may apply within certain limits only: A highway is a public good unless it is close to being congested, at which point additional users will begin to have a negative impact on the travel time of others. The free-rider problem. Virtually all economies have a need for goods that are inherently public in nature, such as transportation and communication networks, recreational parks, etc. The availability of these commodities creates economic value, but the extent to which these goods can be provided by private firms is limited. Hawaii destinations 2016.