In November 2019, the Delaware Valley Regional Planning Commission (DVRPC) released the final Kennett Area Freight Transportation Study. This 2019 work program item investigated a six municipality study area in and around Kennett for ways to minimize the community impacts of freight movements and increase public safety.
Your graph on page 20 of the mushroom supply chain is missing the component of the materials (Mulch/mushroom hay) being delivered to the soil compost distributor. The contribution probably exceeds the Mushroom Compost to Commercial Consumers component but comprises more tractor/trailer elements.