East Nippon Expressway Company
A major part of the National Route 466 is known as the , a limited access toll road connecting Tokyo and Yokohama. It is managed by the East Nippon Expressway Company. In addition to its designation as National Route 466, the Daisan Keihin Road is signed as a part of E83 under the "2016 Proposal for Realization of Expressway Numbering".