Rhode Island Code of Regulations
Title 815 - Division of Public Utilities and Carriers
Chapter 50 - Common Carriers
Subchapter 05 - Motor Carriers of Property
Part 1 - Transportation Provided by Motor Carriers of Property (815-RICR-50-05-1)
Section 815-RICR-50-05-1.9 - Vehicle Marking and Identification

The name as it appears on the certificate, or permit, street address, town or city, along with the certificate or permit number shall be displayed on both sides of every vehicle utilized as a common or contract carrier in letters visible at 50 feet. Appropriate abbreviations are acceptable. If business names are used in addition to the name on the certificate, the name must be registered with the Division. Only one business name can be used.