| Chicago Transit Authority | DO | Active | |
| Des Moines Area Regional Transit Authority | DO | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| Chicago Transit Authority | DO | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| METRO Regional Transit Authority | DO | Active | |
| Stark Area Regional Transit Authority | DO | Active | |
| The Greater Cleveland Regional Transit Authority | DO | Active | |
| Metropolitan Transit Authority of Harris County, Texas | DO | Active | |
| Capital Metropolitan Transportation Authority | PT | Active | |
| Santa Clara Valley Transportation Authority | DO | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| Central Ohio Transit Authority | DO | Active | |
| Chicago Transit Authority | DO | Active | |
| Pace, the Suburban Bus Division of the Regional Transportation Authority | DO | Active | |
| Fort Worth Transportation Authority | PT | Active | |
| Metropolitan Transit Authority of Harris County, Texas | DO | Active | |
| Capital Metropolitan Transportation Authority | PT | Active | |
| Orange County Transportation Authority | DO | Active | |
| Orange County Transportation Authority | PT | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| Chicago Transit Authority | DO | Active | |
| Fort Worth Transportation Authority | PT | Active | |
| Metropolitan Transit Authority of Harris County, Texas | DO | Active | |
| Metropolitan Tulsa Transit Authority | DO | Active | |
| New Orleans Regional Transit Authority | DO | Active | |
| Bi-State Development Agency of the Missouri-Illinois Metropolitan District | DO | Active | |
| Regional Public Transportation Authority | PT | Active | |
| Los Angeles County Metropolitan Transportation Authority | DO | Active | |
| Los Angeles County Metropolitan Transportation Authority | PT | Active | |
| Stanislaus Regional Transit Authority | PT | Active | |
| Southwest Ohio Regional Transit Authority | DO | Active | |
| The Greater Cleveland Regional Transit Authority | DO | Active | |
| The Greater Cleveland Regional Transit Authority | DO | Active | |
| The Greater Cleveland Regional Transit Authority | DO | Active | |
| Central Ohio Transit Authority | DO | Active | |
| Central Ohio Transit Authority | DO | Active | |
| Duluth Transit Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Rhode Island Public Transit Authority | DO | Active | |
| Rhode Island Public Transit Authority | DO | Active | |
| Capital District Transportation Authority | DO | Active | |
| Niagara Frontier Transportation Authority | DO | Active | |
| Niagara Frontier Transportation Authority | DO | Active | |
| Greater Richmond Transit Company | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Hillsborough Area Regional Transit Authority | DO | Active | |
| Charleston Area Regional Transportation Authority | PT | Active | |
| Charleston Area Regional Transportation Authority | PT | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| New Jersey Transit Corporation | DO | Active | |
| Washington Metropolitan Area Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Transit Authority of River City | PT | Active | |
| Transit Authority of River City | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Puerto Rico Maritime Transport Authority | PT | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| New Jersey Transit Corporation | DO | Active | |
| Staten Island Rapid Transit Operating Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Washington Metropolitan Area Transit Authority | DO | Active | |
| Rhode Island Public Transit Authority | DO | Active | |
| Rhode Island Public Transit Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Pioneer Valley Transit Authority | PT | Active | |
| Pioneer Valley Transit Authority | PT | Active | |
| Worcester Regional Transit Authority | PT | Active | |
| Greater Bridgeport Transit Authority | PT | Active | |
| MetroWest Regional Transit Authority | PT | Active | |
| Capital District Transportation Authority | DO | Active | |
| Central New York Regional Transportation Authority | DO | Active | |
| Port Authority Transit Corporation | DO | Active | |
| New Jersey Transit Corporation | PT | Active | |
| New Jersey Transit Corporation | DO | Active | |
| New Jersey Transit Corporation | DO | Active | |
| MTA Bus Company | DO | Active | |
| Kanawha Valley Regional Transportation Authority | DO | Active | |
| The Tri-State Transit Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | PT | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Washington Metropolitan Area Transit Authority | PT | Active | |
| Washington Metropolitan Area Transit Authority | DO | Active | |
| Washington Metropolitan Area Transit Authority | DO | Active | |
| Westmoreland County Transit Authority | DO | Active | |
| Transit Management of Central Maryland, Inc. | DO | Active | |
| Ms Coast Transportation Authority | DO | Active | |
| Lexington Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Chatham Area Transit Authority | DO | Active | |
| Central Florida Regional Transportation Authority | DO | Active | |
| Jacksonville Transportation Authority | DO | Active | |
| Charleston Area Regional Transportation Authority | PT | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Hyannis Harbor Tours, Inc. | DO | Active | |
| New Jersey Transit Corporation | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Transit Management of Central Maryland, Inc. | DO | Active | |
| Merrimack Valley Regional Transit Authority | PT | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |
| Delaware Transit Corporation | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Niagara Frontier Transportation Authority | DO | Active | |
| Washington Metropolitan Area Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Rhode Island Public Transit Authority | DO | Active | |
| Rhode Island Public Transit Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Greater Bridgeport Transit Authority | PT | Active | |
| New Jersey Transit Corporation | DO | Active | |
| Greater Richmond Transit Company | DO | Active | |
| Washington Metropolitan Area Transit Authority | DO | Active | |
| Transit Management of Central Maryland, Inc. | DO | Active | |
| Transit Management of Central Maryland, Inc. | DO | Active | |
| Susquehanna Regional Transportation Authority | PT | Active | |
| Chattanooga Area Regional Transportation Authority | DO | Active | |
| Metropolitan Atlanta Rapid Transit Authority | DO | Active | |
| Chatham Area Transit Authority | DO | Active | |
| Hillsborough Area Regional Transit Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Massachusetts Bay Transportation Authority | DO | Active | |
| Greater Bridgeport Transit Authority | PT | Active | |
| Staten Island Rapid Transit Operating Authority | DO | Active | |
| MTA Bus Company | DO | Active | |
| Greater Richmond Transit Company | PT | Active | |
| Greater Richmond Transit Company | DO | Active | |
| Lehigh and Northampton Transportation Authority | DO | Active | |
| Southeastern Pennsylvania Transportation Authority | DO | Active | |