|Type of railroad||Number of railroads||Miles operated2 United States||Miles operated2 Maryland|
|United States||Maryland||Excluding trackage rights||Including trackage rights||Percent of U.S. total|
|Switching and terminal||213||2||7,425||16||16||0.2|
1 Refers to non-Class I, Canadian-owned lines.
2 Miles operated is in terms of railroad so that a mile of single track is counted the same as a mile of double track. Sidings, turnouts, yard switching mileage, and mileage not operated are excluded. Miles operated under trackage rights provided by another (owning) railroad are included.
1. As defined by the Surface Transportation Board in 2000, a Class I Railroad is a railroad with operating revenues of at least $261.9 million.
2. A Regional Railroad is a non-Class I, line-haul railroad operating 350 or more miles of road or with revenues of at least $40 million or both.
3. A Local Railroad is a railroad which is neither a Class I nor a Regional Railroad, and is engaged primarily in line-haul service.
4. A Switching and Terminal Railroad is a non-Class I railroad engaged primarily in switching and/or terminal services for other railroads.
SOURCES: Association of American Railroads, Railroads and States - 2000, Washington, DC: 2002, available at http://www.aar.org/AboutTheIndustry/StateInformation.asp as of Mar. 19, 2002.