|Facility||Financing or operating authority||Location||Length in miles||Toll collection direction||Electronic collection system|
|Dallas North Tollway||NTTA||From I-35E to SH 121||19.5||Both ways||AVI|
|Sam Houston Tollway-East||HCTRA||From East of SH 3 to SH 225||7.6||Both ways||AVI|
|Sam Houston Tollway-West||HCTRA||From US 59, to I-45 (North of Houston)||27.3||Both ways||AVI|
|Sam Houston Tollway-Southwest Beltway||HCTRA||From Houston-US 59 to Houston-SH 288||10.6||Both ways||AVI|
|Sam Houston Tollway-Southeast Beltway||HCTRA||From Houston-I-45 to Houston-SH 288||10.4||Both ways||AVI|
|Hardy Toll Road||HCTRA||From I-45 North to I-610||21.7||Both ways||AVI|
|President George Bush Turnpike||NTTA||From SH 78, Dallas to Midway||15.0||Both ways||AVI|
|Camino Columbia||Camino Columbia, Inc.||From IH 35 to Columbia Solidarity Bridge||22.5||Both ways||AVI|
KEY: NTTA = North Texas Tollway Authority; HCTRA = Harris County Toll Road Authority; AVI = automatic vehicle identification.
SOURCE: U.S. Department of Transportation, Federal Highway Administration, Toll Facilities in the United States: Bridges-Roads-Tunnels-Ferries, Washington, DC: June 2001, available at http://www.fhwa.dot.gov/ohim/tollpage.htm as of Feb. 18, 2002.