This is alist of highways in theHouston–The Woodlands-Sugar Land metropolitan area.
| Designation | Common name | Year of First Freeway Section[1] | Maximum width: mainlanes (HOV)[2] | Maximum Traffic Count, 2001 (AADT)[3] | Maximum Traffic Count, 2009 (AADT)[4] | Maximum Traffic Count, 2012 (AADT)[4] |
|---|---|---|---|---|---|---|
 I-10 | Baytown-East Freeway | 1953 | 10 | 225,640 | 195,000 | 168,000 |
| Katy Freeway | 1956 | 26(4)[5] | 238,520 | 268,000 | 360,000 | |
 I-45 | Gulf Freeway | 1948 | 8(1) | 269,570 | 266,000 | 245,000 |
| North Freeway | 1959 | 10(1) | 291,470 | 317,000 | 312,000 | |
  I-69 /US 59 | Eastex Freeway | 1953 | 10(1) | 211,860 | 195,000 | 205,000 |
| Southwest Freeway | 1961 | 13(1) | 379,550 | 329,000 | 318,000 | |
 I-610 | 610 Loop | 1952 | 10 | 293,460 | 288,000 | 292,000 |
 Sam Houston Tollway | Beltway 8 | 1982 | 9 | 202,900 | 189,000 | 203,410**[1] |
 Fort Bend Tollway | Fort Bend Parkway Toll Road | 2004 | 4 | 9,471**[2] | ||
 Hardy Toll Road | 1987 | 6 | 59,220 | 61,000 | 63,000 | |
 Westpark Tollway | Fort Bend Westpark Tollway | 2004 | 4 | 119,385**[3] | ||
 US 90 | Crosby Freeway | 1991 | 6 | 31,090 | 46,000 | 40,000 |
 US 290 | Northwest Freeway | 1975 | 8(1) | 262,970 | 230,000 | 239,000 |
 Spur 5 | Spur 5 | 1988 | 6 | 54,240 | 37,000 | 33,000 |
 Spur 330 | Decker Drive | 2001 | 6 | 32,890 | 37,000 | 47,000 |
 Spur 527 | The Downtown Split[6] | 1961 | 6* | 93,410 | 64,000 | 65,000 |
  SH 99 /SH 99 Toll | Grand Parkway | 1994 | 4 | 36,200 | 68,000 | 47,000 |
 SH 146 | Baytown Freeway | 1996 | 8 | 74,670 | 73,000 | 76,000 |
 SH 225 | La Porte Freeway | 1966 | 8 | 152,780 | 133,000 | 113,000 |
  SH 249 /Tomball Tollway | Tomball Parkway | 1990 | 8 | 119,780 | 142,000 | 151,000 |
 SH 288 | South Freeway | 1980 | 8 | 178,490 | 172,000 | 163,000 |
 FM 1764 | Emmett F. Lowry Expressway | 4 | 48,050 | 40,000 | 35,000 | |
| ** For these toll roads, this represents the highest AADT as measured at a toll booth, but not necessarily the highest traffic at any point along the toll road. | ||||||
SH 99 Toll - Sections A, B, and C of theGrand Parkway are in various stages of the planning process.Spur 5 - south-southeast of downtown. The mainlanes planned to be built from its present terminus near University Drive (adjacent to theUniversity of Houston) to south ofBeltway 8.Fort Bend Tollway - TheFort Bend Tollway is planned to eventually be extended from its northern terminus atUS 90A to the southwest corner of the 610 Loop.Hardy Toll Road - TheHardy Toll Road has a proposal to be extended from its southern terminus at the North Loop to Downtown Houston.I-69 /US 59 - From the Harris-Fort Bend county line to the Harris-Montgomery county line for a total distance of 75 miles.Interstate 69 will travel from theU.S.–Mexico border in Brownsville, TX to theU.S.–Canada border inPort Huron, MI when completed in the future.US 59 travels from theU.S.–Mexico border in Laredo, TX to the U.S.–Canada border nearLancaster, MN. 35 miles of US 59 have been designated and dual signed as I-69/US 59 northeast ofDowntown Houston.[7] 28 miles of US 59 have been designated and dual signed as I-69/US 59 southwest ofDowntown Houston.[8] 12 miles of US 59 have been designated and dual signed as I-69/US 59 throughDowntown Houston.[9]
