Welcome to the Dallas / Fort Worth Metroplex -DFW, the largest inland metropolitan area in the United States. The 2015 official estimate U.S. Census has the Dallas–Fort Worth Metroplex at 7,102,796, making it the largest metropolitan area in the South.
The Metroplex has the second-largest number of freeway miles per capita in the nation, and like most major metropolitan areas in Texas, most interstates and freeways have access or frontage roads where most of the businesses are located.
North-south interstates include I-35 and I-45. East-west routes include I-30 and I-20. I-35 splits into I-35E and I-35W from Denton to Hillsboro: I-35W goes through Fort Worth while I-35E goes through Dallas. I-30 connects Dallas and Fort Worth, and I-45 connects Dallas to Houston.
HOV lanes exist along I-35E, I-30, I-635, US 67, and US 75. I-20 bypasses both Dallas and Fort Worth to the south while its loop, I-820, goes around Fort Worth. I-635 splits to the north of I-20 and loops around east and north Dallas, ending at SH 121 north of DFW Airport. I-35E, Loop 12, and Spur 408 ultimately connect to I-20 southwest of Dallas, completing the west bypass loop around Dallas. A large number of construction projects are planned or are already underway in the region to alleviate congestion.