Understanding Dallas's geography
Why Dallas's drive times defy radius math.
The DFW freeway network — 635, 820, the Tollway, Sam Rayburn, the President George Bush — is dense and toll-heavy, which means free-route isochrones will systematically understate reach compared to toll-included routing. North Texas continues to absorb Fortune 500 relocations into Plano, Frisco, and Legacy West, which has dragged the metro's economic center of gravity steadily north and made the Tollway corridor one of the strongest retail spines in the country. South of I-30, drive-times remain typical of a major Sun Belt metro but with materially different income demographics.
Franchise developers should model DFW with toll-routes enabled and pay particular attention to the 121/Sam Rayburn corridor connecting Frisco, McKinney, and Allen, where household growth and income both stack favorably. The Mid-Cities (Grapevine, Southlake, Coppell, Irving) function as a separate sub-market with its own drive-time logic anchored by DFW Airport. A single DFW-wide trade-area template will misjudge site potential by 30%+ in either direction depending on submarket.