Induced demand is real: Commutes on Houston's 26-lane freeway take 51% longer after expansion

A massive freeway expansion only led to longer drive times, showing that building more lanes won't solve congestion.

1 minute read

August 3, 2026, 6:00 AM PDT

By Diana Ionescu @aworkoffiction


Aerial of I-10 freeway interchange in Houston, Texas.

Interstate 10, also known as the Katy Freeway, in Houston, Texas. | Trong Nguyen / Shutterstock

A $3 billion freeway expansion in Houston highlights the impact of induced demand, showing that even expanding Interstate 10 to 26 lanes didn't speed up traffic.

In fact, writes Daniel Moran in Space Daily, after dropping initially, travel times on the Katy Freeway got longer. The drive on one stretch of the freeway took up to 51% longer after the widening. "What the data shows is that the gains evaporated within a few years of opening and then kept heading the wrong way," Moran adds. 

Yet Houston continues to expand its freeways. "The agency’s own construction announcement describes a $13 billion effort to expand roadway capacity and reduce congestion, and quotes the chairman of the Texas Transportation Commission on getting Texans out of traffic faster."

Saturday, August 1, 2026 in Space Daily

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