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of the overall length of I-35 than any other state, almost one-third of the entire length.

The Interstate is currently undergoing an extensive renovation and expansion project, known as "My35". The project includes work on portions of the Interstate from Dallas south to Laredo. Once complete, the highway will span three lanes in each direction from Hillsboro to San Antonio.

Route description

I-35 has been designated the Texas portion of the Purple Heart Trail. Signage noting this

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