Business Loop I-35 - Laredo

Business Loop I-35A originates south from the IH 35 southbound off-ramp (Exit 3 B) to San Bernardo Avenue. San Bernardino Avenue (old U.S. 81 / U.S. 83 Business) forms a frontage road to the freeway south until the IH 35 eastward shift at Calton Road / Exit 3 A. The Business Loop stays one block west of Interstate 35 to the south end, where the freeway separates into the couplet of Santa Ursula Avenue south and San Darion Avenue north at Victoria Street.

Business Loop I-35 travels a series of one-way streets from the couplet of Houston Street west and Matamoros Street east through Downtown Laredo. The route southbound takes Houston Street west four blocks from San Bernardino Avenue to Salinas Avenue south. Salinas Avenue continues the route to Zaragoza Street, which flows east one block to Convent Avenue north as it exits the customs facility from the Americas International Bridge. Convent Avenue (old U.S. 81) leads Business Loop I-35 north back to Matamoros Street, which returns the route east to IH 35 via San Dario Avenue north.

Business Interstate Highway Number 35-A was established on August 23, 1991 at a length of approximately 4.0 miles. The 2.8 mile section along San Bernardino Avenue was transferred from U.S. 83 Business.