San Antonio Prepares for Second Diverging Diamond Intersection Construction

San Antonio, TX, September 23, 2026 —

San Antonio is set to begin construction on its second diverging diamond intersection (DDI), a traffic design intended to improve traffic flow and reduce accidents. The specific start date for construction was not provided in the available information.

Details regarding the exact location of this new intersection have not been publicly disclosed. A diverging diamond intersection is a type of diamond interchange where the two one-way roadways on the bridge cross the highway on the opposing side to form two DDI ramps. This traffic pattern allows traffic to travel on the opposite side of the road than is conventional for a period, which can simplify left turns onto the freeway and reduce the number of traffic signals.

The trend summary indicates that construction is scheduled to begin, but it does not specify which city department or transportation authority is overseeing the project, nor does it provide details about the project’s budget or expected completion timeline. The contractor’s name and specific construction phases were also not made available.

This project marks San Antonio’s second implementation of the DDI design. Information about the first diverging diamond intersection in the city, including its location, construction details, and impact on traffic, was not included in the summary. Further details regarding the necessity for this second intersection, potential traffic disruptions during construction, and the projected benefits are expected to be released as the project progresses.

The city has not yet released a timeline for when further information, such as the project’s specific location or construction start date, will be made public.

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