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City and ODOT preview diverging-diamond interchange at Memorial and 169/Creek Turnpike
Summary
Officials described a $13 million diverging-diamond interchange project meant to reduce congestion and crashes at the Memorial/169/Creek Turnpike corridor, saying it is roughly 50-50 federal and state funded and will be the city's second DDI when completed.
City staff and project communications described a diverging-diamond interchange (DDI) project at Memorial and the 169/Creek Turnpike corridor intended to reduce congestion and collisions and improve pedestrian safety.
Officials said the project is approximately a $13,000,000 construction effort, funded about "50–50 between federal funding and state funding." The DDI design temporarily moves traffic to the opposite side of Memorial under the highway to allow simpler left-turn movements onto on-ramps. City materials said the corridor carries about 47,000 vehicles per day and that the intersection experiences roughly 34 crashes per year.
Speakers noted that DDIs have reduced collisions by about one-third in other communities and increase corridor efficiency. The transcript said Tulsa would be the second DDI in Oklahoma when complete (after an Elk City interchange), with another under construction in a different location.
Officials asked for patience during construction and pointed to the city's South Tulsa Roads web page and ODOT for more information. The provided excerpt did not include a construction schedule or a final contractor award.
