Des Moines' most hated highway spot

State of play: The West Mixmaster is a partial cloverleaf interchange connecting I-235, I-80 and I-35 near West Des Moines and Clive.

Yes, but: It's 58 years old and traffic has increased dramatically since then, Andy Loonan with the Iowa Department of Transportation tells Axios.

• Back then, 28,000 daily vehicles passed through. It's now more than doubled, to 75,000 cars a day.

What's happening: The Iowa DOT wants to modernize the West Mixmaster by removing the cloverleaf ramps to construct flyover ramps instead, similar to the nearby Urban Loop.

• Flyover ramps give vehicles more space to get on and off the interstate, Loonan says.
• The first loop planned for demolition is I-235 west to I-35 south, which should give some immediate congestion relief.
• "We know it needs to be done," Loonan says.

What's next: DOT is writing a safety report to send to the Federal Highway Administration to get approval for the $300 million project.

• The goal is to have the first loop gone by 2027.