CC-215 Beltway (S) & I-15 SCD1

The CC-215 and I-15 interchange in the southwest valley is a critical connector between the Beltway’s southern arc and the interstate spine. The braided ramp configuration places multiple merging and diverging traffic streams in close proximity at fully freeway-level speeds. Nearly every vehicle here is making a deliberate highway-to-highway transition — high speeds and high stakes for any driver who misjudges a lane change or gap in traffic.

The story at this interchange is dramatic improvement. 91 crashes in 2022 dropped to 46 in 2023 and just 11 in 2024 — an 88% reduction from peak. That’s the steepest crash decline of any intersection in the dataset and almost certainly reflects a specific infrastructure change. One fatality over three years and 108 total injuries underscores that when crashes do happen at freeway speeds, people get hurt.