Introduction
A Continuous Flow Intersection (CFI) is an innovative intersection design that reduces congestion and increases safety by moving left-turning traffic out of the main intersection. While it may seem unusual at first, CFIs are becoming more common in Utah to handle heavy traffic volumes efficiently.
How a CFI Works
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Left Turns Before the Intersection
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Instead of turning left at the main intersection, vehicles cross over to the left side of the road at a signal before reaching the intersection.
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This allows them to complete their left turn at the same time as through traffic, without waiting for a dedicated left-turn signal.
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Multiple Signals
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Drivers will encounter smaller signals before the main intersection that guide left-turn movements.
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Clear signage and pavement markings direct vehicles into the correct lanes.
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Through Traffic
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Vehicles going straight continue through the main intersection as normal.
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Since left turns are removed, traffic flow is faster and more efficient.
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Steps for Driving Through a CFI
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Approach and Watch for Signs – Look for overhead signs and pavement arrows directing you to the correct lane.
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Follow the Signals – If turning left, follow the crossover signal that moves you to the left side of opposing traffic.
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Proceed Through the Intersection – Once in position, continue through the main intersection at the green light.
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Right Turns and Straight Travel – Follow the standard lanes and signals as you would in a normal intersection.
Benefits of a CFI
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Reduces Delays: Moves more vehicles through each signal cycle.
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Improves Safety: Fewer conflict points than traditional intersections.
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Handles High Volumes: Perfect for busy urban roads and highways in Utah.
Common Mistakes to Avoid
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Getting into the wrong lane before the intersection.
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Hesitating at the left-turn crossover signal.
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Attempting to make last-second lane changes.
Where You’ll See CFIs in Utah
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Several along Bangerter Highway in Salt Lake County.
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Increasingly added to high-traffic urban corridors across the state.
Why It Matters
CFIs may feel confusing the first time, but they are designed to move traffic more safely and efficiently. Learning how to read the signs and follow the signals ensures you can handle them confidently.
✅ Takeaway: A Continuous Flow Intersection allows left turns before the main intersection, keeping traffic moving smoothly. Pay close attention to signs, signals, and lane markings to navigate safely.