To turn left at a Reduced Conflict Intersection, you don’t turn left from the side road at all. You turn right onto the main road, drive a few hundred feet, and make a U-turn at a designated median opening. Once you’ve completed the U-turn, you’re traveling in the direction you originally wanted. The median physically blocks a direct left turn across traffic, so the right-then-U-turn sequence is the only legal way through.1Federal Highway Administration. Reduced Left-Turn Conflict Intersections
The Left Turn, Step by Step
The maneuver has four parts. Follow the signs and pavement markings at each stage; they’re placed specifically to walk you through it.
- Turn right onto the main road. When you reach the intersection from the side road, signage directs you right. A direct left is not available because the median is closed.
- Move toward the left lane. After you merge into traffic, watch for signs pointing to the U-turn opening and work your way into the leftmost lane or a designated U-turn lane.
- Make the U-turn. The median opening sits roughly 400 to 1,000 feet past the intersection. Yield to oncoming traffic, or follow the signal if one is present, then complete the U-turn.2Federal Highway Administration. Restricted Crossing U-Turn Intersection
- Continue in the direction you wanted. You’re now heading the opposite way on the main road, which is where a conventional left turn would have put you.
Start to finish, the detour adds about 30 seconds compared to a conventional left. In exchange, you skip the hardest part of a traditional intersection: judging gaps across four lanes of high-speed traffic from a stop sign.
Going Straight Across Works the Same Way
If you’re on the side road and need to cross to the opposite side rather than turn left, the median blocks that movement too. The sequence is identical: turn right onto the main road, use the U-turn opening to loop back, then turn right onto your side road from the opposite direction.1Federal Highway Administration. Reduced Left-Turn Conflict Intersections Signage will guide you through each step.
Left Turns From the Main Road Are Not Restricted
If you’re already traveling on the main road and want to turn left onto a side street, you can usually make that turn directly. Most RCUT designs keep a standard left-turn lane on the main road because that movement doesn’t create the same crossing conflicts the design was built to eliminate.1Federal Highway Administration. Reduced Left-Turn Conflict Intersections You yield to oncoming traffic and turn as you normally would. The restrictions apply only to movements starting from the side road.
Common Mistakes To Avoid
The biggest error drivers make at a Reduced Conflict Intersection is seeing the closed median, panicking, and improvising. Trust the signs. They are placed to route you through the correct sequence even when the path feels indirect.
Timing is the other common problem. You merge onto a high-speed road and then need to decelerate into a U-turn lane within a few hundred feet. Get up to the main road’s speed quickly, start watching for the U-turn signs immediately, and begin moving left before the opening is close. Drivers who wait until the last moment to change lanes often miss the opening entirely and end up well past it before they can correct.
Expect other drivers to be unsure, especially at newer installations. Some will hesitate, stop unexpectedly in through lanes, or attempt a left into the closed median. Leave extra following distance.
Why the Detour Exists
A Reduced Conflict Intersection, sometimes called a Restricted Crossing U-Turn, J-turn, or superstreet, is built around a divided median that removes the two most dangerous movements from a side road: the left turn and the straight-across crossing. Converting a two-way stop-controlled intersection to this design reduces fatal and injury crashes by 54 percent, and unsignalized versions see reductions as high as 63 percent.1Federal Highway Administration. Reduced Left-Turn Conflict Intersections The extra 30 seconds buys a dramatically safer trip through the intersection, which is why these designs keep appearing on four-lane divided highways across the country.