In almost every case, the divided highway is multi-laned in both directions. When on the secondary road, drivers are directed to turn right.
When traffic clears they complete the U-turn and go back through the intersection. Additionally, the U-turn lane is designed for one-way traffic. Similarly, traffic on the divided highway cannot turn left at an intersection with a cross street.
Instead, drivers are instructed to "overshoot" the intersection, go through the U-turn lane, come back to the intersection from the opposite direction, and turn right. When vehicles enter the cross-over area, unless markings on the ground indicate two turning lanes in the cross-over, drivers form one lane. A cross-over with two lanes is designed at high-volume cross-overs, or when the right lane turns onto an intersecting street. In this case, the right lane is reserved for vehicles completing the design.
Most crossovers must be made large enough for semi-trailer trucks to complete the crossover.
This large cross-over area often leads to two vehicles incorrectly lining up at a single cross-over. The maneuver forces the driver to quickly merge into the extreme left lane to complete the turn, usually from a complete stop.
The turning vehicle is potentially a hazard and may cause a disruption in the flow of traffic in the left lane. When the median of a road is too narrow to allow for a standard Michigan left maneuver, a variation can be used that widens the pavement in the opposite direction of travel. This widened pavement is known as a "bulb out"  or a "loon" from the pavement's aerial resemblance to the aquatic bird. In , Michigan lefts were installed in Alabama for the first time, in several locations along heavily traveled U.
Route in metro Birmingham. Their reception has been mixed. The design is relatively common in New Orleans, Louisiana , and its suburb Metairie , where city boulevards may be split by streetcar tracks,  and suburban thoroughfares are often split by drainage canals. Due to its proximity to the Capital Beltway , heavy traffic is handled more safely and efficiently.
North Carolina has been implementing Michigan lefts along US 17 in the southeastern part of the state, outside Wilmington. Reception has been mixed with several accidents occurring per year. At least two Michigan lefts have existed in Texas. One was located at the intersection of Fondren Road and Bellaire Boulevard in Houston from the s through , when it was replaced with conventional left-turn lanes. These were adopted as a short-term solution for traffic issues as development expanded north, but will likely be phased out as US is elevated.
Construction began in summer and was completed in fall In Australia, where traffic drives on the left, the Victorian state government introduced the "P-turn", similar to the Michigan left, at one intersection in This requires right-turning vehicles to turn left then make a U-turn. As of May , the intersection in the southeastern Melbourne suburb of Frankston remains the only one of its kind in the state, and local residents have called for its removal.
Additional P-turns will be added along Hoddle Street to attempt to ease congestion. The design has been proposed in Toronto , Ontario, to relieve motorists who wish to make a left-turn on roadways that will contain a proposed streetcar line by the Transit City project.
Row Expressway , where a narrow-median variant put in place years ago is now seldom used due to the realignment of the expressway in conjunction with the construction of the Herb Gray Parkway. U-turn intersections are very common throughout Mexico, particularly in Mexico City.
This is the design at some busy junctions in Hong Kong. The capital city of Angola, Luanda , makes widespread use of a simplified variant of this type of intersection on its two- and three-lane, median-separated throughways instead of using traffic lights. Larger junctions use this intersection type instead of much more costly grade-separated interchanges. This type of intersection configuration, as with any engineered solution to a traffic problem, carries with it certain advantages and disadvantages and has been subject to several studies.
Studies have shown a major reduction in left-turn collisions and a minor reduction in merging and diverging collisions, due to the shifting of left turns outside the main intersection. Because separate phases are no longer needed for left turns, this increases green time for through traffic.
The effect on turning traffic is mixed. It has been shown to enhance safety to pedestrians crossing either street at an intersection featuring the design since they only encounter through traffic and vehicles making right turns. Turn left once the oncoming lanes are clear. As a rule of thumb, do not turn if oncoming vehicles are less than feet 60 meters away from you.
Once the lanes are clear, you may turn into either the left or right-hand lane if you are turning into a two-lane street. In other words, do not make your left turn too tight. Check for signs prohibiting U-turns. Turn your left signal on and reduce your speed. Once you approach your turn, get as close to the centerline of the road as possible and come to a complete stop.
Observe the traffic and check for oncoming vehicles and motorcycles, as well as pedestrians and bicycles. Do not make a U-turn from the right lane. Turn you steering wheel to the left as far as you can. Do this to prepare for the U-turn. Once the lanes are clear, slightly accelerate and let the steering wheel correct itself to a straight position.
Then turn into the left lane. Avoid making illegal U-turns. When preparing to turn, put your foot on the brake. Ease off the brake and press the gas pedal lightly as you begin to turn. Merge into the flow of traffic as quickly as possible. Not Helpful 5 Helpful Is it against the law to not signal when making turns or changing lanes?
It depends on which state you are residing in. Check your state's driving guidelines.
However, as a general rule of thumb, you should always turn on your blinker when turning. Not Helpful 1 Helpful 7. How do I turn without being close to the curb or almost running into the other car? If you're going to make a turn, drive until the curb is in line with the side of your car. Once you've done that, you can start to steer around making your turn. Not Helpful 12 Helpful Once the right lane is clear, you can proceed to enter the right lane. Not Helpful 4 Helpful 7. In most states if someone is driving too closely behind you and you brake, making them proceed into your vehicle, it's usually their fault.
Search the internet for your exact situation. There's lots of information out there. Not Helpful 1 Helpful 2. Keep your hands at 9 and 3. If it's a hard turn, turn the wheel as far right or left as possible. Make sure you're close to the curb, but not too close. Keep your hands steady through the turn, do not move them all over the place.
When you're done with the turn, loosen your grip on the wheel and let it spin back into place. Not Helpful 2 Helpful 2. How can I make sure not to hit the center island when making a u-turn? The center island will be to your left if you are driving in America.
You can always roll down your window and lean out slightly so you can clearly see your wheel and the island. Just proceed slowly and stay within the bounds of your lane. Not Helpful 0 Helpful 0.