There are several different types of Median U-Turns (MUTs) that INDOT uses. The MUT intersection design eliminates the cross-over between the four-lane divided highway. Here are the 3 major types of MUTs INDOT uses:
There are several different types of Median U-Turns (MUTs) that INDOT uses. The MUT intersection design eliminates the cross-over between the four-lane divided highway. Here are the 3 major types of MUTs INDOT uses:
MUT intersections significantly reduce the risk of severe crashes in certain traffic and road conditions. MUTs increase safety by reducing by half or more the number of possible conflicts and the points where two vehicle paths cross.
In a traditional intersection there are 42 different conflict points where an accident can occur. Of those, 24 conflict points can cause serious T-bone or right angle crashes – the crashes most responsible for fatalities and serious injuries at intersections. A MUT intersection can have no more than 29 possible conflict points and some MUT intersections can be designed so that there are zero crossing conflict points.
RCIs eliminate the need for motorists to cross the high-speed lanes of traffic to get to the opposing lanes. Nationwide, statistics show a more than 50% decline in crashes where RCIs are installed. Fatal crashes decline by as much as 85%.
Since 2015, INDOT has installed seven RCIs at four-lane highway intersections in Indiana. These intersections have shown a substantial decrease in fatal and injury crashes since RCI installation.
INDOT has conducted performance analyses of crashes at each RCI, comparing pre-construction crash frequency and severity with post-construction data over similar time periods, ranging from 1½ to 5 years.
In overall effectiveness, INDOT’s analysis showed that the seven RCIs:
INDOT’s analysis showed a dramatic reduction in fatal and injury vehicle crashes at each RCI:
INDOT continues to track the safety performance of these and future RCIs to assess their effectiveness and advance our understanding of the traffic levels, design, and site conditions most suitable for this highway feature.
MUT intersections not only improve safety but reduce intersection delay and overall travel time when operating under the right traffic and road conditions. Although drivers have to travel slightly further to get where they want to go, using MUT intersections can require the same or less time than trying to wait for a safe and appropriate gap to cross traffic. For the RCUT and Boulevard Left, retrofitting a standard intersection will improve traffic capacity by 20% to 50%. This improved traffic capacity is achieved through more efficient traffic signal operation, including better phasing, timing, and progression or coordination with adjacent intersections. Stops are reduced by a third or more.
When operating under the right traffic and field conditions, advantages of the MUT intersection over a standard intersection design include:
Transportation Services Call Center
Indiana Department of Transportation
100 N. Senate Ave., IGCN 755
Indianapolis, IN 46204
855-463-6848
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