diverging diamond interchange (ddi) in odense, denmark · interchange 52, odense sv on e20. 2. ...
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Diverging Diamond Interchange (DDI) in Odense, Denmark
Interchange 52, Odense SV on E20
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2.
<52> Odense SV
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Existing diamond interchange
Odense SV (from 1985)
3.
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2 signalized intersections on
Assensvej
Traffic forecast 2028
4.
889
859
230
512
898
161
984
619
440
280
984
387
Vehicles per hour (morning)
No bikes
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Original plan (additional lanes)
5.
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Alternative plan (DDI)
6.
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Original plan:
11 primary points of conflict
Conflict points
7.
DDI:
4 primary points of conflict
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Road safety and capacity in a DDI
Road safety:
•US evaluation (DDI in Springfield, Missouri)
• 67 % reduction in injury crashes
• 46 % reduction in all crashes
VISSIM traffic simulation:
•30 % reduction in total travel time compared to the original plan
•70 % reduction in total delay time compared to the original plan
And not the least:
•The DDI removes the queue from the exit ramp out on the motorway
8.
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Challenges• How to make the design self explaining
• How to make the road users familiar with the new design
9.
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Schedule
• Detailed design September 2015 – March 2016
• Tendering April – June 2016
• Construction July 2016 – June 2017
Estimated costs
• 26,4 million DKK (3,5 million EUR)
10.
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A second DDI in Aalborg?
11.