MoDOT is in the final months of conducting a study on improving I-270 North from the intersection of I-70 and the Chain of Rock Bridge, which is a about 15 miles in length and encompasses approximately 16 interchanges. The entrance and exit ramps at Dunn Road, that require crossing oncoming traffic, are also being studied. For more information, see http://www.modot.org/stlouis/I-270North.htm.

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