Construction of Center Junction Diverging Diamond Interchange Set to Begin

SIKESTON – Construction of the Diverging Diamond Interchange at Interstate 55 and Route 61 (mile marker 99) between Cape Girardeau and Jackson, Missouri, is set to begin with a series of lane reductions on I-55 throughout February and March. 

Weather permitting, the following work will take place on I-55 at Exit 99:

  • The right lane of southbound I-55 will be closed from Tuesday, Feb. 18 through Wednesday, Feb. 19 from 8:30 p.m. to 6 a.m. daily, to lengthen the acceleration ramp;
  • The left lane of southbound I-55 will be closed from Thursday, Feb. 20 through Saturday, Feb. 22, to begin construction on the crossover. This closure will be in place 24-hours;
  • The right lane of northbound I-55 will be closed from Monday, Feb. 24 through Friday, Feb. 28 from 8:30 p.m. to 6 a.m. daily to lengthen the acceleration ramp, and;
  • Various lane closures, with a 10-foot width restriction, will take place on northbound I-55 from Monday, March 2 through Friday, April 3 to begin construction for the crossover. These closures will be in place for 24-hours.

The work zones will be marked with signs.  Motorists are urged to use extreme caution while traveling near the area.

For additional information, contact MoDOT’s Customer Service Center toll-free at 1-888-ASK-MODOT (1-888-275-6636) or visit



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