The single lane closure on I-29 will be in place beginning at 8 p.m. at mile marker 74 in Harrison County to prepare the area for the sign installation. All lanes of southbound I-29 will be closed briefly twice while the contractor lifts the sign trusses into place. Each of the two full closures will be in place for up to 20 minutes. All traffic lanes are expected to be reopened by midnight.

The Iowa DOT urges motorists to plan ahead for these closures, obey all posted signs, limit distractions in the work zone and wear seat belts.