Duplessis Road closure to continue until noon Thursday Duplessis Road closure to continue until noon Thursday | River Parishes bureau May 20, 2014 Comments PRAIRIEVILLE — Duplessis Road, a key cut-through road in northwestern Ascension Parish, will continue to be closed near Airline Highway until noon Thursday, parish officials said Wednesday. The road has been closed since Tuesday morning at the Kansas City Southern Railway Co. tracks but was supposed to reopen by 4 p.m. Wednesday. That deadline has since been extended, parish officials said in a news release. The railroad is trying to repair tracks to make vehicle passage smoother. The tracks run parallel to Airline about two-tenths of mile west of the highway. Alternative routes from Airline into the neighborhoods surrounded by Airline, I-10, La. 621 and La. 73 include La. 73, Post Office Road and La. 621.