Due to flooded roadways, Route 21  is detoured along IH-35 North and South frontage roads near Splashtown.

Outbound
From IH-35 North frontage road at Splashtown
Enter IH-35 North main lanes
Exit Binz-Engleman (Exit 161) to frontage road
Continue regular route

Inbound
From IH-35 frontage road before Salado Creek
Enter IH-35 South main lanes
Exit AT&T Parkway (Exit 160) to frontage road
Continue regular route