Prepare for Nightly DNT Closures March 18-21North Texas Tollway Authority Traffic Advisory: Planned nightly closures for Dallas North Tollway (DNT) Widening Project - March 18-21 (weather permitting)The closures are required to place concrete, and the east- and westbound Sam Rayburn Tollway (SRT) direct-connector ramps to northbound DNT, and a northbound right lane from Headquarters to Gaylord Pkwy. will be closed overnight (Tue., 3/18 – Fri., 3/21, 10 p.m. – 5 a.m.)Please see map above for detours and consider using Waze to navigate around the closure.