Nightly lane closures began July 28 as part of the expansion of Sam Rayburn Tollway to four lanes.  Lanes included are all lanes of northbound Preston Road between the northbound and southbound lanes of SH 121 and the westbound to eastbound Preston Road U-turn lane. The affected lanes will be closed from 10 p.m.-5 a.m. for Sunday-Thursday nights until Aug. 16. All closures are weather permitting. An additional lane is being constructed along the median in each direction of the tollway. The estimated completion for this project is late 2021. Improvements are being made to ramps as of late summer, according to the North Texas Tollway Authority’s summer progress report. Also included in this report are the work statuses for intersection bridge decks along the tollway. Preston has reached the demolition stage, while Parkway Boulevard and Coit Road have reached the foundation stage. Rasor Boulevard/Hillcrest Road and Legacy Drive are marked as at the column stage. The purpose of the widening project is to improve regional mobility in expectation of the North Texas population increase to more than 11 million people in coming decades.