TxDOT explains benefits, meaning of new flashing arrow traffic signals Wed, 03/20/2019 - 12:00am The traffic upgrades TxDOT is making on U.S. Highway 84 in Limestone and McLennan counties should be finished soon, and ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about TxDOT explains benefits, meaning of new flashing arrow traffic signals