TYLER, TX (KLTV) - DPS and several other agencies have been participating in a live-action hurricane drill Wednesday.
Authorities say three separate convoy's left Arlington, headed south on 360, east on Interstate 20 to Tyler and then south on US Highway 69 to the coast.
Each convoy had as many as 50 vehicles being escorted by marked police units with emergency lights activated.
They have been traveling below the posted limit in the right lane. The first convoy left at 8 a.m.
Authorities say a few weeks ago the 911 systems in south Texas were overloaded with people's questions about a similar drill.