e alert system has been activated. (b)  In addition to its duties as a state agency under Subsection (a), the Texas Department of Transportation shall establish a plan for providing relevant information to the public through an existing system of dynamic message signs located across the state.  Added by Acts 0000, 00th Leg., R.S., Ch. 000 (S.B. 0), Sec. 0, eff. June 0, 0000.   Sec. 000.000.  ACTIVATION OF 