(a) The executive director may restrict a commercial motor vehicle to a specific lane of traffic in a construction or maintenance work zone for a highway that is part of the state highway system if the executive director determines that, based on traffic study performed by the department to evaluate the effect of the restriction, the restriction is necessary to improve safety.     
      (b) The traffic study must include a review of:      
        (1) the percentage of all vehicles in the construction or maintenance work zone that is anticipated to be commercial motor vehicles;       
        (2) the lane configurations in the work zone;       
        (3) lane widths in the work zone;       
        (4) the roadway geometry in the work zone; and       
        (5) the speed limit in the work zone.       
      (c) If the executive director imposes a lane restriction under this section, the department shall erect and maintain official traffic control devices informing the driving public of that restriction. A lane restriction may not be enforced until the appropriate traffic control devices are in place.     
      (d) The executive director may rescind a lane restriction imposed under this section at any time that the executive director determines that the restriction is no longer necessary to improve safety.     
      (e) A lane restriction imposed under this section expires when the lane that is subject to the restriction is no longer in a construction or maintenance work zone.     
      (f) The department shall remove traffic control devices erected under this section if the lane restriction is rescinded under subsection (d) or expires under subsection (e).     
     Source Note:        The provisions of this §25.605 adopted to be effective December 9, 2015, 40 TexReg 8798