§ 414.04 SIGNAL TO CONTROL LANE DIRECTION OF TRAVEL.
   When lane-use control signals are placed over individual lanes of a street or highway, these signals shall indicate and apply to drivers of vehicles as follows:
   (a)   A steady (downward) green arrow. Vehicular traffic may travel in any lane over which a green arrow signal is shown.
   (b)   A steady yellow "X". Vehicular traffic is warned to vacate in a safe manner any lane over which the signal is shown to avoid occupying that lane when a steady red "X" signal is shown.
   (c)   A flashing yellow "X". Vehicular traffic may use with proper caution any lane over which this signal is shown for only the purpose of making a left turn.
   (d)   A steady red "X". Vehicular traffic shall not enter or travel in any lane over which this signal is shown.
(R.C. § 4511.131)