§ 70.22 SIGNALS OVER REVERSIBLE LANES.
   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 and trackless trolleys 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 such 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) ('81 Code § 70.12)