Design of lane-use control signals (Repealed)

All lane-use control signal indications shall be in units with rectangular faces. Nominal minimum height and width of each face shall be twelve inches for typical applications. Each lane to be reversed shall have signal faces with a downward green arrow on an opaque background, and a red x symbol on an opaque background. Signal faces with a yellow x symbol on an opaque background may be provided. Each nonreversible lane immediately adjacent to a reversible lane shall have a downward green arrow displayed to traffic traveling in the permitted direction and a red x symbol displayed in the opposite direction. Other nonreversible lanes on any street so controlled may also be provided with these indications. The indications provided for each lane may be in separate units or may be superimposed in the same unit. When in separate units, the red x symbol shall be on the left, the yellow x symbol, if used, shall be in the middle and the downward green arrow symbol shall be on the right.