The lights shall be arranged to flash alternately, the number of flashes per minute to conform to current AREMA specifications and AREMA specifications shall constitute the minimum requirements of this Commission with respect to range and beam intensity of incandescent lamp and light emitting diode (LED) signals.
Ill. Admin. Code tit. 92, § 1535.343
Amended at 29 Ill. Reg. 20376, effective December 15, 2005