92 Ill. Adm. Code 1535.366
Temporary STOP Signs
Section 1535.366 Temporary STOP Signs
A rail carrier shall install temporary STOP signs whenever
the Commission authorizes the installation of automatic flashing light signals
or automatic flashing light signals and gates at existing public highway-rail
grade crossings equipped with crossbuck warning signs. The temporary STOP signs
shall remain in place until the luminous flashing signal or crossing gate
devices have been installed. The rail carrier is responsible for the cost of
the installation and subsequent maintenance of any required temporary STOP
signs.