The first train to operate over any section of mainline track each day or after an interruption of service exceeding one hour. Train operators shall operate at restricted speed and be alert, stopping short of: * Obstructions on the track. * Damage to track, contact rail or wayside signals. * Improperly aligned switches. * Conditions which may be hazardous to the operation of trains. Should hazardous conditions exist, trains shall be stopped and the condition reported to the Central Control Facility (CCF).