Paragraph 10
The audible alarm shall sound if:
(a)
any barrier is horizontally dislocated when in the fully-lowered position;
(b)
the main power supply fails;
(c)
all the red traffic light signals facing in one direction fail.
The audible alarm shall sound if:
any barrier is horizontally dislocated when in the fully-lowered position;
the main power supply fails;
all the red traffic light signals facing in one direction fail.