Paragraph 8
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)
both the intermittent red lights of any of the road traffic signals fail.
The audible alarm shall sound if—
any barrier is horizontally dislocated when in the fully lowered position;
the main power supply fails;
both the intermittent red lights of any of the road traffic signals fail.