<s>
SPECS	B-Algorithm
is	O
an	O
average	O
speed	O
measuring	O
speed	B-General_Concept
camera	I-General_Concept
system	O
introduced	O
in	O
1999	O
.	O
</s>
<s>
SPECS	B-Algorithm
was	O
originally	O
manufactured	O
by	O
Speed	O
Check	O
Services	O
Limited	O
,	O
from	O
which	O
it	O
takes	O
its	O
name	O
.	O
</s>
<s>
SPECS	B-Algorithm
cameras	O
operate	O
as	O
sets	O
of	O
two	O
or	O
more	O
cameras	O
installed	O
along	O
a	O
fixed	O
route	O
that	O
can	O
be	O
from	O
75	O
metres	O
(	O
246	O
feet	O
)	O
.	O
</s>
<s>
They	O
work	O
by	O
using	O
an	O
automatic	B-Application
number	I-Application
plate	I-Application
recognition	I-Application
(	O
ANPR	B-Application
)	O
system	O
to	O
record	O
a	O
vehicle	O
's	O
front	O
number	O
plate	O
at	O
each	O
fixed	O
camera	O
site	O
.	O
</s>
<s>
There	O
is	O
a	O
popular	O
misconception	O
that	O
the	O
Home	O
Office	O
has	O
approved	O
the	O
SPECS	B-Algorithm
system	O
for	O
single-lane	O
use	O
only	O
.	O
</s>
