<s>
HADECS	B-Algorithm
or	O
Highways	O
Agency	O
Digital	O
Enforcement	O
Camera	O
System	O
is	O
a	O
type	O
of	O
speed	B-General_Concept
camera	I-General_Concept
on	O
roads	O
in	O
England	O
,	O
operated	O
by	O
Highways	O
England	O
.	O
</s>
<s>
The	O
HADECS	B-Algorithm
camera	O
was	O
introduced	O
in	O
2012	O
.	O
</s>
<s>
HADECS	B-Algorithm
cameras	O
have	O
been	O
introduced	O
to	O
enforce	O
variable	O
speed	B-Application
limits	I-Application
(	O
VSLs	O
)	O
as	O
found	O
commonly	O
on	O
managed	O
motorways	O
-	O
hard	O
shoulder	O
running	O
in	O
peak	O
traffic	O
flows	O
.	O
</s>
<s>
Hadecs	B-Algorithm
3	O
was	O
introduced	O
on	O
the	O
M25	O
in	O
Kent	O
in	O
April	O
2014	O
,	O
becoming	O
active	O
on	O
22	O
October	O
2014	O
.	O
</s>
<s>
Two	O
manufacturers	O
currently	O
hold	O
HOTA	B-Algorithm
to	O
supply	O
equipment	O
for	O
the	O
HADECS	B-Algorithm
3	O
system	O
,	O
those	O
being	O
Redflex	O
Holdings	O
and	O
Dynniq	O
.	O
</s>
