Yes, speed cameras got advance sign board notice, unless those
ad hoc operation when there is a need.
Once a TP told me, speed cameras is not mend to catch speeding
only, the most important is to warn drivers to slow down as there
is some danger ahead, if they really wants to catch speeding, there
are many to catch thru their other cameras on the road. The key is
therefore, preventive and not penalty.
