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When controlling a two-way road, each camera should be
installed on the side which it will film to avoid excessive
lateral angle and to avoid concealment of cars driving one
way by cars driving the other way.
If, for public works constraints, it isn't possible to put a
camera on each side of the road, the camera which films the
opposite side of the road should be equipped with a large
lens in order to film with the larges possible frame, thus
reducing the lateral angle.
When filming in a bend, cameras should be placed on the
outside of the bend so as to reduce the lateral angle.
Putting the cameras on the outside of the bend is particularly
important on a two-way road and when public works
constraints mean that the cameras cannot be placed on both
sides of the road.
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