Examples
Noise barrier on a highway bridge, equipped with standard stripes (2cm/10cm) applied already during production. The stripes should have a certain degree of contrast under different light conditions.
effectiveness
practicability
longevity
costs
visiblity for humans
Similiar prevention measure as above, using a ribbon of the colour "crystal". It is not so easy to stick them on in a very exact pattern and depending on the prodcut the longevity of such stripes rather reduced.
effectiveness
practicability
longevity
costs
visiblity for humans
These stripes have a with of only 1cm; the distance between them is 5cm. The effectiveness is similiar with the measures shown above. However, the aspect is a bit lighter.
effectiveness
practicability
longevity
costs
visiblity for humans
Horizontal stripes on a noise barrier in a residental area in Vienna. The high desity of stripes, covering up to 50% of the glass panes, provide of course an optimal protection. However, this glass type still may reflect - depending on the angle - parts of the surroundings (as can be seen on the second photograph).
effectiveness
practicability
longevity
costs
visiblity for humans
Problems: reflection
Wind shelter in a football stadium. After a series of collisions these panes were equipped with dark stripes which had a good success. The mounting itself was rather difficult.
effectiveness
practicability
longevity
costs
visiblity for humans
Problems: mounting afterwards
Important: Vegetation attracts birds and thus multiplies the collision rates along transparent barriers! Either you want an undisturbed view, using a transparent wall. Then you should cut down all bushes and trees. Or you want the wall camouflaged with vegetation - but then the wall needn't be transparent! 
