You can change categories if there is a constant source of updates in the form of speedcam.txt. If we manage to support the category with updates from the speedcam database. The level of interest of other persons in updating information is also of no small importance. And so you decided to create a new category, the main question is which category can be removed from the existing ones. The main thing to remember about default speedcams is 1-15, it is better not to touch them at all, otherwise you will not be able to use other radar bases.
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Exceptions to this table may be 10, 13, 14
If you change a picture, then you need to design it in the general style, an example of how this should not be done, here are icons from different sources with different initial sizes:
Spoiler: +
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