Bus drivers find them arresting (5)

I believe the answer is:

stops

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'bus drivers' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps there's an association between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for stops that I've seen before include "Prevents" , "Posts (anag.)" , "Checks" , "Discontinues" , "Ceases" .)

I've seen this clue in the Evening Standard.

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