Thick, rotating bars and barriers (10)

I believe the answer is:

roadblocks

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'barriers' is the definition.
('roadblock' can be a synonym of 'barrier')

'thick rotating bars' is the wordplay.
'thick rotating' becomes 'road' (I can't explain this - if you can you should believe this answer much more).
'bars' becomes 'blocks' ('block' can be a synonym of 'bar').
'road'+'blocks'='ROADBLOCKS'

'and' is the link.

Can you help me to learn more?

I've seen this clue in The Hindu.

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