Transport used on street, most reliable (8)

I believe the answer is:

soundest

'most reliable' is the definition.
(sound can mean reliable or secure)

'transport used on street' is the wordplay.
'transport' indicates an anagram (each letter must be moved or 'transported').
'street' becomes 'st'.
'used'+'on'='usedon'
'usedon' with letters rearranged gives 'sounde'.
'sounde'+'st'='SOUNDEST'

I've seen this clue in The Guardian.

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