Melting tarmac starts to restrict some vehicles (8)

I believe the answer is:

tramcars

'vehicles' is the definition.
(tramcar is a kind of vehicle)

'melting tarmac starts to restrict some' is the wordplay.
'melting' indicates an anagram.
'starts to' suggests taking the first letters.
The initial letters of 'restrict some' is 'rs'.
'tarmac' is an anagram of 'tramca'.
'tramca'+'rs'='TRAMCARS'

(Another definition for tramcars that I've seen is " public transport".)

I've seen this clue in The Times.

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