Fast cars filing chaotically at intersection lights (7,7)

I believe the answer is:

traffic signals

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'intersection lights' is the definition.
'traffic signals' can be an answer for 'lights' (traffic signal is a kind of light). I'm not certain of the 'intersection' bit.

'fast cars filing chaotically' is the wordplay.
'chaotically' is an anagram indicator.
'fast'+'cars'+'filing'='fastcarsfiling'
'fastcarsfiling' anagrammed gives 'TRAFFIC SIGNALS'.

'at' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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