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We've cut the number of cars on the road/roads by half, but the sky is still hazy.

1. Is the above correct?
2. Which choice is correct?
Thanks.
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New2grammarWe've cut the number of cars on the road/roads by half, but the sky is still hazy.
I'm inclined to say "road" but I think a case could be made for either formulation.
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Both are correct. on the road is the more abstract idea, roughly equivalent to operating or travelling or in use.

CJ