With or without on?

Both choices are incorrect without "on" ("sparkle" can hardly be transitive, and it is people that are dazzled, not inanimate things).

"sparkled on the concrete road" sounds OK to me. Strictly speaking, "dazzled on the concrete road" does not sound completely logical to me, but I would accept in in creative writing.

GPY could you please give an example sentence where those words are used in the same context as in my sentence. I am a little confused.

In the case of "sparkle", "The concrete road sparkled in the sunlight" is perhaps a more usual way of putting it.

For "dazzle", you could say "The sunlight on the concrete road was dazzling" or "I was dazzled by the sunlight on the concrete road".

Concrete roads, because of their physical nature, are not the most obvious things to sparkle, but you are not prevented from saying it

Am I to understand that it's best not to use these as transitive verbs?
Sunlight sparkled the road would sound awkward because it's not a transitive verb?

Also, one of the meanings of dazzle as an intransitive verb is 'to shine brightly' so would it be incorrect to say, 'sunlight dazzled on the road"?

Haddie Am I to understand that it's best not to use these as transitive verbs?Sunlight sparkled the road would sound awkward because it's not a transitive verb?

As I mentioned, "sparkle" can hardly be transitive. That is to say, in ordinary English it is almost never transitive. In creative or poetic language it is not completely impossible for it to be used t

Thank you for all your help GPY.