What is the grammatical function of widely across road?

The phrase "widely across the road" is not grammatically correct. It seems like there's a missing word or two.

Here's why it doesn't work:

* "Widely" is an adverb, and adverbs usually modify verbs, adjectives, or other adverbs. It doesn't make sense to modify "across the road" directly.

* "Across the road" is a prepositional phrase that describes location.

To make it grammatical, you could modify the verb or adjective related to the movement across the road:

Examples:

* "The car traveled widely across the road." (Here, "widely" modifies the verb "traveled")

* "The road was widely used for travel." (Here, "widely" modifies the adjective "used")

Without knowing the context, it's hard to know exactly what the intended meaning is. Please provide more information about the sentence so I can give you a more accurate answer.