Is usage of 'it' ambiguous ?

Question

Building wide roads  can solve traffic congestion , which is a serious problem in most of the major cities during  rush hour  , because  it  allows traffic to move more easily.

Is usage of IT ambiguous?
It refers to both building wide roads and rush hour.

As both sentences before and after because are independent , it refers to the subject of first sentence. 
Please tell me if this is the concept.

Staphyk · Answer

Hello can  rush hour  allow traffic to move more easily ??? (Doesn’t make sense)
“IT” clearly refers wide roads. 
Focus on meaning rather than technicalities

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madgmat2019 · Answer

Here it's not ambiguous because only ' building wide roads fits in correctly interms of meaning

It will be ambiguous only when more than one subject is referred by the pronoun in terms of meaning too

EducationAisle · Answer

Hi  Arth257 , you forgot one more eligible antecedent of  it :  serious problem .

So, technically  it  is an  ambiguous  pronoun, since it has  multiple  eligible antecedents.

However, the above sentence will still be considered fine from a pronouns perspective, because pronoun-ambiguity should generally  not  be a reason to eliminate an answer choice.

davisz2010 · Answer

Hi Arth,
I believe that is the concept. With two independent clauses that have the same structure, the subject is the same.

Is usage of 'it' ambiguous ?

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