vehicular traffic vs vehicle traffic

vehicular traffic and vehicle traffic both are nouns.

Word	Noun	Adjective	Verb	Adverb
vehicular traffic	Yes	No	No	No
vehicle traffic	Yes	No	No	No

As nouns, vehicular traffic and vehicle traffic are synonyms defined as:

vehicular traffic and vehicle traffic: the aggregation of vehicles coming and going in a particular locality

vehicular traffic (noun)	vehicle traffic (noun)
the aggregation of vehicles coming and going in a particular locality	the aggregation of vehicles coming and going in a particular locality