What's the adjective for traffic? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs traffic and traffick which may be used as adjectives within certain contexts.
trafficky
(informal) Characterised by traffic; having the noise and commotion of motor vehicles.
“Without my saying anything, she pointed to the trafficky entrance to the kitchen.”
“He crosses the canal on an iron footbridge, walks along a trafficky road, negotiates a roundabout, passes down some dingy back streets, and arrives at the Apple Tree.”
“Figure out the best and least trafficky route to my new job.”