Is the narrator's voice close to the poet's or is it the voice of a fictional or historical person in The Road Not Taken?
Let's look at who the poet was:
Robert Frost: Originally born in England, Robert Frost emigrated to America when he was about 10 years old. Frost's poetry, despite his British roots, is considered quintessentially American by nature. In fact, his poetry is considered quite unique by many critics, who identify him as standing "at the crossroads of 19th-century American poetry and modernism" (Poetry Foundation). Interestingly, although Frost continued to use many of the tools of 19th century poetry, such as meter, line-length, and rhyme scheme, his adherence to the rules of 19th-century poetry was entirely haphazard, based on how he felt the poem needed to sound. Unlike many of his contemporaries, he did not totally abandon all of the structural and stylistic elements of his forebears, preferring instead to carefully mix them to create a feel that emulated the speech of native New Englanders.
Looking at the poet's life and experiences, one can certainly see that Frost often found himself at a crossroads and chose his own path - not out of resentment for those taking the more commonly used path, but out of artistic interest and curiosity.