xkcd

It's an adaptation from "the road not taken", by Robert Frost, which does the same

Two roads diverged in a yellow wood,
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could
To where it bent in the undergrowth;

There’s already an “I” earlier in that sentence, so it’s not necessary necessary, especially in poetry, but it would absolutely be clearer with another.