'.Please help me unscramble this.

When the author asks himself a series of questions, it conveys the way he thinks and where he stands.at least that's what i believe.

The sentence needs a descriptor of exactly "what" will happen at gurley and marina. in this case, it is the light at the intersection turning green. in this case, the sentence could be rewritten as "the light at the intersection of gurley and montezuma will turn green exactly three seconds after the light at the intersection of gurley and marina."