Complex sentence: The downtown street grid is oriented about 30 ° off of true north, and as this orientation ends and avenues turn to run north-south, streets are suffixed east and west, defined by their relationship to Nicollet Avenue.
Split into simpler sentences: The downtown street grid is oriented about 30 ° off of true north. As the downtown street orientation ends and avenues turn to run north-south, streets are suffixed east and west, defined by their relationship to Nicollet Avenue.