During the entire winter season (and on many days during spring / summer), the entrance to 15th street, from Empire Avenue (where the pin is placed) is closed off physically and does not allow traffic through — having routing directions never take car this way would be optimal… as there are many other open paths to reach 15th Street that do not rely on this entrance point. This is especially important for full self driving vehicles that may try to “drive through” this barrier and not realize it’s blocked off. Thank you !