As a side note, roaming around the streets virgil will give you signs and tell you when there is an audio log near by. Examples of this are car alarms, a police cars siren going off, those road blocks going up and down and signs saying "Detour" or "Keep right". Follow these hints and you will find all the logs. Also, be careful with the guy helping you find number 30, because he can die before you get to the sealed off area.