4th and William Parking Structure 2016 Will Be Busy Year For Ann Arbor's Downtown Development Authority By Jorge Avellan • Jan 4, 2016 Ann Arbor Downtown Development Authority / a2dda.org Ann Arbor's Downtown Development Authority (DDA) has started focusing on what it can do to improve the city in 2016. Listen Listening... / 0:28 WEMU's Jorge Avellan reports on the Ann Arbor Downtown Development Authority's agenda for 2016. Ann Arbor Parking Structure To Get Upgrades And Temporary Bus Station By Andrew Cluley • May 8, 2014 WEMU One of Ann Arbor's oldest parking structures is getting a $5 million update. The Downtown Development Authority has approved an improvement plan for the building at Fourth and William. Listen Listening... / WEMU's Andrew Cluley reports on changes coming to Ann Arbor's 4th and William parking structure.