Two local datasets have recently come online for easy public access:
The City of Ann Arbor now has a searchable archive of City Council Minutes, dating back to 1990. The search page appears to have replaced the chronological list of links to the minutes.
The Washtenaw Area Transportation Study now has a searchable database of traffic counts for Washtenaw County. The database provides the most recent traffic volumes available for individual intersections, along a specified street, or for an entire municipality.