See which of Ann Arbor’s 144 miles of sidewalk gaps will get filled first Updated Jan 12, 2021; Posted Jan 12, 2021 A screenshot of Ann Arbor's sidewalk gap prioritization dashboard unveiled at a City Council work session Jan. 11, 2021.City of Ann Arbor Facebook Share ANN ARBOR, MI — With a new tax to fill gaps in the city sidewalk network, Ann Arbor officials are moving forward on prioritizing which ones to address first. City Engineer Nick Hutchinson presented City Council with a new online dashboard Monday night, Jan. 11, including an interactive map of all 144 miles of sidewalk gaps in the city, ranked by priority from highest to lowest.