Annual Street Preventative Maintenance

Ann Arbor’s Annual Street Preventative Maintenance Program, which is planned through the Capital Improvements Plan, uses different forms of pavement preservation treatments to improve the surface quality of streets and help slow further deterioration of existing asphalt. Pavement preservation treatments are cost affective when applied at the right time on roads in decent condition to continue to keep them that way. 

Cape Seals are environmentally friendly due to low energy requirements and emits no pollutants.

This program is funded by one or both of the following sources: ACT 51, which is money collected from taxes on gasoline, or from the city’s Street, Bridge, and Sidewalk Millage.

The city maintains a road conditions and improvements dashboard of all the projects now underway and planned for the future. 

Prior to Construction

  • City staff and/or consultants will drive the area assessing road conditions.
  • City staff and/or consultants will start marking areas with pink spray-paint where patches will be preformed.

 

During Construction

  • Patching will start and consist of milling small sections of bad pavement two inches deep and replace with new asphalt.
  • Road will be prepped for the preservation treatment by installing "No-Parking" signs, removing existing pavement markings, and street sweeping.  
  • Preservation treatments will be applied in two phases.
    • First, chip seal will be applied to the existing asphalt which takes about 1-2 hours. Road reopened once placement is done. 
      • Street sweeping will occur between treatments.
    • Second, micro-surfacing will be applied over the chip seal which takes about 2-3 hours, temperature dependent. Road reopened once completed and material has set.
  • Pavement markings re-applied. 
  • Project area clean up and street sweeping. 

 

Construction Impacts

  • Loose stone is normal and it is recommended to drive slow to not damage the pavement.
  • Mail delivery will be maintained. 
  • Trash, Recycling, and Compost binds are required to be clearly marked with your address and placed in the lawn extension (not in the road) the night before your scheduled collection day to accommodate construction. 
  • Vehicle access will be periodically delayed during construction. If your vehicle is needed park legally, on an adjacent street, outside of the construction area during working hours. 
  • Door notices will be provided in advance of chip seal and micro-surfacing operations. 

Preventative treatments are applied to asphalt roads in fairly good condition and over the existing asphalt. 

Cape Seal

Two-step process consisting of Chip Sealing followed by Micro-Surfacing (does not happen on the same day).

Step 1: Chip seal consists of applying a thin layer of liquid asphalt over existing pavement to fill the cracks and voids followed by a layer of aggregate (chips). A rubber-tired roller is used to compact and embed the chips into the liquid asphalt. Process typically takes 1-2 hours.

Step 2: Micro-Surfacing typically happens 1 to 14 days after the chip seal has been applied and consists of applying one to two courses of a cold mixture of asphalt, fine aggregates, cement, water and other additives over the chip seal or existing asphalt. Typical thickness is 3/8 to 1/2 inch. Process typically takes 2-3 hours, temperature dependent. 

Crack Seal

Consists of filling and sealing existing cracks typically in asphalt pavement with hot-rubberized asphalt. 

Project Areas

All work is anticipated and subjected to change due to weather or conflicts. Updates will be posted as soon as possible. 

Anticipated Pavement Preservation Streets are shown in yellow on the Active Road and Utility Projects Dashboard.

Geddes Road (Earhart to US-23) anticipated schedule: 

  • Pavement marking application - Week of August 11th 

Huron Parkway (Plymouth to Hubbard) anticipated schedule: 

  • Pavement marking application - Week of August 11th

Schedule is subjected to change due to weather or conflicts.

Streets:

  • Hazelwood Avenue (Dolph to Sunnywood) 
  • Hilltop Drive (Gralake to 3125 Hilltop)
  • Parklake Avenue (Lakewood to Lakeview)
  • Sunnywood Drive (Dolph to Lakewood)

Anticipated schedule: 

  • Micro-surfacing - Hilltop will be completed August 11th. 
    • Impacts: Street closed to vehicles during active construction (process typically takes 2-3 hours per street, temperature dependent). Road reopened to traffic same day.    
  • Pavement marking application - TBD. Anticipated to be rescheduled to the week of August 11. 
    • Impacts: Creates vehicle delays but road remains open to traffic.

Schedule is subjected to change due to weather or conflicts. Schedule will be updated as soon as a new date is determined and staff's availability. 

Streets:

  • Bedford Road (Londonderry to Sheridan)
  • Belmont Road (Melrose to Londonderry)
  • Berkshire Road (Vinewood to Hill)
  • Cherokee Road (Baldwin to Ferdon)
  • Dorset Road (Onondaga to Berkshire)
  • Fair Oaks Parkway (Norway to Washtenaw)
  • Glendaloch Circle (Glendaloch to end)
  • Heatherway Street (Glendaloch to Arlington)
  • Lincoln Avenue (Wells to Cambridge)
  • Linden Street (S. University to Geddes)
  • Onondaga Street (Dorset to Geddes)
  • Radcliffe Avenue (Hampshire to Towner)
  • Revere Court (Lookout to end)
  • Ruthven Place (Hill to end)
  • N. Thayer Street (Huron to Ann)
  • Wayne Street (Washtenaw to Vinewood)

Anticipated schedule: 

  • Pavement marking application - Week of August 11
    • Impacts: Creates vehicle delays but road remains open to traffic.

Schedule is subjected to change due to weather or conflicts. Schedule will be updated as soon as a new date is determined and staff's availability. 

Streets:

  • Bardstown Trail (Glazier to Charter)
  • Penberton Drive (Waldenwood to Waldenwood) + various courts
  • Waldenwood Drive (Earhart to Earhart) + various courts
  • Wellington Cross Road (Waldenwood to end)

Anticipated schedule: 

Micro-surfacing - Will resume construction August 11th. Anticipated to be completed August 12th.

    • Impacts: Street closed to vehicles during active construction (process typically takes 2-3 hours per street, temperature dependent). Road reopened to traffic same day.   
  • Pavement marking application - Week of August 11
    • Impacts: Creates vehicle delays but road remains open to traffic.

Schedule is subjected to change due to weather or conflicts. Schedule will be updated as soon as a new date is determined and staff's availability. 

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