Street Renewal Definitions

When it's done:

• All street classifications (regional, collector, industrial, residential, alleys) and surface types
• Pavement structure is in very poor (failed) condition

What's done:

• The entire pavement structure, including curbs, is replaced:
• Typically includes renewal of all sidewalks, private approaches and full boulevard restoration
• The new surface can be either concrete or asphalt depending on soil subgrade conditions, traffic volumes, frequency of heavy vehicles, etc.
• Requires the most coordination with other stakeholders (e.g. Water & Waste Department, utilities and rail authorities) and construction time.

There are four typical types of rehabilitations which can require extensive staging and coordination with other stakeholders.  The type of treatment is dependant on the pavement surface (concrete, asphalt or composite) and the street classification:

Major Rehabilitation

When it's done:

• Regional, collector, industrial and residential streets
• Concrete and composite (asphalt over concrete) surfaces
• Pavement structure is in fair to poor condition

What's done:

• Extensive concrete repairs (25% to 40%) and asphalt surfacing/resurfacing to restore drainage and ride:
• Can involve extensive curb renewal depending on the extent of concrete repairs, condition and drainage requirements
• Includes renewal of sidewalks in poor condition or requiring improvements for those with restricted mobility
• Minimal work on private approaches, overlaying with asphalt where possible and renewing where required for drainage
• Minimal boulevard restoration as required by sidewalk and/or pavement repairs
• Requires extensive staging of works and may include coordination with other stakeholders

Minor Rehabilitation

When it’s done:

• Regional, collector, industrial and residential streets
• Concrete surfaces
• Pavement structure is in fair condition

What’s done:

• Minor concrete repairs (10% or less) and asphalt surfacing to restore drainage and ride:
• Curb renewal limited to condition and drainage
• Includes renewal of sidewalks in poor condition or requiring improvements for those with restricted mobility
• Minimal work on private approaches, overlaying with asphalt where possible and renewing where required for drainage
• Minimal boulevard restoration as required by sidewalk and/or pavement repairs
• Requires minor staging of works and limited coordination with other stakeholders

Asphalt Rehabilitation

When it’s done:

• All street classifications (regional, collector, industrial, residential, alleys)
• Asphalt surfaces
• Pavement structure is in fair to poor condition

What’s done:

• Base work (20% to 30%) and asphalt resurfacing to restore drainage and ride:
• Can involve extensive curb repair depending on the extent of base work, condition and drainage requirements
• Includes renewal of sidewalks in poor condition or requiring improvements for those with restricted mobility
• Minimal work on private approaches, overlaying with asphalt where possible and renewing where required for drainage
• Minimal boulevard restoration as required by sidewalk and/or pavement repairs

• Requires extensive staging of works and may include coordination with other stakeholders

Resurfacing

When it's done:

• Regional, collector, industrial, and residential streets
• Composite (asphalt over concrete) surfaces
• Pavement structure is in poor condition

What's done:

• Asphalt resurfacing to restore drainage and ride
• Requires minor staging of works and coordination with other stakeholders is not expected

Pavement preservation generally involves minor staging and coordination with other stakeholders.  There are generally five types of pavement preservation depending on the surface (concrete, asphalt or composite) and the street condition:

Thin Bituminous Overlay (TBO)

When it's done:

• Regional, collector, industrial and residential streets
• Concrete surfaces
• Pavement structure is in good to fair condition

What's done:

• Very minor concrete repairs (less than 5%) and an asphalt overlay to restore drainage and ride:
  • Curb renewal limited to drainage and condition
  • Only safety (e.g. tripping hazards) repairs to sidewalks
  • Minimal private approach work to permit drainage
• Requires minor staging of works and coordination with other stakeholders is not expected

Asphalt Resurfacing

When it’s done:

• All street classifications (regional, collector, industrial, residential, alleys)
• Asphalt surfaces
• Pavement structure is in good to fair condition

What’s done:

• Minor base work (less than 10%) and asphalt resurfacing to restore drainage and ride:
• Curb renewal limited to drainage and condition
• Only safety (e.g. tripping hazards) repairs to sidewalks
• Minimal work on private approaches, overlaying with asphalt where possible and renewing where required for drainage
• Minimal boulevard restoration as required by sidewalk and/or pavement repairs
• Requires minor staging of works and coordination with other stakeholders is not expected

Mill & fill

When it's done:

• Regional streets only
• Composite (asphalt over concrete) surfaces
• Pavement structure is in fair condition

What's done:

• Minimal concrete repairs (less than 10%) and new asphalt surface to restore drainage and ride:
  • Curb renewal limited to drainage and condition
  • Only includes renewal of sidewalks in poor condition or requiring improvements for those with restricted mobility
  • Minimal work on private approaches, overlaying with asphalt where possible and renewing where required for drainage
• Requires minor staging of works and limited coordination with other stakeholders

Partial Depth Patching

When it's done:

• Applicable to all street classifications (regional, collector, industrial, residential, alleys)
• Concrete surfaces
• Pavement structure is in good condition

What's done:

• Shallow joint repairs where minor surface spalling is observed to prevent further deterioration
• Frequently completed in conjunction with Diamond Grinding depending on street classification
• Coordination with other stakeholders is not expected but staging and construction time can be significant

Diamond Grinding

When it’s done:

• Regional streets
• Concrete surfaces
• Pavement structure in good condition

What’s done:

• Removing a thin layer of the concrete surface to restore drainage and ride and improve skid resistance and safety
• Frequently completed in conjunction with other preservation techniques (e.g. Partial Depth Patching)
• Requires minor staging of works and coordination with other stakeholders is not expected

When it's done:

• Can be a stand-alone project, or associated with reconstructions, major rehabilitations or asphalt rehabilitations
• Examples:
  • New transportation infrastructure: roads, bridges, sidewalks, paths
  • Addition of pathways, sidewalks, or bike boulevards to an existing roadway
  • Traffic flow improvements – addition of turning lanes, acceleration lanes at an intersection, or realignment of travel lanes
  • New traffic signals
  • Roadway widenings

What's done:

• The addition is new construction, or removal and replacement with revised alignment
• Often additional coordination is required with respect to:
  • minor property acquisitions or easements
  • relocation of surface infrastructure such as street lights, telecommunications boxes, fire hydrants, etc
  • relocation of pavement infrastructure such as manholes and catchbasin inlets
  • relocation of underground infrastructure such as water and sewer pipes and services, power cables and gas lines
• These additional requirements can take considerable time (up to two years for property requirements) to resolve prior to beginning construction