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Dundas BRT

Dundas BRT - Mississauga East

Existing Environmental Conditions – Key Findings

The following key findings outlined in the slides below have been determined based on environmental existing conditions studies conducted to-date. These findings will be used to help inform the development of the preferred design and the completion of the environmental impact assessment.  

Separate TPAPs will be completed for the following study areas:  

Toronto

Toronto 

Kipling Transit Hub to Etobicoke Creek   

Mississauga East

Mississauga East  

Etobicoke Creek to Confederation Parkway

Mississauga West

Mississauga West  

Confederation Parkway to Ninth Line

Existing Environmental Conditions – Mississauga East

Air Quality

  • Background air quality levels are predominately below respective provincial and federal ambient air quality criteria and standards; however, some levels show existing exceedances, including:
    • Benzo(a)pyrene;
    • Benzene; and
    • Nitrogen dioxide.
  • Contaminants showing higher levels of background concentration above 80% of the federal standards include nitrogen dioxide and fine particulate matter (PM2.5).
  • Meteorological data from the Toronto Pearson Airport over a five-year period (2016 – 2020) shows predominant wind direction blowing from northwest, west and southwest, and low-speed wind predominance from the southeast.

Natural Environment

  • The study area includes a variety of urban, residential and industrial areas which are divided by several natural features including watercourses, riparian areas and vegetated corridors.
  • Several watercourses cross the study area and provide habitat to a variety of fish species including Sawmill Creek, Glen Erin Brook (coolwater systems) and Etobicoke Creek, Little Etobicoke Creek and Cooksville Creek (warmwater systems).
  • A wide variety of migratory birds nest within the study area and Cliff Swallows, Barn Swallows, Eastern Phoebe and American Robin were identified under the Etobicoke Creek bridge.
  • Species at Risk are known to occur within the study area including: Barn Swallow, Chimney Swift and Snapping Turtle.
  • Local wildlife corridors exist in several areas, primarily associated with watercourse, riparian areas and valley lands for small, medium and large mammals as well as turtles.

Archaeology

  • Three registered archaeological sites were identified within one km of the current project area boundaries.
  • A visual inspection to confirm areas of archaeological potential versus areas of urban disturbance found that the project area consists primarily of residential and commercial development along the Dundas Street East corridor, roadways and highways (e.g., Confederation Parkway, Hurontario Street and Dixie Road), with some areas of manicured lawn and park land.
  • Results of the Stage 1 background research and field review, including mapping and determination of archaeological potential, will be summarized in the Stage 1 archaeological assessment report.

 

View of Etobicoke Creek looking downstream (south) from the bridge structure. A riffle exists downstream of the structure.View of Etobicoke Creek looking downstream (south) from the bridge structure. A riffle exists downstream of the structure.
Source: AECOM, 2021

Conditions around Little Etobicoke Creek, banks heavily sloped and reinforced to prevent erosion, facing south.Conditions around Little Etobicoke Creek, banks heavily sloped and reinforced to prevent erosion, facing south.
Source: AECOM, 2021

 

Climate Change & Sustainability

  • A Greenhouse Gas Inventory is being developed that incorporates the emissions during construction and operations and will include any changes as a result of the Dundas BRT.
  • Dundas Street is subjected to riverine flooding, which will be included in the Risk Assessment. In Mississauga East, the major area of riverine flooding is at Etobicoke Creek.
  • The application of Metrolinx’s broader sustainability initiatives currently underway will be included in the design, construction and operation of the Dundas BRT with the goal of improving environmental and social outcomes. In addition, recommendations will be made to reduce greenhouse gas emissions along the corridor.

Noise & Vibration

  • The Mississauga East segment is generally a mix between commercial and residential uses in a busy urban environment.
  • Dundas Street is considered an arterial roadway which is intersected by other arterials (e.g., Dixie Road) and minor residential or commercial access roads.
  • The ambient sound levels at the most impacted noise sensitive locations (e.g., dwellings) are dominated by a combination of existing Dundas Street and the intersecting roads.
  • Existing GO rail intersecting Dundas Street near Cawthra contributes to the existing ambient sound levels at sensitive locations.
  • Currently, no known existing vibration concerns due to road traffic. However, heritage buildings have been identified in close proximity to Dundas Street.

Socio-Economic & Land Use

  • Mississauga East is consistent with provincial and municipal plans and policies as it is anticipated to enhance public transit connections to various communities and support economic development objectives.
  • Land uses on Dundas Street in Mississauga East consist of low-rise and mid-rise commercial and residential uses, with low-rise residential and commercial behind.
  • The demographic profile within the study area ranges, with some communities being relatively consistent with the Mississauga city-wide average where others differ.
  • A range of community amenities (including institutional and recreational uses, and community resources) are present within the study area. Many of the community resources are clustered around Downtown Cooksville.
  • A number of development applications for various land use types are either in progress or recently approved within the study area.

Commercial development in Mississauga, looking south on Dundas Street East.Commercial development in Mississauga, looking south on Dundas Street East.
Source: AECOM, 2021

Traffic & Transportation

  • Within the Mississauga East corridor, Dundas Street varies between six-lane and four-lane cross-sections, and in many locations a centre two-way left-turn lane is present. A curbside high occupancy vehicle traffic lane is provided between Dixie Road and the Etobicoke Creek.
  • Continuous sidewalks are provided on both sides of Dundas Street within Mississauga East, with no dedicated cycling facilities provided.
  • Generally heavier volumes during the afternoon peak hours as compared to those in the morning peak hours. The largest directional traffic volumes along Dundas Street are 1,800 vehicles in the morning peak hour and 2,200 vehicles in the afternoon peak hour.
  • Most intersections operate at acceptable levels of service in both the morning and afternoon peak hours.
  • However, in both the morning and afternoon peak hours, congestion occurs in Cooksville near the Hurontario Street intersection. Other intersections with major arterial roadways, like at Dixie Road, operate with poor levels of service in the peak hours.

Cultural Heritage

  • Seventeen built heritage resources and cultural heritage landscapes have been identified within the project area boundaries.
  • A preliminary impact assessment will be completed to identify impacts of the project on the built heritage resources and cultural heritage landscapes.
  • Mitigation measures and monitoring activities will be developed in the Cultural Heritage Report: Existing Conditions and Preliminary Impact Assessment.

 

Vehicular traffic travelling westbound on Dundas Street at the Dixie Road intersection in Mississauga.Vehicular traffic travelling westbound on Dundas Street at the Dixie Road intersection in Mississauga.
Source: AECOM, 2021

Commercial development in Downtown Cooksville, looking west on Dundas Street East from Camilla Road.Commercial development in Downtown Cooksville, looking west on Dundas Street East from Camilla Road.
Source: AECOM, 2021

Would you like to share any insights or concerns regarding these environmental studies?

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Pinch Points

The Dundas BRT - Pinch Points - Cooksville Area

As work for Mississauga East is advancing ahead of other areas along the Dundas BRT corridor, an additional evaluation process has been applied to the Cooksville pinch point to meet the requirements of the Investing In Canada Infrastructure Program (ICIP).

Mississauga East: key pinch point considerations

Key considerations for the Cooksville pinch point include:  

  • Existing narrow right-of-way (ROW) in many locations  
  • Property acquisition required to achieve the Official Plan ROW to accommodate all contemplated infrastructure needs (dedicated BRT guideway, four general purpose lanes, cycle tracks, sidewalks and amenity/utility space)  
  • Some buildings located close to the property/ ROW line  
  • Significant development intensification  
  • Hurontario LRT track and station stop  
  • Minimal natural heritage features  
  • Some cultural heritage resources  
  • Each design alternative has a varying impact on the community character of Cooksville Village, protecting or enhancing this area is a priority

During round 1 engagement, members of the public identified:

Opportunities to:

  • Implement the Dundas BRT Project as part of the City of Mississauga’s Dundas Connects Master Plan  
  • Implement a station stop to connect to the Hurontario LRT line  

Concerns about:  

  • Cycling infrastructure and safety  
  • Pedestrian infrastructure and safety  
  • Widening Dundas Street with additional lanes  
  • Landscaping (aesthetics)  

 

Best performing alternative: Dundas Street in Mississauga – Cooksville pinch point

The evaluation of the short-list determined Alternative 1 – a full median BRT about centreline is currently the best performing alternative. Alternative 1 proved to be the best performing in terms of geometrics/infrastructure, mobility, traffic and property considerations. It would also provide a BRT station at Hurontario with limited to no impacts to the future Hurontario LRT line and would allow for optimal BRT operations and reliability.

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Rendering: Typical bird’s eye view of Alternative 1 - Full median BRT widened about centreline.

Short list of alternatives: Dundas Street in Mississauga – Cooksville pinch point 

Alternative 1: Full median BRT widened about the centreline (with two general purpose lanes in either direction). *

Alternative 3 – Full median BRT with no lefts at the Dundas and Hurontario intersection.  **

Alternative 4: Curbside buses in mixed traffic. **

*This icon indicates best performing alternative  

**This icon indicates a short-listed alternative

Long list of alternatives: Dundas Street in Mississauga – Cooksville pinch point 

The following six alternatives were reviewed for potential benefits and drawbacks: 

Alternative 1: Full median BRT widened about centreline (with two general purpose lanes (GPL) in either direction) 

Benefits:

  • BRT operations and reliability  
  • Maintains continuity of median BRT and active transportation  
  • Provides acceptable auto travel times when compared to other alternatives  
  • Maintains BRT station at Hurontario with limited/no impacts to the Hurontario LRT  
  • Operates at capacity with acceptable auto travel times  
  • Will improve the overall community character of Cooksville Village through transit oriented development that a BRT will bring to the area  

Drawbacks:

  • Potential for heritage property and other property impacts and displacements  
  • Moderate capital cost to implement and purchase of properties 

 

Alternative 2:  Full median BRT (with one GPL in either direction) 

Benefits:

  • BRT operations and reliability  
  • Maintains continuity of median BRT and active transportation  
  • Potential to avoid displacing two heritage buildings with localized narrowing of the sidewalk and cycle track  
  • Minor potential impacts to existing and future land uses  
  • Will improve the overall community character of Cooksville Village through transit oriented development that a BRT will bring to the area  

Drawbacks:

  • Existing traffic operations fail through Cooksville. Queue lengths extend to Mavis and Cawthra  
  • Potential for one heritage structure and other property displacements  

Alternative 3: Full median BRT with no lefts at Hurontario 

Benefits:

  • BRT operations and reliability  
  • Maintains continuity of median BRT and active transportation  
  • Maintains BRT station at Hurontario with limited/ no impacts to the Hurontario LRT  
  • Will improve the overall community character of Cooksville Village through transit oriented development that a BRT will bring to the area  

 

Drawbacks:

  • Potential for heritage property and other property impacts and displacements  
  • Results in auto travel delays for westbound thru traffic, including increase queue lengths at Confederation Parkway

Alternative 4: Curbside buses in mixed traffic 

Benefits:

  • Maintains continuity of active transportation  
  • Avoids property impacts through Cooksville if active transportation is deferred to a later date  
  • Easiest and lowest cost to implement, compared to other alternatives  
  • Limited impacts to existing heritage properties and planned development  

Drawbacks:

  • Does not provide BRT continuity or active transportation (if active transportation is implemented later)  
  • Results in a two-minute reduction in BRT service through the area  
  • No continuity and less reliable than other alternatives  
  • Does not improve the overall community character of Cooksville Village through transit oriented development as no new transit infrastructure changes will be made to the area (beyond the Hurontario LRT)  

Alternative 5: Full median BRT with widening to the South 

Benefits:

  • BRT operations and reliability  
  • Maintains continuity of BRT and active transportation  
  • Operates at capacity with acceptable auto travel times  
  • Will improve the overall community character of Cooksville Village through transit oriented development that a BRT will bring to the area  

Drawbacks:

  • Extremely high capital cost due to property acquisitions required  
  • Redesign and construction of Hurontario LRT required  
  • Potential for one heritage property and other property impacts and displacements  

Alternative 6: Portal (BRT tunnel under Dundas Street)  

Benefits:

  • BRT operations and reliability  
  • Maintains existing Cooksville cross-section and community character  
  • Operates at capacity with acceptable auto travel times  
  • Property impacts could be mitigated through revisions to active transportation  
  • Will improve the overall community character of Cooksville Village through transit oriented development that a BRT will bring to the area, however, a below-grade alternative is less consistent with a transit oriented community  

Drawbacks:

  • Significant cost and construction implications  
  • Highest technical complexity and engineering design due to tunnel, utility relocations, and vertical access  
  • Profile of BRT below grade introduces 6% grades  
  • Traffic and Hurontario LRT service impacts during construction  
  • Potential for heritage and other property impacts and displacements  
  • Additional right-of-way and property impacts and displacements for utility relocations and underground station requirements, alternative vertical accesses, ventilation and pumping station(s)  
  • Potential impacts to Cooksville Creek  

Short list of alternatives: Dundas Street in Mississauga – Cooksville pinch point 

 

The best performing short list of alternatives was evaluated against the following criteria:  

  • Alignment with the 2041 Regional Transit Plan goals and objectives  
  • Alignment with the objective of the Dundas BRT to provide a high-quality regional transit corridor  
  • Transit customer experience  
  • Transit travel times  
  • Capital cost  
  • Environmental considerations  
  • Geometrics/infrastructure considerations  
  • Mobility and traffic considerations  
  • Property considerations 

The Environmental Project Report will identify potential impacts and appropriate mitigation measures associated with the chosen alternative. 

 

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