12/18/2012 The Don Valley Parkway How Toronto Keeps it in A1 Shape - - PDF document

12/18/2012 1 The Don Valley Parkway

How Toronto Keeps it in A1 Shape Winner of the 2003 APA Perpetual Pavement Award

Mark rk B Berk rkovitz itz Dece December 12, 12, 20 2012 12

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At the turn of the 19th century, the Don Valley was home to industrial uses such as mills and brickworks.

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Opening Ceremony: August 31, 1961 (Bloor Street to Eglinton Avenue)

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Highway construction facts:

• 4,600,000 m3 earth moved
• 1,250,000 m3 earth used for fill
• 1.2 km of CPR & CN rail track relocated
• 5 homes expropriated
• Cost estimate $28.7 million (1956)
• Actual cost $40.0 million (1966)
• Equivalent 2012 cost $274 million

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Lawrence Avenue Interchange (1966)

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Lawrence Avenue Interchange (1996)

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Lawrence Avenue Interchange (2008)

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Pavement Management Stats:

• 58 Mainline segments
• 50 Ramp segments
• Surveyed bi-annually

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Section 1 - Northbound 6+50m (14.216)

100 200 300 400 500 600 700 800 2 4 6 8 10 12 14 16 Chainage (m) Depth (mm) Depth to Granular (mm) Main Lanes

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100 200 300 400 500 600 700 800 12.5 13.0 13.5 14.0 14.5 15.0 DVP Chainage (km) Depth (mm)

Longitudinal GPR Trace Cross-Section GPR Trace

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Max Tensile Strain

Pavem ent Foundation

High Modulus Rut Resistant Material (Varies As Needed)

Durability Layer 75 - 100 mm 40-75 mm SMA, OGFC or Superpave

}

100 mm to 150 mm

Zone

• f High

Compression

from Newcomb – Perpetual Pavements (2009)

Perpetual Pavement - Defined

• Fatigue cracking and rutting are reduced
• Pavement distresses are confined to upper wearing laye
• Minimized maintenance and rehabilitation costs
• Quick repairs during overnight and weekend closures
• Reduced user-delay impacts on motorist
• Extended pavement life = lower life cycle costs
• Asphalt material that is milled is recyclable = added

benefit to the environment

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Benefits of Perpetual Pavements

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Pavement Structure/Design Stats:

• Composite Pavement Modulus:

1200-2500 MPa

• Effective Structural Number (SNeff):

200 mm (min)

• Design Structural Number (SNdes):

148 mm

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Surface Courses over the years: 1st Resurfacing (late 1970s to mid 1980s)

• Asphalt containing asbestos fibres
• Asphalt containing steel slag aggregates
• Open friction course

2nd Resurfacing (mid 1990s to late 2000s)

• Dense Friction Course
• Stone Mastic Asphalt (SMA)
• Shingle modified SMA asphalt mixes
• HL 1 (High Stability)
• SuperPave FC1

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Resurfacing Projects typically include premium materials and processes. Placing Stone Mastic Asphalt on Bayview-Bloor Ramps, 2005

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Placing Stone Mastic Asphalt on Bayview-Bloor Ramps, 2005

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Echelon Paving on Bayview-Bloor Ramps, 2005

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Criteria:

• Service life of 35 years or more
• Resurfacing intervals of no less

than 12 years

• No structural failures
• Minimum maintenance throughout

service life

Requirements for the Perpetual Pavement Award

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(EXISTING MEDIAN) BBL EXISTING 3 SB LANES @ 3.65 ( + / - ) OUTER SHOULDER SOUTHBOUND 10.97 (EXISTING MEDIAN) BBL EXISTING 3 SB LANES @ 3.65 ( + / - ) OUTER SHOULDER NORTHBOUND 10.97

TYPICAL SECTION NOT TO SCALE

GO Transit Bus By-Pass Lanes (BBL)

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Who else is riding on the Don Valley Parkway:

Heart & Stroke Foundation – Ride for Heart Celebrating 25 Years, 1987-2012 Canada’s single largest charity cycling event 13,000 cyclists Funds Raised: $5 million (2012) www.rideforheart.ca

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Thank You

References:

• Perpetual Pavements Presentation - NAPA
• Websites:

– Wikipedia – Get Toronto Moving – Heart & Stroke Foundation – The Star – University of Toronto

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