12/18/2012 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 December 12, Dece 12, 20 2012 12 2 Opening Ceremony: August 31, 1961 At the turn of the 19 th (Bloor Street to Eglinton Avenue) century, the Don Valley was home to industrial uses such as mills and brickworks. 3 4 1
12/18/2012 Lawrence Avenue Interchange (1966) Highway construction facts: - 4,600,000 m 3 earth moved - 1,250,000 m 3 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 5 6 Lawrence Avenue Interchange (1996) Lawrence Avenue Interchange (2008) 7 8 2
12/18/2012 9 10 Pavement Management Stats: • 58 Mainline segments • 50 Ramp segments • Surveyed bi-annually 11 12 3
12/18/2012 Section 1 - Northbound Lane 2 Perpetual Pavement - Defined 0 100 200 Depth (mm) 300 40-75 mm SMA, OGFC or Superpave } 400 100 mm Zone 500 to of High 600 150 mm High Modulus Compression 700 Rut Resistant Material 800 (Varies As Needed) 12.5 13.0 13.5 14.0 14.5 15.0 DVP Chainage (km) Cross-Section GPR Trace Longitudinal GPR Trace Durability Layer Section 1 - Northbound 6+50m (14.216) Max Tensile Strain 0 75 - 100 mm 100 200 Depth (mm) 300 400 Pavem ent Foundation 500 600 700 800 from Newcomb – Perpetual Pavements (2009) 0 2 4 6 8 10 12 14 16 Chainage (m) 13 14 Depth to Granular (mm) Main Lanes Benefits of Perpetual Pavements Pavement Structure/Design Stats: • Composite Pavement Modulus: 1200-2500 MPa • Effective Structural Number (SN eff ): 200 mm (min) • Fatigue cracking and rutting are reduced • Design Structural Number (SN des ): 148 mm • 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 15 16 4
12/18/2012 Resurfacing Projects typically include premium materials and processes. Placing Stone Mastic Asphalt on Bayview-Bloor Ramps, 2005 Surface Courses over the years: 1 st 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 17 18 Placing Stone Mastic Asphalt on Echelon Paving on Bayview-Bloor Ramps, 2005 Bayview-Bloor Ramps, 2005 19 20 5
12/18/2012 Requirements for the Perpetual Pavement Award GO Transit Bus By-Pass Lanes (BBL) NORTHBOUND SOUTHBOUND OUTER OUTER Criteria: SHOULDER (EXISTING MEDIAN) (EXISTING MEDIAN) 10.97 SHOULDER 10.97 BBL EXISTING 3 SB LANES @ 3.65 ( + / - ) BBL EXISTING 3 SB LANES @ 3.65 ( + / - ) • Service life of 35 years or more • Resurfacing intervals of no less than 12 years • No structural failures • Minimum maintenance throughout TYPICAL SECTION service life NOT TO SCALE 22 21 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 23 24 6
12/18/2012 References: Thank You Perpetual Pavements Presentation - NAPA • Websites: • Wikipedia – Get Toronto Moving – – Heart & Stroke Foundation The Star – University of Toronto – 25 26 7
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