12/18/2012 The Don Valley Parkway How Toronto Keeps it in A1 Shape Winner of the 2003 APA Perpetual Pavement Award Mark Berkovitz December 12, 2012 2 Opening Ceremony: August 31, 1961 At the turn of the 19th (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 Highway construction facts: Lawrence Avenue Interchange (1966) - 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 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 0 Perpetual Pavement - Defined 100 200 ) 300 40-75 mm SMA, OGFC or Superpave 400 Depth (mm Depth 500 100 mm Zone to 600 of High 150 mm High Modulus 700 } Compression 800 Rut Resistant Material 12.5 13.0 13.5 14.0 14.5 15.0 (Varies As Needed) DVP Chainage (km) Cross-Section GPR Trace Longitudinal GPR Trace Section 1 - Northbound 6+50m (14.216) Durability Layer 0 Max Tensile Strain 100 75 - 100 mm 200 ) 300 400 Depth (mm Depth 500 Pavement Foundation 600 700 800 from Newcomb – Perpetual Pavements (2009) 0 2 4 6 8 10121416 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 (SNeff): • Fatigue cracking and rutting are reduced 200 mm (min) • Design Structural Number (SNdes): • Pavement distresses are confined to upper wearing laye 148 mm • 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: 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 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) SOUTHBOUND NORTHBOUND OUTER OUTER (EXISTING MEDIAN) SHOULDER Criteria: SHOULDER 10.97 (EXISTING MEDIAN) 10.97 EXISTING 3 SB LANES @ 3.65 ( + / - ) BBL 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 21 22 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.