Country Lanes Asphalt Alternative David Desrochers - Streets Design Engineer David Yurkovich- Greenways Landscape Designer City of Vancouver 1 Country Lanes Concept Community Vision “The pleasant rural character and safe walking environment that still exists in many Dunbar lanes should be kept. There should be options to fully-paved lanes.” -Dunbar Community Vision 2 CITY OF VANCOUVER POLICY “Ultimately, the City’s objective should be to incorporate enhanced sustainability into all the City Operations as a ‘way of doing business’” -City of Vancouver Corporate Management Team 3 Demonstration Project Lane Selection • City Counsel approved $150,000 to fund construction of three demonstration Lanes • Wanted to test a variety of conditions (i.e. lanes with differing geometries, usage patterns, and design challenges) Fraser Lane Maple Lane Yale Lane 4 • Locations from across Vancouver. Downtown Burnaby Vancouver Richmond 5 Country Lane South of Fraser St. Contex -Singlet family residential in East Vancouver -Feeds in to commercial lane to West -13 lots access lane - Active residents group that had previously organized to participate in community improvements 6 Public Process Meetings were held at local community centers for each of the 3 locations chosen for the pilot project : Item discussed • Goals of project • Materials being considered • Maintenance • Potential landscaped area 7 Country Lane First Project- 700 E 27th Ave. Design Features: • Formed concrete driving strips and lane entrances • Permeable paver driveway connections and lane entrances • Sodded structural grass centre strip • Seeded structural grass edge strips • Small planted areas along some fences 8 Design Elements Reinforced turf Garage Planted swale 90cm 80cm 87cm 80cm 247cm Concrete Driveway conection- driving strips Permeable pavers 9 OR Golpla Turf Country Lane Reinforcement Components Permeable Pavers Engineered Soil Base Reinforced Turf Concrete Driving Strips 10 COMPONENTS Reinforced Turf • Plastic cells provide rooting area that is not subjected to compaction • Distributes pressure over base • Grass root development integrates plastic pavers with base material providing a more stable and stronger system 11 COMPONENTS Permeable Pavers • Provides a more durable surface where higher traffic volumes expected • Tabs on paver edges provide 1” Gaps allowing for infiltration 12 COMPONENTS Base Material • Aggregate interlock provides structural stability while allowing runoff to infiltrate • Void space filled with sandy soil mixture Components: ~ 70% ¾” aggregate ~ 30% sand/soil mixture 13 Community Work Party 14 Community Work Party 15 Country Lanes Results • Traffic Calmed • Aesthetically pleasing Environmental Benefits • Reduced flow into City’s Sewer System • Replenishes groundwater • Filter pollution at the source • Reduced Heat Island with “Cool” Surface 16 Country Lane - Performance Infiltration Existing Subsoil: 214 mm/hr Engineered Base: 200 – 600 mm/hr Permeable Pavers: 28 mm/hr Country Lane Adjacent Paved Lane Runoff Comparison During Same Storm Event 17 Performance Grass Growth Grass Growth After Winter Season 18 2. Maple Street Lane •Tried to address shortcomings of first constructed lane •Experiment with different materials •Streamline design and construction to reduce costs 19 Country Lane - 2 Solution • Pre-grow grass pavers 20 Country Lane 2 New use of material •Permeable Paver entrance aprons •Gravel filled driving strips 21 Country Lane 2. New use of materials •Recycle sidewalk for driveway connections •Boulders defining planted swales 22 2. Maple Street Lane 23 Country Lane 3. Yale Street Design Features: • Dry-mix roller compacted concrete driving strips • Granite cobble lane entrances • Gravel-filled structural grass driveway connections • Seeded structural grass 24 Costs Full Width Option Center Strip Country Lane option $120 per liner foot $60 per liner ft $240 per liner ft ( $48000 ) ( $24000 ) ( $96000 ) 25 COUNTRY LANES Conclusion 26 Other City Initiatives Infiltration Bulge 27 Crown Street 28.