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