Presentation
HIGHWAY NOISE MITIGATION UPDATE SIX MILE ROAD OFFRAMP PRESENTATION
July 16, 2024Pages 28–4010 sections
A slide deck visualizing the findings of the acoustic study and the proposed wall alignments.
Date: July 16, 2024Identifies Casey Place and Lund Road as high-noise areas (> 65 dBA)Proposes 5m wall heights
HIGHWAY NOISE MITIGATION UPDATE SIX MILE OFF-RAMP
HIGHWAY NOICE MITIGATION UPDATE SIX MILE ROAD OFFRAMP JULY 16, 2024
Project Summary C-179: Noise Barrier Feasibility – Hwy. 1 Offramp to Six Mile Road
Page 28–40
Acoustic Study Findings – Existing Environment
- Standards for residential environment (non-work related) is lacking.
- Closest Metric: ANSI/ASA S12.9 Part 5: Land use compatibility for Multiple Family Residences with Moderate Outdoor Use
- Data Collection: 3 Day Monitoring Period April 2024 (BKL Consulting)
Page 28–40
Acoustic Study Findings – Design Criteria
MoTI Policy for Assessing & Mitigating Noise Impacts from New and Upgraded Numbered Highways:
- Noise Benefit >= 5dBA improvement at fronting residences
Physical Limitations:
- Wall height: 5m
Data Collection: 3 Day Monitoring Period April 2024 (BKL Consulting)
Page 28–40
Solutions – 3 Alignments
General Findings and Trends:
- Adequate noise mitigation can be achieved at: Casey Place and some residences in Lund Road and Massey Place neighbourhood depending on extent of noise mitigation
- Noise mitigation performance diminishes towards Six Mile Road
- A barrier along the offramp is ineffective in the Thetis Vale / Lower Lund neighbourhood
Page 28–40
Alignment #1 – Singular Wall
Pros:
- Benefits the homes closes to Hwy 1
Cons:
- Less benefit to mid Lund Rd
- Geotechnical challenges
Page 28–40
Alignment #2 – Singular Wall: Extended
Pros:
- Greater noise improvement coverage
Cons:
- Higher costs (known-unknowns, unknown-unknowns)
- Environmental impacts (trees)
Page 28–40
Alignment #3 – Two Walls
Pros:
- Greatest noise improvement coverage
Cons:
- Higher costs (Capital and Operational)
- MoTI permitting and agreements
Page 28–40
Trade-offs – Understanding the Impacts
[Diagram: A triangle representing the trade-offs between "Feasibility & the Environment", "Costs", and "Equity"]
Page 28–40
Trade-offs – Understanding the Impacts
| Alignment # | Feasibility & the Environment | Equity | Operational Costs | Capital Costs¹ |
|---|---|---|---|---|
| #1 | The most feasible. Less impacts to the environment | Benefit to Casey Pl / North Lund Area | Significant but less impactful than other alignments. Less damage prone | $670k-$1.1M |
| #2 | Extension into rock cut = challenges. Impacts to trees. More info needed | Benefit to most homes directly adjacent to Six Mile offramp | Higher cost risk for barrier maintenance on top of rock cut | $930k-$1.5M |
| #3 | Additional permitting requirements and agreements with MoTI | Addresses most homes in Neighbourhood with Hwy noise >= 65dBA | Highest costs to maintain Hwy 1 Barrier | $1.3M-$2M |
¹ Refer to staff report for unit rates and assumptions of risk to costs
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COUNCIL OPTIONS
| Option | Description |
|---|---|
| Option #1 (Recommended) | THAT Council receive the staff report for information |
| Option #2 | THAT Council direct staff to proceed to detail design for one of the alignments identified in the staff report. AND THAT Project Summary C-179 be amended in the future 2025-2029 Financial Plan to include construction costs at a future date. |
Ivan Leung, P.Eng Director of Engineering engineering@viewroyal.ca
Page 28–40
Extracted from: 2024 07 16 Council Agenda - Agenda - Pdf