gun club widening - arapahoegov.com
TRANSCRIPT
Gun Club WideningQuincy Avenue to Aurora Parkway
PresenterCathleen Valencia, PECapital Improvement Program Manager
Arapahoe County Public Works & Development
Existing Conditions
• Gun Club Road from Quincy Ave. to Aurora Parkway is currently 2-through lanes• Serves as a major north-south route• Receives a high amount of traffic
PCFI – Quincy and Gun Club
• North end of project - Partial Continuous Flow Intersection complete• More efficient intersection in a constrained space
• Pedestrian underpass
• More information at https://www.arapahoegov.com/QuincyGunClub
Aurora Parkway Transition
• South end of project• 2-lane road transitions to 6-lane road , Aurora Parkway
Similar Project
Arapahoe Road between Himalaya and Waco
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Data
• Traffic• Current – 26,000 vehicles per day
• 2040 – 45,000 vehicles per day
• Accidents• 88% rear end crashes
• Widening could reduce accidents by 60%
Noise
• According to CDOT website - doubling of traffic results in 3-decibel increase in noise, which would not normally be a perceptible noise increase
• 2020-2040 traffic increase along Gun Club is projected at 73%
How is Noise Defined?Zero decibels – threshold of human hearing40-50 decibels – normal for a peaceful neighborhood70-80 decibels – level adjacent to a busy urban street or 50’ from a major freeway120-140 decibels – typical level at which sound is painful
Historically, the County has not constructed noise mitigation for roadway projects.
• County must ensure policies are uniformly and consistently applied and provide equitable treatment for those impacted by highway traffic noise
• Currently no requirement for noise mitigation on local projects
• Noise mitigation must be justified to be equitable and fiscally sustainable
Noise – County and City Projects
When is a noise analysis required?
23CFR Part 772 – CDOT Noise Analysis and Abatement Guidelines1. Project is funded with Federal-aid highway funds2. Project requires FHWA approval (regardless of funding source)
CDOT Noise Analysis
Purpose – to determine if the project causes noise impacts and if noise abatement will be built as part of the project. (Source: CDOT Noise Analysis and Abatement Guidelines)Steps1. Determine Project Classification - addition of a through-lane 2,500’ or longer (Gun Club South – approx. 8,000 LF)
2. Noise Study Zone – 500’ from freeways and expressways, 300’ all other road types (from proposed edge of travel lane)
3. Land Use Categories – 7 categories• Residential – 66.0 dBA Leq (Equivalent Sound Level which represents an average of the sound energy occurring over a specific period)
• Identify Receptors (homes)
4. Noise Measurements – worst-noise hour conditions, receivers are placed outside facing the road
5. Existing Conditions Noise Model – validate using noise levels and traffic data
6. Design Year Noise Model – noise levels are calculated and evaluated through FHWA TNM software – typically 20 years in the future
7. Impact Analysis – design year noise level exceeds CDOT’s NAC at any receptor or exceeds 10dB or more from existing noise levels
8. Abatement Analysis – noise wall or earthen berm
• Feasibility – achieve a min. 5dB decrease for at least 3 receptors
• Reasonableness – 7dB decrease for at least 2 receptors, Cost/ Benefit must not exceed $34k per benefitted receptor
9. Benefitted Receptor Survey – abatement must be supported by a majority of respondents
CDOT Noise Analysis
• Parcel currently owned by E470• Excess soil from previous widening
project along E470• Noise study completed for E-470
widening • Noise levels were below federal requirements
for a noise wall for Dove Hill (60 dBA)
• Screen walls were built at some locations
• No plans to remove the berm at this time
• E470 is looking to sell the parcel• It will be up to the new owner what
happens to the berm
Berm
Project Overview
• Preliminary Design and Utility Relocation - $4.6M• 50/50 shared funding between Arapahoe County ($2.3M) and City of Aurora ($2.3M)
• City of Aurora leading design – Stanley Consultants
• Final Design and Construction – pending funding
Schedule• Finalize Preliminary Design – select alternate• Utility relocation• Final Design• Construction
Right-of-Way• ROW acquisition on west side of Gun Club• At this time no ROW needed on east side of Gun Club
Funding
Gun Club Road Widening
• Interim 4-lane, Ultimate 6-lane • Widening project will remove bottleneck and reduce congestion, improve safety, and provide sidewalks
Dove Hill – Crestline Circle Access Point
• Crestline Circle and Gun Club• Interim – full movement
• Ultimate condition – Signalized
Existing intersection – looking north
Dove Hill – Progress Circle Access Point
• Progress Circle and Gun Club• Interim – full movement
• Ultimate condition – Right in – Right out
Existing intersection – looking north