HomeMy WebLinkAboutAmelia Drive Traffic Safety StudyNantucket Planning &
Economic Development
Commission
Amelia Drive Evaluation:
Public Outreach Meeting
Public Safety Facility
4 Fairgrounds Road
Nantucket, MA
March 7, 2019 (6:00PM)
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Study Area
Amelia Drive
(1,300 Feet)
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Existing Conditions
Looking North from Ticcoma Way
23 feet
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Existing Conditions
Looking North towards Old South Road
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Existing Conditions
Looking North towards Old South Road
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Parking Spaces: 43
Trees: 42
Existing Conditions
60’40’
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Study Area
Amelia Drive
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Existing Traffic Volumes
2018 AM Peak Hour-DRAFT-
2018 PM Peak Hour-DRAFT-
Existing Traffic Volumes
LOS Unsignalized
Average Total Delay General Description
A < 10.0 Free Flow
B 10.1 to 15.0 Stable flow
C 15.1 to 25.0 Stable flow
D 25.1 to 35.0 Approaching unstable flow
E 35.1 to 50.0 Unstable flow
F > 50.0 Jammed
Traffic analysis based on Level of Service (LOS), delays, v/c, and queues.
§LOS –Letter scale based on average delay (seconds) per vehicle
§A =Free Flow (desirable)
§F =Traffic Jam (undesirable)
§Delay –The amount of time a car has to wait
Traffic Capacity Analysis
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Existing LOS
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Existing 95th Percentile Queue
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•Methodology
–Background traffic growth
–Traffic estimated to be generated by proposed
developments in the area
•Future Years Analyzed
–7 Years (2025)
–15 Years (2033)
–25 Years (2043)
Future Traffic Volumes
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Future Traffic Volumes
2025 AM Peak Hour-DRAFT-
Future Traffic Volumes
2025 PM Peak Hour-DRAFT-
Future LOS
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Future 95th Percentile Queue
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Conceptual Design Alternatives
The following alternatives for Amelia Drive were examined:
•Alternative 1
–One-Way
•Alternative 2
–Two-Way without Parking
•Alternative 3
–Two-Way with Parking
•Alternative 4
–Bicycle Accommodation and Parking
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Alternative 1A
One-Way Northbound – Parking on One Side
Parking Spaces: 42
Trees impacted: 0
ROW Impacts: None
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Alternative 1B
One-Way Northbound – Parking on Both Sides
Parking Spaces: 84
Trees impacted: 34
ROW Impacts: 1’ each side (2’ total)
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Net Volume Change
2025 AM Peak Hour
Amelia Drive 1-Way NB-DRAFT-
Net Volume Change
2025 PM Peak Hour
Amelia Drive 1-Way NB-DRAFT-
Level of Service Diagram
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Future 95th Percentile Queue
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Alternative 1C
One-Way Southbound – Parking on One Side
Parking Spaces: 43
Trees impacted: 0
ROW Impacts: None
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Alternative 1D
One-Way Southbound – Parking on Both Sides
Parking Spaces: 85
Trees impacted: 34
ROW Impacts: 1’ each side (2’ total)
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Net Volume Change
2025 AM Peak Hour
Amelia Drive 1-Way SB-DRAFT-
Net Volume Change
2025 PM Peak Hour
Amelia Drive 1-Way SB-DRAFT-
Level of Service Diagram
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Future 95th Percentile Queue
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Conceptual Design Alternatives
The following alternatives for Amelia Drive were examined:
•Alternative 1
–One-Way
•Alternative 2
–Two-Way without Parking
•Alternative 3
–Two-Way with Parking
•Alternative 4
–Bicycle Accommodation and Parking
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Alternative 2
Two-Way – No On-Street Parking
Parking Spaces: 0
Trees impacted: 0
ROW Impacts: None
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Conceptual Design Alternatives
The following alternatives for Amelia Drive were examined:
•Alternative 1
–One-Way
•Alternative 2
–Two-Way without Parking
•Alternative 3
–Two-Way with Parking
•Alternative 4
–Bicycle Accommodation and Parking
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Alternative 3A
Two-Way – Parking on West Side (Centered in ROW)
Parking Spaces: 35
Trees impacted: 37
ROW Impacts: 3.5’ each side (7’ total)
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Alternative 3B
Two-Way – Parking on West Side (Hold East Side)
Parking Spaces: 35
Trees impacted: 12
ROW Impacts: 6’ west side
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Alternative 3C
Two-Way – Parking on Both Sides
Parking Spaces: 70
Trees impacted: 33
ROW Impacts: 7’ each side (14’ total)
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Alternative 3D
Two-Way – Parking on East Side (Centered in ROW)
Parking Spaces: 35
Trees impacted: 36
ROW Impacts: 3.5’ each side (7’ total)
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Alternative 3E
Two-Way – Parking on East Side (Hold West Side)
Parking Spaces: 35
Trees impacted: 21
ROW Impacts: 7’ east side
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Conceptual Design Alternatives
The following alternatives for Amelia Drive were examined:
•Alternative 1
–One-Way
•Alternative 2
–Two-Way without Parking
•Alternative 3
–Two-Way with Parking
•Alternative 4
–Bicycle Accommodation and Parking
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Alternative 4A
Two-Way with Bike Lanes and Parking
Parking Spaces: 35
Trees impacted: 42
ROW Impacts: 10’ each side (20’ total)-DRAFT-
Alternative 4B
Two-Way with Mixed-Use Path
Parking Spaces: 35
Trees impacted: 42
ROW Impacts: 10’ each side (20’ total)-DRAFT-
Summary of Alternatives
Existing Conditions
Parking Spaces Trees
43 42
Amelia Drive Alternatives
Alternative Parking spaces Trees impacted ROW impacts
1A One-Way Northbound - Parking on One Side 42 0 None
1B One-Way Northbound - Parking on Both Sides 84 34 1' each side
1C One-way Southbound - Parking on One Side 43 0 None
1D One-way Southbound - Parking on Both Sides 85 34 1' each side
2 Two-Way - No On-Street Parking 0 0 None
3A Two-way - Parking on West Side (Centered in ROW)35 37 3.5' each side
3B Two-way - Parking on West Side (Hold East Side)35 12 6' west side
3C Two-way - Parking on Both Sides 70 33 7' each side
3D Two-way - Parking on East Side (Centered in ROW)35 36 3.5' each side
3E Two-way - Parking on East Side (Hold West Side)35 21 7' east side
4A Two-Way with Bike Lanes and Parking 35 42 10' each side
4B Two-Way with Mixed-Use Path 35 42 10' each side
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Thank you!
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