Master Plan Overview Project Definition
South Boulder Road – Malory Street to 120th Street • Widening and Multimodal Improvements • Intersection Improvements at 120th Street
120th Street – Emma Street to Horizon Avenue • Widening and Multimodal Improvements • Intersection Improvements at Emma Street • 120th Street Bridge over Coal Creek
Definition of the Problem
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MALO
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The following elements are included in the project scope: • Master Plan
120TH ST
Project Components
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SIR GALAHAD DR
The 120th Street and South Boulder Road corridors have operational and safety deficiencies and experience frequent traffic congestion. Both roadways are important transportation corridors supporting mobility in the City of Lafayette and Boulder County. Improvements are needed to: • Meet current and future traffic demands • Improve operational efficiency EMMA ST of the roadways • Improve traveler safety through FLAGG DR the study area • Accommodate multimodal connections
S BOULDER RD AVALON AVE
»» Multimodal Evaluation ¯¯ Data collection ¯¯ Travel demand forecasting ¯¯ Typical section determination »» Geotechnical Investigation »» Structural Alternatives Evaluation (at Coal Creek) »» Conceptual Roadway Design
• Public Involvement • Preliminary Design
LEGEND 0
Project Study Area 750
HORIZON A VE
1,500
Scale in Feet Source: GoogleEarth
3000 ft
120TH & SOUTH BOULDER ROAD MASTER PLAN
Level of Service (LOS) Descriptions Unsignalized Intersections
Signalized Intersections
LOS Description
LOS Description
A
A
No vehicle waits longer than one signal indication
B
On a rare occasion vehicles wait through more than one signal indication
C
Intermittently vehicles wait through more than one signal indication, occasionally backups may develop, traffic flow still stable and acceptable
D
Delays at intersections may become extensive, but enough cycles with lower demand occur to permit periodic clearance, preventing excessive backups
E
Very long queues may create lengthy delays
F
Backups from locations downstream restrict or prevent movement of vehicles out of approach creating a “gridlock� condition
Average control delay per vehicle for the yielding movement does not exceed 10 seconds.
LOS A A B
Average control delay per vehicle for the yielding movement is less than 15 seconds.
LOS B B C
Average control delay per vehicle for the yielding movement is less than 25 seconds.
LOS C C D
Average control delay per vehicle for the yielding movement is less than 35 seconds.
LOS D D E
Average control delay per vehicle for the yielding movement is less than 50 seconds.
LOS E E F
Average control delay per vehicle for the yielding movement is greater than 50 seconds.
LOS F F Source: Highway Capacity Manual, 2010
120TH & SOUTH BOULDER ROAD MASTER PLAN
Existing Multimodal Conditions South Boulder Road Crosswalk Counts Robin Hood St Crossing
2/0 1/0
Sir Galahad Dr Crossing
10/5 1/1
Emma St
Flagg Dr
2/0 1/0
Avalon Ave Crossing
0/0 0/0 10/5 1/1
20/10 2/1
Fu
ture
Trail
<5/<5 1/2 al Co
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15/10 10/5
0/0 0/2
120th St
15/25 5/5
Avalon Ave
5/5 10/5
Round Table Dr
Robin Hood St
Lamont Does Memorial Park
able Dr dT
South Boulder Rd
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Ma
St
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Sir Galahad Dr
10/5 1/1
0/0 0/0
Coal Creek T
LEGEND
Bus Stop
Crosswalk
Crosswalk with Pedestrian-Activated Signal
Pedestrian and Bicycle Counts 3-4 PM (School Peak Hour) / 4:30-5:30 PM (Traffic Peak Hour) Count Extents Along South Boulder Road Frequent Crossing Location without Crosswalk XX/XX Pedestrian Counts XX/XX Bicycle Counts (mix of on-street and sidewalk) Note: Observations are from September 2013. 120TH & SOUTH BOULDER ROAD MASTER PLAN
Existing Traffic Volumes and Levels of Service
Emma St
225/45 425/200
F/C Flagg Dr
7,600
100/40 145/465
85/60 60/30
Sir Galahad Dr
re tu l Fu rai T able Dr dT
un Round Table Dr
120th St
Avalon Ave
8,000
ra il
al C Co Coal Creek T
195/170 145/210 0/3
120/365 1/1 165/135
1/2 1/3 1/1
re ek
D/E 250/135 225/90 1/0
Lamont Does Memorial Park
Robin Hood St
South Boulder Rd
6,500
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LEGEND xxxx xxx/xxx X/X
Daily Traffic Volumes (vehicles per day) AM/PM Peak Hour Traffic Volumes AM/PM Peak Hour Levels of Service (unacceptable LOS and critical movement in RED) Stop Sign
Note: Counts collected in September 2013. 120TH & SOUTH BOULDER ROAD MASTER PLAN
Options Considered
120th Street
South Boulder Road
Two options for the alignment of 120th Street were examined. • Existing Alignment - future trail would use old railroad right-of-way • Realignment - 120th Street would curve along the old railroad right-of-way and the future trail would be separated along the existing roadway right-of-way
Both a three-lane and four-lane typical section were considered for South Boulder Road.
EXISTING ALIGNMENT
Three-lane Option 80’ EXISTING ROW
REALIGNMENT
EMMA ST
EMMA ST
varies
FLAGG DR
6’ Walk
4’ Buffer
FLAGG DR
6’ Bike Lane
AVALON AVE
120TH ST
SIR GALAHAD DR
S BOULDER RD
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120TH ST
B TA
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AVALON AVE
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B TA S BOULDER RD
10’ Raised Median
12’ Traffic Lane
1’ Gutter Pan
6’ 4’ min. Bike Buffer Lane
1’ Gutter Pan
10’ Path
2’ Gutter Pan
Three-lane Option Chosen: • Acceptable vehicular operations/capacity • Safer at-grade pedestrian crossings • Sidewalk/path buffer • Wider bike lane • Area to accommodate utilities and drainage • Less cost
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ND
U RO
SIR GALAHAD DR
2’ Gutter Pan
12’ Traffic Lane
Four-lane Option 80’ EXISTING ROW
0
Roadway Alignment Existing Trail Future Trail 750 Scale in Feet
1,500
HORIZON A VE
HORIZON A VE
Source: GoogleEarth
LEGEND
5’ Walk
2’ Gutter Pan
5’ Bike Lane
12’ Traffic Lane
12’ Traffic Lane
1’ Gutter Pan
10’ Raised Median
12’ Traffic Lane
1’ Gutter Pan
12’ Traffic Lane
5’ Bike Lane
5’ Walk
2’ Gutter Pan
Existing Alignment Chosen: 3000 ft 3000 ft • Operational/safety issues with at-grade pedestrian crossing on west approach of 120th/ South Boulder Road Signal • Less right-of-way impacts • Less cost 120TH & SOUTH BOULDER ROAD MASTER PLAN
Proposed Multimodal Elements Crosswalks with pedestrian-activated signals Emma St
10’ median allows for pedestrian/ bike refuge at potential future at-grade trail crossing
Flagg Dr
Existing pedestrian crossings shifted approximately 30’ to west to allow for median refuge
Sir Galahad Dr
re tu l Fu rai T able Dr dT
un
South Boulder Rd
6’ Bike Lanes
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Avalon Ave
Round Table Dr
Robin Hood St
Lamont Does Memorial Park
6’ Bike Lanes
New crosswalk
120th St
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Crosswalks with pedestrian-activated signals
Coal Creek T
Attached sidewalk
LEGEND
6' Sidewalk
Crosswalk
8' Sidewalk
Crosswalk with Pedestrian-Activated Signal
10' Multiuse Path
Bus Stop
Note: All sidewalks/multiuse paths detached except where noted. 120TH & SOUTH BOULDER ROAD MASTER PLAN
Next Steps
• Stakeholder Meetings (May 2014)
ject o r is P
Th
• Master Plan Report (May 2014) • Preliminary Design (Summer 2014) »»Drainage »»Utilities »»Right-of-Way
• Public Meeting #2 (August 2014) »»Presentation of Preliminary Design
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u Fut
ort ff E re
• 120th Bridge over Coal Creek (Separate Project) • Identify Construction Funding • Final Design and Clearances • Right-of-Way Acquisition • Project Construction
120TH & SOUTH BOULDER ROAD MASTER PLAN
Signalized pedestrian crosswalk with refuge
Pedestrian crosswalk with refuge
SOUTH BOULDER ROAD
120TH STREET
ROUND TABLE DR
MALORY STREET
Existing pedestrian crosswalk
SIR GALAHAD DRIVE
South Boulder Road Conceptual Layout
New pedestrian crosswalk with refuge
SOUTH BOULDER ROAD
Traffic Signal
10-foot multiuse path
Existing right turn lane remains
Eastbound left turn lane
120TH STREET
AVALON AVENUE
SARATOGA DRIVE
Pedestrian crosswalk with refuge
ROBIN HOOD STREET
Potential sidewalk improvements along park
LEGEND Proposed Right-of-Way Property Lines Lafayette City Limits
Buffer (Landscaping, Xeriscaping, Brick Pavers, etc.) Future Multiuse Trail
N
120TH & SOUTH BOULDER ROAD MASTER PLAN
120th Street Conceptual Layout
EMMA STREET
SOUTH BOULDER ROAD
COMMERCE COURT Southbound acceleration lane
Channelized right turn lane
Eastbound right turn lane
Traffic Signal
120TH STREET
120TH STREET 120TH STREET Northbound left turn lane Ramp transitions to bike lanes
10-foot multiuse path
Northbound left turn lane
Southbound left and right turn lanes
Future at-grade trail crossing with refuge
HORIZON AVENUE
Southbound right turn lane
FLAGG DRIVE
LEGEND
Proposed Right-of-Way Property Lines Lafayette City Limits
Buffer (Landscaping, Xeriscaping, Brick Pavers, etc.) Future Multiuse Trail
N
120TH & SOUTH BOULDER ROAD MASTER PLAN