link to jc-73 public meeting presentation pdf 772 mb - jeffco
TRANSCRIPT
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Project Goals: • Improve connectivity for bicycles
and pedestrians.
• Reduce future traffic congestion.
• Improve safety
• Enhance accessibility toDowntown Evergreen with additional parking and shared-use paths.
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Bicycle and Pedestrian Facilities • Narrow shoulders • No bike lanes • Minimal sidewalks at the north and south end of project area • Stairs to active roadwayshoulders • Social paths on top of existing rock walls
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Parking
• Gravel lots • No delineated parking
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Deficient Roadway Safety Features
• Rock outcroppings limit driver sight distances • Insufficient turn lanes for properties and approach roadways • Steep roadside embankments
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Corridor Crash History January 1, 2014 through December 31, 2018
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Looking North Towards Downtown Evergreen
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• Increased left-turn lane storage forBuffalo Park Road. • Lengthen merge area for Northbound JC-73 lane drop.
• Maintains existing driveways. • Provides designated left turn lanes to properties. • Minimizes impact to creek. • Lengthen merge areafor Northbound JC-73 lane drop.
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• Dedicated parking areas • 8-foot Shared use path on the creek side. • Alignment shift for improved sight lines. • Intersection improvements at Little Cub Creek.
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• Excavation of rock outcropping and improved driver sightlines. • Dedicated parking area. • 8-foot Shared use pathto Downtown Evergreen. • 5-foot sidewalk on creek side. • Construct retaining wall on east. • Extend existing boxculvert.
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Looking North Towards Downtown Evergreen
• Increased left-turn lane storage for Buffalo Park Road. • Exterior southbound lane transitions into a right turn to BuffaloPark Road.
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• Maintains existing driveways. • Provides designated left turn lanes to properties. • Minimizes impact to creek. • 8-foot Shared use path on the creek side.
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areas.
• Intersection
Cub Creek.
• Dedicated parking
• 8-foot Shared use path on the creek side. • Construct retaining walls and excavate rock outcropping along west side.
improvements at Little
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• Excavation of rock outcropping and improved driver sightlines. • Dedicated parking area. • 8-foot Shared use path to Downtown Evergreen. • 5-foot sidewalk on creek side. • Construct retainingwall on west and east side. • Extend existing boxculvert and reroute creek.
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*Jefferson County will coordinate with property owners once the preferred alternative is identified and the project moves to preliminary design.
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+ Positive Outcome, - Negative Outcome, Neutral
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Benefits • Driver familiarity • Improvement to delays with optimization of traffic signals. • Smaller footprint
Shortcomings • Higher maintenance costs compared to a roundabout intersection • Additional vehicle conflict points
Traffic Level of Service • AM: LOS B • PM: LOS C
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Benefits • Reduces accident severity • Lower vehicle speeds • Lower maintenance costs compared to
traditional • Safer pedestrian crossings.
Shortcomings • Less gaps between vehicles to enter • Large footprint
Traffic Level of Service • AM: LOS A • PM: LOS C
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+ Positive Outcome, - Negative Outcome, Neutral
• One-way front-in angledparking east of Church. • Parallel parking west side, south of JC-73/ SH-74 intersection.
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• One-way back-in angledparking east of Fire Station. • Parallel parking westside, south of JC-73/ SH-74 intersection.
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Suggested Locations: • In front of church in the 3-lane concept. • At the bend south of the JC-73/JC-74 intersection.
Benefits: • Cars can fit in smaller parking spaces. • Visibility of all road users when parking.
Shortcomings: Provides less parking spaces compared to angled parking options.
Figure 1: Source: Google 2020 Downtown Evergreen, Colorado
Figure 2: Source: Google 2020 Golden, CO
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Suggested Location: Across from Church
Benefits: • Angled parking provides moreparking spaces compared toparallel parking. • Conventional driving maneuver.
Shortcomings: • Limited visibility of approaching vehicles, bicyclists and otherroad users.
Figure 1: Source: Google 2020 Downtown Evergreen, Colorado
Figure 2: Source: Google 2020 Golden, CO
Suggested Location: • Across from existing fire station in both concepts.
Benefits: • Improved visibility of approachingbicyclists and on-coming traffic existing parking spot. • Reduces bike/car crash potential. • Provides more parking spaces compared to parallel parking.
Shortcomings: • Limited driver experience maneuver.
Figure 1: Source: Google 2020 Columbia, Canada
E. 7th Avenue and Logan Street
Boulder, CO 80302
Figure 2: Source: City of Kelowna, British
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Denver, CO 80203
Figure 3: Source: Google 2020University Avenue between 17th Street and Broadway Figure 4: Source: T. Boulanger, Transportation
Services, City of Vancouver, WA.
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Public Feedback Survey: https://www.surveymonkey.com/r/JC-73
Project Website: https://www.jeffco.us/jc-73
Jefferson County Contact: Brad Bauer, PE
Jefferson County Project Manager
100 Jefferson County Parkway
Golden, CO 80419
Tel 303-271-8795
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3-Lane Cross Section Fact Sheet
• 1-Northbound and 1-Southbound Lane • 1 Two-way center left turn lane • Southbound JC-73 bike lane • 8-foot shared-use path on thenorthbound creek side • Establishes four parking lots:
• One-way front-in angle parking across from Church • Parallel parking in front of Church • Back-in angle parking across from Fire Station • Parallel parking south of JC-73/SH-74 intersection
+Additional parking lots +Lower property impacts +Maintains and improves access to residences and businesses. +Lower cost -Fewer environmental impacts oMinimal congestion improvement oSomewhat efficient construction phasing.
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5-Lane Cross Section Fact Sheet
• 2-Northbound and 2-Southbound Lane • 1 Two-way center left turn lane • Southbound JC-73 bike lane • 8-foot shared-use path on thenorthbound creek side • Establishes three parking lots:
• One-way front-in angle parking across from Church • Back-in angle parking across from Fire Station • Parallel parking south of JC-73/SH-74 intersection
+Additional parking lots +Enhanced congestion improvement +More efficient construction phasing -High property impacts -May require removalof Plettner Lane but improves accessto residences and businesses elsewhere. -High environmental impacts -High cost