transportation and mobility
DESCRIPTION
TRANSCRIPT
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TONIGHT’S AGENDA16 November
Introduction to CHASSA
Forum #1: ‘TRANSPORATION + MOBILITY’
Questions and Answers
Consultant Working Session with CHASSAC
Confirm Next steps/ Forum #2
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What is CHASSA? 10 Month Study initiated by the City
Redevelopment Agency
About 80 acres - entry to Healdsburg
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Who is Doing the Study?
An inter-disciplinary team comprised of:
• Urban designers • Economic development specialists• Transportation planners• Environmental consultants• Civil engineers• Landscape architects• Specialists in sustainability, CEQA
and community outreach
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Study Area for Transportation
Plan Area
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Transportation Planning & Traffic Engineering
What we do Collaborate with team Plan mobility and
accessibility Analyze effects of land use Forecast travel “demand” Assess travel patterns Assess streets and
intersections Design multi-modal facilities Estimate parking needs Assess safety Conduct impact analyses
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Transportation Planning Basics
Terms Level of Service /
Quality of Service
Automobile Level of Service
User Quality of Service
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Level & Quality of Service
Level of Service Letter grades A – F Based on speed and
delays for automobiles
Quality of Service Letter grades A – F Based on perception of
users
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Automobile Level of Service
LOS A LOS C
LOS DLOS F
Images courtesy of Jim Charlier
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Multi-modal Streets
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Complete StreetsReallocating Street Width to Accommodate All Users
4 lane street narrowed to 2 lanes to add bike lanes
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What is Connectivity?
Connectivity refers to the density of connections in path or road network and the directness of links.
As connectivity increases, travel distances decrease and route options increase, allowing more direct travel between destinations.
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Pedestrian Connectivity
Complete sidewalk grid
ADA accessible
Short blocks
Pathways through parking lots to the doors of buildings
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Pedestrian Capture Zone
½ mile walk radius to station
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Bicycle Connectivity
Complete network of bike paths, lanes and wide shoulders
Connects to regional trail system and SMART station
Signed routes and maps for wayfinding
Short-term and long-term bicycle parking at destinations
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Bicycle Capture Zone
1½ mile bike radius to station
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Context Sensitive Solutions (CSS)
Harmony Balance Compatibility
16Photo: Community, Design + Architecture
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All users Compact and mixed-
use Varying densities Pedestrian-scaled:
Blocks Buildings / signs Landscape Streets
Streets complement uses
Streetscapes with interest and amenity
Walkable Places
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Photo: Kimley-Horn and Associates, Inc.
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All Streets Can Be Walkable
Different functional emphasis
Serve all users
Different approaches to enhance walkablility
Low volume main street
High volume arterial
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Bringing Place and Transportation Design Together
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E14th Corridor - San Leandro, CA Source: Community, Design + Architecture and Urban Advantage
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E14th Corridor - San Leandro, CA Source: Community, Design + Architecture and Urban Advantage
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Bringing Place and Transportation Design Together
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Overview of Major Transportation Study Elements
US 101 interchanges
Healdsburg / Westside / Vine / Mill 5-way intersection
Station area access and connectivity
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Types of Issues Addressed in Station Area Plans
Balance modes
Land uses Parking Connections Crossings Station access Cost ADA Efficiency Barriers Placemaking
Bus and auto circulation
Bike circulation
Pedestrian circulation
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US 101 Interchanges
Evaluate: Full
interchange Configurations Travel patterns 5-way Closure of
ramps
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Change in Travel Patterns
Current travel patterns
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Change in Travel Patterns
Potential travel patterns
Highly interactive interchange and roundabout
Traffic concentrated on Mill
Access control
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Modern Roundabouts
How do they work?
When are they used?
What are the pros and cons?
Roundabouts are NOT traffic circles!
Source: Kimley-Horn and Associates, Inc.
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How Roundabouts Work
Entering traffic yields
Counterclockwise 20-25 mph Autos yield to
pedestrians and bicyclists
Bikes merge Ride in middle of
lane Bikes may use
sidewalk
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Source: NKAPC and DLZ Corporation
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Two-Lane Modern Roundabout
Source: Kimley-Horn and Associates, Inc.
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Source: www.pedbikeimages.org / Dan Burden
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Roundabouts and Pedestrians
Safer than conventional intersections
Cross one direction of traffic
Crossing visible to motorist
Crossings separate from entry and exit
Cross behind vehicles Refuge on splitter island Concern for the visually
impaired
Source: Canes and Tails A blog for Orientation and Mobility Specialists
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When to Use
Safety problems Capacity problems Closely spaced
intersections Unusual geometry –
multiple legs Where sight is
obscured Gateways Retrofit projects
Source: Kimley-Horn and Associates, Inc.
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Roundabout Pros
Minimize stopping / delay Fewer and less severe crashes Solves skewed, unusual or multi-leg
intersections More capacity than traffic signals Lower fuel consumption Reduces carbon emission Attractive gateways
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Roundabout Cons
More right of way Learning curve Initial public uncertainty Bicyclists uncomfortable Blind pedestrian concern