Settling the Score: Street Performance Measures

Maryland-National Capital Park and Planning Commission Maryland-National Capital Park and Planning Commission

NEXT GENERATION BICYCLE PLANNING

Montgomery County Planning Department

David Anspacher, Montgomery County Planning Department

Background

• Funding Source:

– Metropolitan Washington Council of Govts Transportation Land Use Connections Program

• Consultant Team

– Kittelson & Associates

– Toole Design Group

LOUDOUN COUNTY, VA

FREDERICK COUNTY, MD

FAIRFAX COUNTY, VA

HOWARD COUNTY, MD

WASHINGTON, DC

MONTGOMERY COUNTY, MD

PRINCE GEORGE’S, MD

Population: 1 million Area: 507 sq miles

LOUDOUN COUNTY, VA

FAIRFAX COUNTY, VA

HOWARD COUNTY, MD

WASHINGTON, DC

AGRICULTURAL RESERVE

LOUDOUN COUNTY, VA

FAIRFAX COUNTY, VA

HOWARD COUNTY, MD

WASHINGTON, DC

ROCKVILLE

WHEATON

SILVER SPRING

BETHESDA

FRIENDSHIP HEIGHTS

LOUDOUN COUNTY, VA

FAIRFAX COUNTY, VA

HOWARD COUNTY, MD

WASHINGTON, DC

ROCKVILLE

WHEATON

SILVER SPRING

TWINBROOK

WHITE FLINT

BETHESDA

FRIENDSHIP HEIGHTS

Purpose

Traditional Suburban Bicycle Planning

Four Types of Transportation Cyclists

Strong and Fearless (~4%)

Enthused and Confident (~9%)

Interested but Concerned (~56%)

No Way, No How (~31%)

TRADITIONAL

EMERGING

“If or when I ride a bike, I’m concerned about being hit by a motor vehicle”

Source: Jennifer Dill

39% 52% 84%

“Enthused and Confident”

• “Enthused and Confident” group is okay with bike lanes

“Interested but Concerned”

• “Interested by Concerned” group requires buffered bike lanes or cycle tracks on arterial roads

Bicycle Facility Selection Tools

Traditional Facility Assessment

Maryland State Highway Administration

Posted Speed Limit

Truck Volumes %

Shoulder/ Lane Width

≤35 mph 4 feet

>35 mph and ≤45 mph

≤8% trucks 5 feet

>8% trucks

6 feet

>45 mph 6 feet

Traditional Facility Assessment

• Each link is evaluated individually

– Network connectivity not considered and prioritized

– Intersections and transitions not considered

• Limited number of bicycle facilities

– New bicycle facilities and treatments have been developed for different contexts

• One size fits all approach

Innovative Facility Selection Tools

• Account for the different needs of different types of users

• Recognize network connectivity

– Both in matters of facility siting and transitions at intersections or other obstacles

• Additional facility types are included in assessment

Tool #1: Nomographs

Click to edit Master title style

Speed (mph)

CONFIDENT CYCLISTS

<15 20 25 30 35 40 45 50 55+

Physically Separated

Physically Separated Or Bike Lane with Buffer

Wide Bike Lane (Buffer Optional)

Mixed Traffic or Sharrow

Speed (mph)

INTERESTED BUT CONCERNED

<1K <15 20 25 30 35 40 45 50 55+

Wide Bike Lane

(buffer optional)

Wide Bike Lane

(buffer preferred)

or Bike Lane with Buffer

Spring Street (west of Georgia Ave), Silver Spring Speed: 30 mph Volume: 9,700

Maryland-National Capital Park and Planning Commission Maryland-National Capital Park and Planning Commission Speed (mph)

CONFIDENT CYCLISTS 50K

<15 20 25 30 35 40 45 50 55+

Speed (mph)

INTERESTED BUT CONCERNED 10K

<1K <15 20 25 30 35 40 45 50 55+

Physically Separated Physically Separated

Physically Separated Or Bike Lane with Buffer

Wide Bike Lane (Buffer Optional)

Spring Street (west of Georgia Ave), Silver Spring Speed: 30 mph Volume: 9,700

Tool #2: Level of Traffic Stress

Level of Traffic Stress

• Four stress levels based on key facility and traffic factors

– Stress level 1 – Requires little attention, suitable for children

– Stress level 2 – Low traffic stress, but only suitable for most adults

– Stress level 3 – Moderate traffic stress for all bicyclists

– Stress level 4 – High stress, only suitable for experienced bicyclists

Level of Traffic Stress

• Key factors include

– Presence and type of facility

– Width of dedicated bicycle facility

– Number of vehicle lanes

– Vehicle speed and volume

– Density of driveways, intersections, and other conflicts with facility

Bethesda Downtown Plan

Network for the “Strong and Fearless”

Existing Network Planned Network

Network for the “Enthused and Confident”

Network for the “Interested but Concerned”

Benefits of Level of Traffic Stress Compared to Other Metrics

• Incorporates physically separated facilities (shared use paths, cycle tracks)

• Evaluates road segments and intersections based on perceived safety

• Data requirements permit a relatively quick network assessment

• Enables improvements to be prioritized to maximize connectivity for different user groups

• How well you are addressing target population

David Anspacher

Montgomery County Planning Department

(301) 495-2191

david.anspacher@montgomeryplanning.org

www.montgomeryplanning.org/transportation/bikeways/

Settling the Score: Street Performance Measures

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