N SYCAMORE ST Complete Street Design - VASITE · 2017. 11. 30. · Source: NACTO Urban Street...
37
v Chris Tiesler, PE 2016 VASITE Annual Meeting | June 30, 2016 N SYCAMORE ST Complete Street Design PROTECTED INTERSECTION DESIGN
Transcript of N SYCAMORE ST Complete Street Design - VASITE · 2017. 11. 30. · Source: NACTO Urban Street...
v
Chris Tiesler, PE
2016 VASITE Annual Meeting | June 30, 2016
N SYCAMORE ST Complete Street Design
PROTECTED INTERSECTION DESIGN
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
REGIONAL PROJECT AREA
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
PROJECT AREA
Transform a suburban-type arterial street into a safer and more inviting facility for pedestrians and bicyclists to access a Metro station.
Show how jurisdictions in the region can adapt to changes in the Metro system.
Provide examples of how to address conflicts between different users (cyclists, pedestrians, and drivers) at an expressway interchange.
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
PROJECT GOALS
Self-enforcing roadway design
Balanced operations for ALL users
A low stress, safe, and convenient experience for bicyclists and pedestrians
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
GUIDING PRINCIPLES
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
2011 AREA PLAN
Concentration of multiple modes• Bus/Metro Rail• Pedestrians• Bicyclists• Vehicles
Right-of-Way Constraints
Multiple stakeholders with disparate goals• Arlington County• WMATA• VDOT
Concurrent overlapping projects• WMATA Bus Loop
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
CHALLENGES
Let the traffic conditions work for you
Forward-thinking client that looks to innovate
Apply experience gained through research and involvement in development of emerging best practices• NACTO• FHWA Separated Bike Lane Planning and
Design Guide
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
OPPORTUNITIES
Synchro / SimTraffic
Quantitative performance measures• Capacity• Travel time through corridor• Delay
Field Observations / Calibration
Signal Timing / Phasing
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
VEHICULAR OPERATIONS
MMLOS falls short when considering protected bike treatments• Danish LOS as a
proxy• Bicycle Level of
Traffic Stress
Blend of qualitative & quantitative performance measures
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
NON-MOTORIZED OPERATIONS
Use initial operational results and data to brainstorm ideas
Intuition is just as valuable
Get creative within the public R/W to re-imagine the space
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
CONCEPTUAL DEVELOPMENT
Source: NACTO Urban Street Design Guide
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGNNeighborhood Main Street
“…a nexus of neighborhood life, with high pedestrianvolumes, frequent parking turnover, key transit routes, and bicyclists all vying for limited space.”
Source: NACTO Urban Street Design Guide
Better Defined User Space
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGNNeighborhood Main Street
Source: NACTO Urban Street Design Guide
Shorter Crossing Distances
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGN
Better Defined User Space
Neighborhood Main Street
Source: NACTO Urban Street Design Guide
SHORTER CROSSING DISTANCES
Increased Buffer Space
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGN
Shorter Crossing Distances
Better Defined User Space
Neighborhood Main Street
Source: NACTO Urban Street Design Guide
SHORTER CROSSING DISTANCES
Increased Buffer Space
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGN
Shorter Crossing Distances
Better Defined User Space
Neighborhood Main Street
Road Diet
Photo Credit: Dan Burden
Corner refuge island that physically separates bicyclists and pedestrians while providing a secure waiting area at a signal, protected from traffic.
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGN
Photo Credit: NACTO
Forward stop bar for bicyclists and pedestrians that increases visibility to drivers, gives a head start and decreases the distance to cross the roadway.
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGN
Photo Credit: People for Bikes
Setback crossing
location, similar to a
roundabout. By
bending the protected
bike lane and sidewalk
away from the
intersection, space and
time is provided for
users to recognize and
react to each other.
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
SELF-ENFORCING ROADWAY DESIGN
Source: NACTO Urban Street Design Guide
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
MAJOR INTERSECTIONS
Large intersections difficult for pedestrians and bicyclists to manage Channelized right turns
and other features create unsafe, higher speed turns
Source: NACTO Urban Street Design Guide
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
MAJOR INTERSECTIONS
Leading pedestrian interval
Fully protected bike lane and bike signals (if feasible)
PHASE 1: Pedestrians Only
Pedestrians are given a minimum 3-7 second head start entering the intersection.
PHASE 2: Pedestrians and Cars
Through and turning traffic are given the green light. Turning traffic yields to pedestrians already in the crosswalk.
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
LEADING PEDESTRIAN (OR BIKE) INTERVAL (LPI)
DISCUSS CONTENT
Prioritize Pedestrians/Bicyclists through Signal Timing Strategies
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED
NORTH
DISCUSS CONTENT
Protected Left Turn Phasing Protects Pedestrians and
Improves Operations
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED
NORTH
DISCUSS CONTENT
Protected Only Right Turn Eliminates Pedestrian/Bike
Conflicts
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED
NORTH
DISCUSS CONTENT
Head Start for Pedestrians/Bikes Using LPI
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED
NORTH
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Protected Intersection
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Road Diet
10,000 ADT
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Road Diet
10,000 ADT
20,000 ADT
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Road Diet
10,000 ADT
Low Turning Volume• 9 AM• 15 PM
20,000 ADT
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Road Diet
10,000 ADT
Lane Imbalance
Low Turning Volume• 9 AM• 15 PM
20,000 ADT
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Road Diet
Road Diet
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Road Diet
Road Diet
Re-Purpose Space• Protected Bike
Lane• Combined
through/right movements
Vertical speed control elements enhance safety/visibility of
pedestrians and bicyclists and manage traffic speeds.
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
STRATEGIES EMPLOYED – Corner Treatment
Balances an Improved Pedestrian/Bicycle Safety/Performance with Vehicular Operations Throughout the Corridor
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
BALANCED OPERATIONS
Don’t hide the skunk!• Be clear about trade-offs
and unknowns
Solid 30% Design Plans• Thorough vetting of
design now streamlines future process and avoids fatal flaws
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
RESULTS
ANY QUESTIONS?
N S ycamore Compl et e S t reet Design | P rot ect ed In t ersect ion Design
