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Committee of the Whole/Documents/Watkiss Way at Erskine Lane Roundabout Design Solution (Presentation)
Presentation

Watkiss Way at Erskine Lane Roundabout Design Solution (Presentation)

November 9, 2021Pages 414–4239 sections

A presentation comparing the proposed roundabout design against a traffic signal and detailing pedestrian connectivity solutions.

November 9, 2021Approximately 10 – 20 daily trips impactedDesigned in accordance with TAC Canadian Roundabout Design Guide

Watkiss Way at Erskine Lane

Roundabout Design Solution

November 9th, 2021 Committee of the Whole Meeting

Aerial view of the Watkiss Way and Erskine Lane intersection area.
Aerial view of the Watkiss Way and Erskine Lane intersection area.
Page 414–423

Purpose and Context

  • Roundabout is designed in accordance with TAC Canadian Roundabout Design Guide.
  • Design considers pedestrian flow paths and impacts adjacent properties.
  • Pre-existing site constraints have resulted in some non-standard design elements.
  • Demonstrate that a roundabout is still preferred over traffic signal.
Engineering design plan for the proposed roundabout at Watkiss Way and Erskine Lane.
Engineering design plan for the proposed roundabout at Watkiss Way and Erskine Lane.
Page 414–423

Roundabout vs. Traffic Signal at Watkiss Way and Erskine Lane

Category Roundabout Traffic Signal
Pedestrian safety Satisfactory Satisfactory
Pedestrian connectivity Poor: Narrow ROW on Stoneridge and driveway conflicts on Erskine result in non-standard crosswalk configuration. Satisfactory
Driver/cyclist safety Satisfactory Poor: Higher vehicle speeds result in higher risk of injury or death should an accident occur.
Vehicle delay Satisfactory Poor: Increased average delays for all vehicle approaches.
Operations and maintenance costs Satisfactory Poor: Higher cost to operate and maintain traffic signal infrastructure.
Page 414–423

Pedestrian Connectivity Challenges

  1. ROW on Stoneridge Drive too narrow for crosswalk
  2. Driveway conflict on Erskine Lane unsafe for crosswalk
Roundabout design plan highlighting constraints including narrow right-of-way (ROW) for a crosswalk at Stoneridge Drive and an unsafe driveway conflict area on Erskine Lane.
Roundabout design plan highlighting constraints including narrow right-of-way (ROW) for a crosswalk at Stoneridge Drive and an unsafe driveway conflict area on Erskine Lane.
Page 414–423

Solutions

1. ROW on Stoneridge Drive too narrow for crosswalk

  • Improve existing pathway to the north between Watkiss and Stoneridge.
  • Provide informal pathway to accommodate desire line.
  • Provide sidewalk into Stoneridge subdivision on one side.

2. Driveway conflicts on Erskine Lane

  • Offset crosswalk on Erskine Lane to eliminate conflict.
  • Supported through Origin & Destination (O&D) study.
Roundabout design plan illustrating proposed solutions: improving the pathway between Watkiss and Stoneridge, adding a new informal pathway and sidewalk into Stoneridge, and implementing an offset crosswalk on Erskine Lane.
Roundabout design plan illustrating proposed solutions: improving the pathway between Watkiss and Stoneridge, adding a new informal pathway and sidewalk into Stoneridge, and implementing an offset crosswalk on Erskine Lane.
Page 414–423

Pedestrian Origin / Destination Analysis

Pedestrian Origin / Destination map showing residential unit origins and green routes leading to local destinations like bus stops, schools, and hospitals.
Pedestrian Origin / Destination map showing residential unit origins and green routes leading to local destinations like bus stops, schools, and hospitals.

Legend

  • Origin: Blue shaded areas
  • Route: Green arrows
  • Roundabout: Green circle
  • Bus stop: Bus icon

Destinations

  1. Watkiss Bus Stops
  2. Eagle View School
  3. Victoria General Hospital
  4. GG Regional Trail
  5. Eagle Creek Shopping

Impact Summary

Pedestrians traveling to and from the bus stops on Watkiss at Erskine and Stoneridge from the ~100 units west and north of the roundabout may be inconvenienced by the non-standard crosswalk location. Approximately 10 – 20 daily trips impacted.

Page 414–423

Pedestrian Travel Options

  1. Use pathway to Watkiss Way through Stoneridge subdivision.
  2. Use non-formalized crossing at Stoneridge Drive.
  3. Use Erskine Lane crosswalk (most accessibly-friendly).
Page 414–423

Roundabout vs. Traffic Signal at Watkiss Way and Erskine Lane (Updated)

Category Roundabout Traffic Signal
Pedestrian safety Satisfactory Satisfactory
Pedestrian connectivity Satisfactory (with offset crosswalk solution) Satisfactory
Driver/cyclist safety Satisfactory Poor: Higher vehicle speeds result in higher risk of injury or death should an accident occur.
Vehicle delay Satisfactory Poor: Increased average delays for all vehicle approaches.
Operations and maintenance costs Satisfactory Poor: Higher cost to operate and maintain traffic signal infrastructure.

SOLUTION: Offset crosswalk on Erskine Lane supported through pedestrian Origin & Destination (O&D) analysis.

Page 414–423

Conclusions

  • Roundabout is designed in accordance with TAC Canadian Roundabout Design Guide.
  • Design considers pedestrian flow paths and impacts to adjacent properties.
  • Pre-existing site constraints have resulted in some non-standard design elements.
  • Demonstrated that a roundabout is still preferred over traffic signal.
Page 414–423

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Extracted from: 2021 11 09 Committee of the Whole Agenda - Agenda - Pdf