Commonway
Version V. 2026.08.31

Street Tree

ELM-STT-28
Recommended Element

Street Tree

A tree planted along a street, typically within the sidewalk zone or a landscaped buffer, providing shade, stormwater interception, visual buffering from traffic, and streetscape character.

Working assessment: this pattern’s status reflects a preliminary Commonway System judgment call, pending final review.

#Why this pattern exists

Street trees do measurable work beyond aesthetics, they reduce pedestrian-level heat, intercept a portion of rainfall before it reaches the storm system, and provide a visual and physical buffer between pedestrians and moving traffic; this pattern exists to document species selection, spacing, and root-space considerations that determine whether a tree thrives or struggles in a street environment.

#Key considerations

  • Adequate below-grade root space and soil volume must be planned for at installation; insufficient space is the leading cause of poor street tree survival and growth
  • Species selection should account for mature canopy size relative to available overhead and sidewalk clearance, utility conflicts, and local climate tolerance
  • Spacing should balance canopy coverage goals against sightline requirements at driveways, crossings, and intersections

Tree Pit/Tree Trench (ELM-TPT-29) (the below-grade element supporting this pattern); Landscaped Buffer Strip (ELM-LBS-30) (a common zone this pattern is planted within)

Unsourced claim

Formal citations for this pattern have not yet been compiled from primary sources.

Suggest changes to this page (opens in new tab) Last updated August 31, 2026