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3.6 Roadways

3.6B Lane widths

Image showing lanes

Figure 3.6B.1:
Lane widths for all Street Types other than Urban Neighborhood

Roadway element Recommended width 

Travel lanes

10’1

Turn-only lanes

10’2

Bus-only lanes

11’ or 10’ if adjacent to 2’ gutter3

Medians

6’+4

Gutter pans

2’5  or 1’ if adjacent to a median

Parking lane and other curbside uses

8’6  (includes 2’ gutter)

Bus stop pull out

8’7  (includes 2’ gutter)
  1. For streets with high-frequency bus service or heavy semitruck volumes, one travel lane of 11’ in each direction may be considered. Curb adjacent traffic lanes should not be wider than 10’ given the adjacent gutter pan.
  2. For turn lanes with heavy bus or heavy truck volumes, 11’ may be considered. 
  3. For contraflow bus lanes, 11’ lanes should be used even if adjacent to a 2’ gutter.
  4. 4’ medians can be considered in constrained right of way.
  5. For streets with constrained right of way, designers can consider 1’ gutter pans or an integral 11’ wide concrete lane. Flooding concerns may make narrower gutter pans infeasible; coordinate with Surface Water and Sewers.
  6. 7’ wide parking lanes should be considered in residential areas with constrained right of way. In some industrial areas, 9’ wide parking lanes may be considered.
  7. In constrained right of way, 7’ wide bus stop pull outs may be considered.

Figure 3.6B.2:
Roadway widths for Urban Neighborhood streets

Configuration Recommended width, including gutters

Street with parking on both sides

30’8

Two-way street with parking on one side

24’8

Two-way street with no parking

18’-20’

One-way street with parking on one side

18’-20’

8. For streets with higher than 75% average parking utilization, see design guidance for Urban Neighborhood streets with high parking demand.