[Jump directly below to Usable Width for roads without bike lanes]
[Jump directly below to Guadalupe Rd resurfacing example]
[Jump directly below to some engineering details of gutter pans]
Usable Width of a Bike Lane

The dimension below all refer to urban streets with curbs and no parking… Most recommendations for Bike Lane dimensions refer to the AASHTO Guide for the Development of Bicycle Facilities , the general rule is
the minimum bike lane width is 5 ft (1.5 m), measured from the face of a curb or vertical surface to the center of the bike lane line
However, that changes when a gutter pan is involved, more width is required to meet their recommendations —
Along sections of roadway with curb and gutter, a usable width of 4 ft (1.2 m) measured from the longitudinal joint to the center of the bike lane line is recommended




