Bicycles

The Bicycles May Use Full Lane sign, also referred to as BMUFL or R4-11, is a traffic sign used in the United States to: designate roads with lanes that are too narrow to be safely shared side-by-side by a bicycle and another vehicle to indicate that bicyclists may occupy the full lane to discourage unsafe within-lane passing encourage bicyclists to use the full lane to discourage unsafe within-lane passing encourage motorists to change lanes to pass bicyclists warn motorists that bicyclists may be using the full lane The sign consists of a graphic image of a bicycle, followed by the words, "May Use Full Lane". BMUFL was first specified in Chapter 9B of the 2009 Manual on Uniform Traffic Control Devices, and was replaced with the Bicycles Allowed Use of Full Lane sign (R9-20) in the 11th Edition in 2023.