Eric Westhagen asked  <it was stated or implied that there is already a law 
that motor vehicles must maintain a space of three feet between themselves and 
bicycles.  Is this true?>

Yes, and bicyclists must also leave three feet of clearance when passing a 
moving, standing, or parked vehicle.  See below.

Wisconsin State Statutes are online at 
http://www.legis.state.wi.us/rsb/Statutes.html

The chapters of greatest relevance are 
340 - - Vehicles General Provisions (definitions of terms used in other 
chapters related to vehicles)
346 - - Rules of the Road
347 - - Equipment of Vehicles
349 - - Vehicles - - Powers of State and Local Authorities

346.075 Overtaking and passing bicycles, electric personal assistive mobility 
devices, and motor buses.
(1) The operator of a motor vehicle overtaking a bicycle or electric personal 
assistive mobility device proceeding in the same
direction shall exercise due care, leaving a safe distance, but in no case less 
than 3 feet clearance when passing the bicycle or electric personal assistive 
mobility device, and shall maintain clearance until safely past the overtaken 
bicycle or electric personal assistive mobility device.

346.80 Riding bicycle or electric personal assistive mobility device on 
roadway. 
(1) In this section, “substandard width lane” means a lane that is too narrow 
for a bicycle or electric personal assistive mobility device and a motor 
vehicle to travel safely side by side within the lane.
(2) (a) Any person operating a bicycle or electric personal assistive mobility 
device upon a roadway at less than the normal speed of traffic at the time and 
place and under the conditions then existing shall ride as close as practicable 
to the right−hand edge or curb of the unobstructed traveled roadway, including 
operators who are riding 2 or more abreast where permitted under sub. (3),
except:
     1. When overtaking and passing another vehicle proceeding in the same 
direction.
     2. When preparing for a left turn at an intersection or into a private 
road or driveway.
     3. When reasonably necessary to avoid unsafe conditions, including fixed 
or moving objects, parked or moving vehicles, pedestrians, animals, surface 
hazards or substandard width lanes that make it unsafe to ride along the 
right−hand edge or curb.
(b) Notwithstanding par. (a), any person operating a bicycle or electric 
personal assistive mobility device upon a one−way highway
having 2 or more lanes available for traffic may ride as near the left−hand 
edge or curb of the roadway as practicable.
(c) Any person operating a bicycle or electric personal assistive mobility 
device upon a roadway shall exercise due care when
passing a standing or parked vehicle or a vehicle proceeding in the same 
direction, allowing a minimum of 3 feet between the bicycle
or electric personal assistive mobility device and the vehicle, and shall give 
an audible signal when passing a bicycle or electric personal assistive 
mobility device rider proceeding in the same direction.
(3) (a) Persons riding bicycles or electric personal assistive mobility devices 
upon a roadway may ride 2 abreast if such operation
does not impede the normal and reasonable movement of traffic. Bicycle or 
electric personal assistive mobility device operators
riding 2 abreast on a 2−lane or more roadway shall ride within a single lane.
(b) Persons riding bicycles upon a roadway may not ride more than 2 abreast 
except upon any path, trail, lane or other way set
aside for the exclusive use of bicycles and electric personal assistive 
mobility devices.



Arthur Ross, Pedestrian-Bicycle Coordinator
City of Madison Traffic Engineering Division
215 Martin Luther King Jr. Blvd, Suite 100
PO Box 2986
Madison, WI  53701-2986
608/266-6225
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