31-5-921(h).

31-5-921(h).  (c) Off-road recreational vehicles shall not be operated on the roadway or right-of-way of an interstate highway except in accordance with W.S. 31-5-1601(e).

ARTICLE 2 - OPERATION OF VEHICLES GENERALLY

31-5-201. Driving on right side of roadway; exceptions.

(a) Upon all roadways of sufficient width a vehicle shall be driven upon the right half of the roadway, except for any of the following:

(i) When overtaking and passing another vehicle proceeding in the same direction under the rules governing the movement;

(ii) When a stationary obstruction exists making it necessary to drive to the left of the center of the highway but any person so doing shall yield the right-of-way to all vehicles traveling in the proper direction upon the unobstructed portion of the highway within such distance as to constitute an immediate hazard;

(iii) Upon a roadway divided into three (3) marked lanes for traffic under the rules applicable thereon;

(iv) Upon a roadway designated and signposted for one-way traffic;

(v) Upon a roadway designated and signposted as a high occupancy vehicle lane.

(b) Upon all roadways except one-way streets any vehicle proceeding at less than the normal speed of traffic at the time and place and under the conditions then existing shall be driven in the right-hand lane then available for traffic, or as close as practicable to the right-hand curb or edge of the roadway, except when overtaking and passing another vehicle proceeding in the same direction or when preparing for a left turn at an intersection or into an alley, private road or driveway.

(c) Upon any roadway having four (4) or more lanes for moving traffic and providing for two-way movement of traffic, no vehicle shall be driven to the left of the center line of the roadway except when authorized by official traffic-control devices designating certain lanes to the left side of the center of the roadway for use by traffic not otherwise permitted to use the lanes, or except as permitted under paragraph (a)(ii) of this section. This subsection does not prohibit the crossing of the center line in making a left turn into or from an alley, private road or driveway.

31-5-202. Passing of vehicle approaching from opposite direction.

Drivers of vehicles proceeding in opposite directions shall pass each other to the right and upon roadways having width for not more than one (1) line of traffic in each direction each driver shall give to the other at least one-half (1/2) of the main-traveled portion of the roadway as nearly as possible.

31-5-203. Rules governing overtaking on the left.

(a) The following rules shall govern the overtaking and passing of vehicles proceeding in the same direction, subject to those limitations, exceptions and special rules hereinafter stated and those contained in subsection (c) of this section:

(i) The driver of a vehicle overtaking another vehicle proceeding in the same direction shall pass to the left thereof at a safe distance and shall not again drive to the right side of the roadway until safely clear of the overtaken vehicle;

(ii) Except when overtaking and passing on the right is permitted, the driver of an overtaken vehicle shall give way to the right in favor of the overtaking vehicle on audible signal and shall not increase the speed of his vehicle until completely passed by the overtaking vehicle.

(b) A driver of a passenger car, motorcycle, autocycle or pickup truck, not towing any other vehicle, may exceed the speed limit by up to ten (10) miles an hour while passing another vehicle traveling at less than the legal maximum speed, in order to safely pass the vehicle. The overtaking vehicle shall return to the right-hand lane and reduce speed to the posted speed limit as soon as practicable. This subsection shall be applicable only upon roadways divided into two (2) lanes for two (2) way movement of traffic and where the posted speed limit is fifty (50) miles per hour or greater. This subsection shall not be applicable in construction zones. Passing a vehicle pursuant to this subsection shall be subject to all other applicable motor vehicle laws. A driver of a vehicle exceeding the ten (10) mile per hour limitation of this subsection shall be subject to the full penalty or penalties applicable to exceeding the posted speed limit by the actual speed of the vehicle. As used in this section, "motorcycle," "passenger car," "pickup," "autocycle" and "vehicle" mean as defined in W.S. 31-1-101.

(c) The driver of a motor vehicle overtaking and passing a bicycle or electric bicycle, which is operating lawfully, proceeding in the same direction shall, when space allows, maintain at least a three (3) foot separation between the right side of the driver's motor vehicle, including all mirrors and other projections from the motor vehicle, and the bicycle or electric bicycle.

31-5-204. General limitations on overtaking on the left.

No vehicle shall be driven to the left side of the center of the roadway in overtaking and passing another vehicle proceeding in the same direction unless the left side is clearly visible and is free of oncoming traffic for a sufficient distance ahead to permit the overtaking and passing to be completely made without interfering with the operation of any vehicle approaching from the opposite direction or any vehicle overtaken. In every event the overtaking vehicle must return to an authorized lane of travel as soon as practicable and in the event the passing movement involves the use of a lane authorized for vehicles approaching from the opposite direction, before coming within two hundred (200) feet of any approaching vehicle.

31-5-205. Additional limitations on driving on the left; exceptions.

(a) No vehicle shall be driven on the left side of the roadway under the following conditions:

(i) When approaching or upon the crest of a grade or a curve in the highway where the driver's view is obstructed within such distance as to create a hazard in the event another vehicle might approach from the opposite direction;

(ii) When approaching within one hundred (100) feet of or traversing any intersection or railroad grade crossing unless otherwise indicated by official traffic-control devices;

(iii) When the view is obstructed upon approaching within one hundred (100) feet of any bridge, viaduct or tunnel.

(b) Subsection (a) of this section does not apply:  (i) Upon a one-way roadway;

(ii) Under the conditions described in W.S.