(1) 
Upon all roadways of sufficient width, a vehicle shall be driven upon the right half of the roadway, except as follows:
(a) 
When overtaking and passing another vehicle proceeding in the same direction under the rules governing such movement;
(b) 
When an 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;
(c) 
Upon a roadway divided into three lanes for traffic under the rules applicable thereon; or
(d) 
Upon a roadway restricted to one-way traffic as indicated by official traffic control devices.
(2) 
Upon all roadways 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 a private road or driveway.
(3) 
Upon any roadway having four 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 such lanes or except as permitted under subsection (1)(b) of this section. However, this subsection (3) does not prohibit the crossing of the center line in making a left turn into or from an alley, private road, or driveway when such movement can be made in safety and without interfering with, impeding, or endangering other traffic lawfully using the highway.
(4) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
Drivers of vehicles proceeding in opposite directions shall pass each other to the right, and, upon roadways having width for not more than one lane of traffic in each direction, each driver shall give to the other at least one-half of the main-traveled portion of the roadway as nearly as possible.
(2) 
A driver shall not pass a bicyclist moving in the same direction and in the same lane when there is oncoming traffic unless the driver can simultaneously:
(a) 
Allow oncoming vehicles at least one-half of the main-traveled portion of the roadway in accordance with subsection (1) of this section; and
(b) 
Allow the bicyclist at least a three-foot separation between the right side of the driver’s vehicle, including all mirrors or other projections, and the left side of the bicyclist at all times.
(3) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
The following rules shall govern the overtaking and passing of vehicles proceeding in the same direction, subject to the limitations, exceptions, and special rules stated in this section and GJMC § 10.04.1004 to 10.04.1008:
(a) 
The driver of a vehicle overtaking another vehicle proceeding in the same direction shall pass to the left of the vehicle at a safe distance and shall not again drive to the right side of the roadway until safely clear of the overtaken vehicle.
(b) 
The driver of a motor vehicle overtaking a bicyclist proceeding in the same direction shall allow the bicyclist at least a three-foot separation between the right side of the driver’s vehicle, including all mirrors or other projections, and the left side of the bicyclist at all times.
(c) 
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 the driver’s vehicle until completely passed by the overtaking vehicle.
(2) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
The driver of a vehicle may overtake and pass upon the right of another vehicle only under the following conditions:
(a) 
When the vehicle overtaken is making or giving indication of making a left turn;
(b) 
Upon a street or highway with unobstructed pavement not occupied by parked vehicles and marked for two or more lanes of moving vehicles in each direction; or
(c) 
Upon a one-way street or upon any roadway on which traffic is restricted to one direction of movement where the roadway is free from obstructions and marked for two or more lanes of moving vehicles.
(1.5) 
The driver of a motor vehicle upon a one-way roadway with two or more marked traffic lanes, when overtaking a bicyclist proceeding in the same direction and riding on the left-hand side of the road, shall allow the bicyclist at least a three-foot separation between the left side of the driver’s vehicle, including all mirrors or other projections, and the right side of the bicyclist at all times.
(2) 
The driver of a vehicle may overtake and pass another vehicle upon the right only under conditions permitting such movement in safety. In no event shall such movement be made by driving off the pavement or main-traveled portion of the roadway.
(3) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
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 authorized by the provisions of this chapter and unless such left side is clearly visible and is free of oncoming traffic for a sufficient distance ahead to permit such overtaking and passing to be completed 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 200 feet of any approaching vehicle.
(2) 
No vehicle shall be driven on the left side of the roadway under the following conditions:
(a) 
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;
(b) 
When approaching within 100 feet of or traversing any intersection or railroad grade crossing; or
(c) 
When the view is obstructed upon approaching within 100 feet of any bridge, viaduct, or tunnel.
(3) 
Reserved.
(4) 
The provisions of this section shall not apply:
(a) 
Upon a one-way roadway;
(b) 
Under the conditions described in GJMC § 10.04.1001(1)(b);
(c) 
To the driver of a vehicle turning left into or from an alley, private road, or driveway when such movement can be made in safety and without interfering with, impeding, or endangering other traffic lawfully using the highway; or
(d) 
To the driver of a vehicle passing a bicyclist moving the same direction and in the same lane when such movement can be made in safety and without interfering with, impeding, or endangering other traffic lawfully using the highway.
(5) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
Upon a roadway restricted to one-way traffic, a vehicle shall be driven only in the direction designated at all or such times as shall be indicated by official traffic control devices.
(2) 
A vehicle passing around a rotary traffic island shall be driven only to the right of such island.
(3) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
Whenever any roadway has been divided into two or more clearly marked lanes for traffic, the following rules in addition to all others consistent with this section shall apply:
(a) 
A vehicle shall be driven as nearly as practicable entirely within a single lane and shall not be moved from such lane until the driver has first ascertained that such movement can be made with safety.
(b) 
Upon a roadway which is divided into three lanes and provides for two-way movement of traffic, a vehicle shall not be driven in the center lane except when overtaking and passing another vehicle traveling in the same direction where the roadway is clearly visible and such center lane is clear of traffic within a safe distance, or in preparation for a left turn, or where such center lane is at the time allocated exclusively to the traffic moving in the direction the vehicle is proceeding and is designated by official traffic control devices to give notice of such allocation. Under no condition shall an attempt be made to pass upon the shoulder or any portion of the roadway remaining to the right of the indicated right-hand traffic lane.
(c) 
Official traffic control devices may be erected directing specified traffic to use a designated lane or designating those lanes to be used by traffic moving in a particular direction regardless of the center of the roadway, and drivers of vehicles shall obey the directions of every such device.
(d) 
Official traffic control devices may be installed prohibiting the changing of lanes on sections of roadway, and drivers of vehicles shall obey the directions of every such device.
(2) 
The City may designate with signage an area on a roadway not otherwise laned for traffic for use by commercial vehicles, as defined in GJMC § 10.04.235(1)(a), that are designed to transport 16 or more passengers, including the driver, and that are operated by a governmental entity or government-owned business that transports the general public or by a contractor on behalf of such an entity or government-owned business. Use of such an area is limited to vehicles authorized by the City operating under conditions of use established by the Department but, subject to the conditions of use, the driver of an authorized vehicle has sole discretion to decide whether or not to drive on such an area based on the driver’s assessment of the safety of doing so. The City shall impose and each authorized user shall acknowledge the conditions of use by written agreement, and the City need not note the conditions of use in roadway signage. An authorized user does not violate this section or GJMC § 10.04.1004 when operating in accordance with the conditions of use for an area imposed by the Department and acknowledged by the user in a written agreement.
(3) 
A person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
The driver of a motor vehicle shall not follow another vehicle more closely than is reasonable and prudent, having due regard for the speed of such vehicles and the traffic upon and the condition of the highway.
(2) 
The driver of any motor truck or motor vehicle drawing another vehicle when traveling upon a roadway outside of a business or residence district and which is following another motor truck or motor vehicle drawing another vehicle shall, whenever conditions permit, leave sufficient space so that an overtaking vehicle may enter and occupy such space without danger; except that this shall not prevent a motor truck or motor vehicle drawing another vehicle from overtaking and passing any like vehicle or other vehicle.
(3) 
Motor vehicles being driven upon any roadway outside of a business or residence district in a caravan or motorcade, whether or not towing other vehicles, shall be so operated as to allow sufficient space between each such vehicle or combination of vehicles so as to enable any other vehicle to enter and occupy such space without danger. This provision shall not apply to funeral processions.
(4) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
The driver of a motor vehicle shall not, in a careless and imprudent manner, drive the vehicle unnecessarily close to, toward, or near a bicyclist.
(2) 
Any person who violates subsection (1) of this section commits careless driving as described in GJMC § 10.04.1402.
(Ord. 4759, 9-6-17)
(1) 
The driver of any motor vehicle when traveling upon a downgrade shall not coast with the gears or transmission of such vehicle in neutral.
(2) 
The driver of a truck or bus when traveling upon a downgrade shall not coast with the clutch disengaged.
(3) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(1) 
Whenever any highway has been divided into separate roadways by leaving an intervening space or by a physical barrier or clearly indicated dividing section so constructed as to impede vehicular traffic, every vehicle shall be driven only upon the right-hand roadway, unless directed or permitted to use another roadway by official traffic control devices. No vehicle shall be driven over, across, or within any such dividing space, barrier, or section, except through an opening in such physical barrier or dividing section or space or at a crossover or intersection as established, unless specifically prohibited by official signs and markings or by the provisions of GJMC § 10.04.902. However, this subsection (1) does not prohibit a left turn across a median island formed by standard pavement markings or other mountable or traversable devices as prescribed in the State traffic control manual when such movement can be made in safety and without interfering with, impeding, or endangering other traffic lawfully using the highway.
(2) 
(a) 
No person shall drive a vehicle onto or from any controlled-access roadway except at such entrances and exits as are established by public authority.
(b) 
Wherever an acceleration lane has been provided in conjunction with a ramp entering a controlled-access highway and the ramp intersection is not designated or signed as a stop or yield intersection as provided in GJMC § 10.04.703(1), drivers may use the acceleration lane to attain a safe speed for merging with through traffic when conditions permit such acceleration with safety. Traffic so merging shall be subject to the rule governing the changing of lanes as set forth in GJMC § 10.04.1007(1)(a).
(c) 
Wherever a deceleration lane has been provided in conjunction with a ramp leaving a controlled-access highway, drivers shall use such lane to slow to a safe speed for making an exit turn after leaving the mainstream of faster-moving traffic.
(3) 
The City may, consistent with the provisions of § 43-2-135(1)(g), C.R.S., with respect to any controlled-access highway within the City limits, prohibit the use of any such highway by any class or kind of traffic which is found to be incompatible with the normal and safe movement of traffic. The City shall install official traffic control devices in conformity with the standards established by §§  42-4-601 and 42-4-602, C.R.S., at entrance points or along the highway on which such regulations are applicable. When such devices are so in place, giving notice thereof, no person shall disobey the restrictions made known by such devices. This subsection (3) shall not be construed to regulate pedestrian use of highways in a manner contrary to the provisions of GJMC § 10.04.805.
(4) 
Any person who violates any provision of this section commits a traffic infraction.
(Ord. 4759, 9-6-17)
(Ord. 4759, 9-6-17)
(Ord. 4759, 9-6-17)
(1) 
A person shall not drive a motor vehicle in the passing lane of a highway if the speed limit is 65 miles per hour or more unless such person is passing other motor vehicles that are in a nonpassing lane or turning left, or unless the volume of traffic does not permit the motor vehicle to safely merge into a nonpassing lane.
(2) 
For the purposes of this section:
“Nonpassing lane”
means any lane that is to the right of the passing lane if there are two or more adjacent lanes of traffic moving in the same direction in one roadway.
“Passing lane”
means the farthest to the left lane if there are two or more adjacent lanes of traffic moving in the same direction in one roadway; except that, if such left lane is restricted to high occupancy vehicle use or is designed for left turns only, the passing lane shall be the lane immediately to the right of such high occupancy lane or left-turn lane.
(3) 
A person who violates this section commits a traffic infraction.
(Ord. 4759, 9-6-17)