I'm sorry I pasted the wrong Ordinance. The one that should apply is this one:

Sec. 11:60. - 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 as follows: (1) When overtaking and passing another vehicle proceeding in the same direction under the rules governing such movement, including passing lanes; (2) When the right half of a roadway is closed to traffic while under construction or repair; (3) Upon a roadway designated and signposted for one-way traffic. B. (1)(a) Upon all multilane highways, no vehicle shall be driven in the left hand lane except when directed otherwise, preparing for a left turn at an intersection or private road or driveway, overtaking or passing another vehicle proceeding in the same direction, or when right-hand lanes are congested; however, no vehicle being driven in the left lane except when directed otherwise or preparing for a left turn at an intersection, private road, or driveway shall impede any other vehicle that is traveling in the same lane and behind that vehicle. (b) Upon all multilane highways, no vehicle traveling in the left-hand lane shall be driven at a speed slower than any vehicle traveling to its right on the same roadway. (c) Upon all multilane highways any vehicle proceeding at less than the normal speed of traffic at the time and place and under the circumstances then existing, shall be driven in the right-hand lane then available for traffic except when preparing for a left turn at an intersection or into a private road or driveway, or passing or overtaking a vehicle proceeding in the same direction, if passing on the left side of it. Nothing herein contained shall be construed to authorize driving any vehicle in the left lane so as to prohibit, impede, or block passage of an overtaking vehicle in such lane and in such event the vehicle in the left lane prohibiting, impeding, or blocking passage of an overtaking vehicle shall expeditiously merge into the right lane of traffic. (d) The provisions of this subsection shall not apply during a declared state of emergency when contraflow has been activated. (e) 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. (f) Upon any roadway having four (4) or more lanes for moving traffic and providing for two (2) 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 (a)(2) hereof. However, this subsection shall not be construed as prohibiting the crossing of the center line in making a left turn into or from an alley, private road or driveway. (2) In addition to the requirement of paragraph (1) hereof, any vehicle proceeding on a multilane highway at a speed slower than ten (10) miles per hour less than the posted maximum speed limit 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 a vehicle proceeding in the same direction or when preparing for a left turn at an intersection or into a private road or driveway. Persons in violation of this Paragraph shall be punished by a fine of not more than one hundred dollars ($100.00), or by imprisonment for not more than thirty (30) days, or both. (City Code 1951, Title 11, § 60; Ord. No. 14792, § 1, 10-14-09)

State Law reference— Similar provisions, R.S. 32:71.