Mo. Rev. Stat. » Chapter 304
Missouri Revised Statutes

Mo. Rev. Stat. § 304.015 (2026)

Drive on right of highway

✓ current as of May 2026
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  304.015.  Drive on right of highway — traffic lanes — signs — violations, penalties. — 1.  All vehicles not in motion shall be placed with their right side as near the right-hand side of the highway as practicable, except on streets of municipalities where vehicles are obliged to move in one direction only or parking of motor vehicles is regulated by ordinance.

  2.  Upon all public roads or highways 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 pursuant to the rules governing such movement;

  (2)  When placing a vehicle in position for and when such vehicle is lawfully making a left turn in compliance with the provisions of sections 304.014 to 304.025 or traffic regulations thereunder or of municipalities;

  (3)  When the right half of a roadway is closed to traffic while under construction or repair;

  (4)  Upon a roadway designated by local ordinance as a one-way street and marked or signed for one-way traffic.

  3.  It is unlawful to drive any vehicle upon any highway or road which has been divided into two or more roadways by means of a physical barrier or by means of a dividing section or delineated by curbs, lines or other markings on the roadway, except to the right of such barrier or dividing section, or to make any left turn or semicircular or U-turn on any such divided highway, except at an intersection or interchange or at any signed location designated by the state highways and transportation commission or the department of transportation.  The provisions of this subsection shall not apply to emergency vehicles, law enforcement vehicles or to vehicles owned by the commission or the department.

  4.  The authorities in charge of any highway or the state highway patrol may erect signs temporarily designating lanes to be used by traffic moving in a particular direction, regardless of the center line of the highway, and all members of the Missouri highway patrol and other peace officers may direct traffic in conformance with such signs.  When authorized signs have been erected designating off-center traffic lanes, no person shall disobey the instructions given by such signs.

  5.  Whenever any roadway has been divided into three or more clearly marked lanes for traffic, the following rules in addition to all others consistent herewith shall apply:

  (1)  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;

  (2)  Upon a roadway which is divided into three lanes a vehicle shall not be driven in the center lane, except when overtaking and passing another vehicle where the roadway ahead 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 traffic moving in the direction the vehicle is proceeding and is sign-posted to give notice of such allocation;

  (3)  Upon all highways any vehicle proceeding at less than the normal speed of traffic thereon shall be driven in the right-hand lane for traffic or as close as practicable to the right-hand edge or curb, except as otherwise provided in sections 304.014 to 304.025;

  (4)  Official signs may be erected by the highways and transportation commission or the highway patrol may place temporary signs directing slow-moving traffic to use a designated lane or allocating specified lanes to traffic moving in the same direction and drivers of vehicles shall obey the directions of every such sign;

  (5)  Drivers of vehicles proceeding in opposite directions shall pass each other to the right, and except when a roadway has been divided into traffic lanes, each driver shall give to the other at least one-half of the main traveled portion of the roadway whenever possible.

  6.  All vehicles in motion upon a highway having two or more lanes of traffic proceeding in the same direction shall be driven in the right-hand lane except when overtaking and passing another vehicle or when preparing to make a proper left turn or when otherwise directed by traffic markings, signs or signals.

  7.  All trucks registered for a gross weight of more than forty-eight thousand pounds shall not be driven in the far left-hand lane upon all interstate highways, freeways, or expressways within urbanized areas of the state having three or more lanes of traffic proceeding in the same direction.  This restriction shall not apply when:

  (1)  It is necessary for the operator of the truck to follow traffic control devices that direct use of a lane other than the right lane; or

  (2)  The right half of a roadway is closed to traffic while under construction or repair.

  8.  As used in subsection 7 of this section, "truck" means any vehicle, machine, tractor, trailer, or semitrailer, or any combination thereof, propelled or drawn by mechanical power and designed for or used in the transportation of property upon the highways.  The term "truck" also includes a commercial motor vehicle as defined in section 301.010.

  9.  Violation of this section shall be deemed a class C misdemeanor unless such violation causes an immediate threat of an accident, in which case such violation shall be deemed a class B misdemeanor, or unless an accident results from such violation, in which case such violation shall be deemed a class A misdemeanor.

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(L. 1953 p. 587 § 304.020, A.L. 1971 H.B. 110, A.L. 1996 H.B. 1047, A.L. 2001 S.B. 244, A.L. 2008 S.B. 930 & 947, A.L. 2010 H.B. 1540)

(1960) Under the 1953 statute a motorist is not required to operate his automobile "as close to the right hand side of the highway as is practicable". Lewis v. Nelson, 277 F.2d 207.

(1961) Where motor vehicle skidded on icy pavement and stopped blocking part of highway on grade below crest of hill, operator properly engaged in moving the vehicle rather than going to top of hill to warn other motorists since her car could be seen for a distance of 325 feet. Eastman v. Brackman (Mo.), 347 S.W.2d 126.

(1965) Unexplained skidding of a vehicle into left half of roadway is not ipso facto negligence. It leaves open the question of negligence. Wray v. King (A.), 385 S.W.2d 831.

(1965) This section does not require vehicle to make use of part of road which is in fact impassable and unavailable for travel, and motorist may be excused from statutory violation where he deviates from prescribed course of travel in order to avoid a dangerous obstruction. Tiner v. Hill (A.), 394 S.W.2d 425.

(1967) Purpose of this section is to change common law rule that one had the right to use either side of highway if way was unobstructed. This section does not create a motorist's duty to a pedestrian to avoid driving to the right of the right half of the roadway. Skiles v. Schlake (Mo.), 421 S.W.2d 244.

(1973) Backing road grader in southerly direction on northbound lane of highway held not to constitute driving on wrong side of road. Bounds v. Scott Construction Co. (Mo.), 498 S.W.2d 765.

Notes of Decisions
Cited in 78 cases (2 in the last 5 years), 1958–2023 · leading case: State v. Beam, 334 S.W.3d 699 (Mo. Ct. App. 2011).
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State v. Beam, 334 S.W.3d 699 (Mo. Ct. App. 2011). · cites it 22× “Improper Turn on Divided Highway In her third point on appeal, Beam claims the trial court erred in overruling her motion for judgment of acquittal at the close of all the evidence, and entering judgment and sentence for improper turn on a divided highway under Section 304.015.…”
State v. Swartz, 517 S.W.3d 40 (Mo. Ct. App. 2017). · cites it 8× “010, 1 and one count of Failure to Drive on the Right Half of the Roadway, section 304.015. Swartz was sentenced to six months in the county jail on the charge of Driving While Intoxicated, but the court suspended the execution of that sentence and placed him on two years of…”
State v. Rotter, 958 S.W.2d 59 (Mo. Ct. App. 1997). · cites it 15× “Rotter argues that insufficient evidence was presented to convict him of failing to drive on the right side of the roadway, section 304.015, RSMo. Specifically, Mr. Rotter contends that because section 304.”
German v. Kansas City, 512 S.W.2d 135 (Mo. 1974). · cites it 10× “Respondents contend plaintiff was contributorily negligent as a matter of law: In failing to operate his motor vehicle upon the right half of the road in violation of Section 304.015, RSMo 1969, V.A.M.S., and Kansas City Rev.”
Furlow v. Laclede Cab Co., 502 S.W.2d 373 (Mo. Ct. App. 1973). · cites it 11× “Huttig base their contentions on an allegation that the instruction failed to include the crucial and essential language of Section 304.015(5) (1) RSMo 1959, V. A.M.”
Stucker v. Chitwood, 841 S.W.2d 816 (Mo. Ct. App. 1992). · cites it 4× “, provides that upon all public roads or highways of sufficient width a vehicle shall be driven upon the right half of the roadway with these exceptions: (1) when overtaking and passing another vehicle, (2) when a vehicle is making a lawful left turn, (3) when the right half is…”
State v. Atkinson, 543 S.W.3d 656 (Mo. Ct. App. 2018). · cites it 14× “010, 1 and failing to drive on the right side of the road per section 304.015. In two points, Atkinson contends the trial court erred in rejecting her motion to suppress on the basis that there was no reasonable suspicion for the traffic stop, and in overruling her motion for…”
State v. Tevis, 340 S.W.2d 415 (Mo. Ct. App. 1960). · cites it 6× “Appellant suggests the allegation in the information about weaving is an attempt to show a violation of Section 304.015, V.A.M.S., concerning when it is necessary to drive on the right half of the roadway, and that the information is defective for failing to negate the…”
State v. Henderson, 750 S.W.2d 507 (Mo. Ct. App. 1988). · cites it 4× “CR486-87M charges *510 that the defendant, in violation of Section 304.015, RSMo, 2 committed a misdemean- or .”
State v. Friend, 943 S.W.2d 800 (Mo. Ct. App. 1997). · cites it 6× “The defendant also was convicted of driving the wrong way on a divided highway, § 304.015, RSMo 1994, and was sentenced to a concurrent term of 120 days confinement and a $200 fine.”
Hoover v. Denton, 335 S.W.2d 46 (Mo. 1960). · cites it 7× “But section 304.015, subd. 2 (Laws 1953, p. 587, 1957 Cum.”
Leonard v. Gordon's Transp., Inc., 575 S.W.2d 244 (Mo. Ct. App. 1978). · cites it 10× “§ 304.015(2) RSMo. 1969: “2. Upon all public roads or highways 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…”
Show all 78 citing cases →
— Mo. Rev. Stat. § 304.015(1) — 1 case
Phillips v. Stockman, 351 S.W.2d 464 (Mo. Ct. App. 1961).
— Mo. Rev. Stat. § 304.015(2) — 4 cases
Libby v. Hill, 687 S.W.2d 264 (Mo. Ct. App. 1985).
Leonard v. Gordon's Transp., Inc., 575 S.W.2d 244 (Mo. Ct. App. 1978). “§ 304.015(2) RSMo. 1969: “2. Upon all public roads or highways 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…”
Stemme Ex Rel. Stemme v. Siedhoff, 427 S.W.2d 461 (Mo. 1968).
Ellison v. Simmons, 447 S.W.2d 66 (Mo. 1969).
— Mo. Rev. Stat. § 304.015(2)(3) — 1 case
Leonard v. Gordon's Transp., Inc., 575 S.W.2d 244 (Mo. Ct. App. 1978). “§ 304.015(2) RSMo. 1969: “2. Upon all public roads or highways 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…”
— Mo. Rev. Stat. § 304.015(3) — 1 case
Stemme Ex Rel. Stemme v. Siedhoff, 427 S.W.2d 461 (Mo. 1968).
— Mo. Rev. Stat. § 304.015(4) — 1 case
Leonard v. Gordon's Transp., Inc., 575 S.W.2d 244 (Mo. Ct. App. 1978). “§ 304.015(2) RSMo. 1969: “2. Upon all public roads or highways 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…”
— Mo. Rev. Stat. § 304.015(5) — 1 case
Furlow v. Laclede Cab Co., 502 S.W.2d 373 (Mo. Ct. App. 1973). “Huttig base their contentions on an allegation that the instruction failed to include the crucial and essential language of Section 304.015(5) (1) RSMo 1959, V. A.M.”
— Mo. Rev. Stat. § 304.015(5)(1) — 2 cases
Furlow v. Laclede Cab Co., 502 S.W.2d 373 (Mo. Ct. App. 1973). “Huttig base their contentions on an allegation that the instruction failed to include the crucial and essential language of Section 304.015(5) (1) RSMo 1959, V. A.M.”
Missouri High. & Transp. Comm'n v. Mauer, 728 S.W.2d 722 (Mo. Ct. App. 1987).
— Mo. Rev. Stat. § 304.015(6) — 1 case
Leonard v. Gordon's Transp., Inc., 575 S.W.2d 244 (Mo. Ct. App. 1978). “§ 304.015(2) RSMo. 1969: “2. Upon all public roads or highways 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…”
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