Idaho Code

Idaho Code § 49-630 (2026)

Drive on right side of roadway — Exceptions.

✓ current as of May 2026

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Drive on right side of roadway — Exceptions.

(1) Upon all highways 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. Any person doing so shall yield the right-of-way to all vehicles traveling in the proper direction upon the unobstructed portion of the highway within a distance as to constitute an immediate hazard;

(d) Upon a highway restricted to one-way traffic.

(2) Upon all highways any vehicle proceeding at less than normal speed of traffic at the time and place and under the conditions then existing, shall be driven in the right-hand lane available for traffic, or as close as practicable to the right-hand curb or edge of the highway, 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) No vehicle shall be driven to the left of the center line upon any highway having four (4) or more lanes for moving traffic and providing for two-way movement of traffic, except when authorized by a traffic-control device designating certain lanes to the left side of the center of the highway for use by traffic not otherwise permitted to use such lanes, or except as permitted under subsection (1)(b) of this section. This subsection shall not be construed as prohibiting the crossing of the centerline in making a left turn into or from an alley, private road or driveway.

Notes of Decisions

Cited in 27 cases (1 in the last 5 years), 1990–2021 · leading case: State v. Nathan David Neal, 362 P.3d 514 (Idaho 2015).

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State v. Nathan David Neal, 362 P.3d 514 (Idaho 2015). · cites it 24× “Idaho Code sections 49-630 through 49-644 all address topics having to do with sharing the road with other drivers—for example, which side to drive on and applicable exceptions (I.C. §§ 49-630, 635, 636); rules for passing other vehicles (I.”

State v. Fuller, 416 P.3d 957 (Idaho 2018). · cites it 12× “On appeal, the State further contends that Deputy Ballman had reasonable suspicion that Fuller violated section 49-630(1). However, the State raises this argument without having asserted the same before the district court.”

State v. Islas, 443 P.3d 274 (Idaho Ct. App. 2019). · cites it 6× “While the State referenced our discussion of section 49-630 in [ State v. ] Neal [ 159 Idaho 439 , 362 P.”

State v. Slater, 32 P.3d 685 (Idaho Ct. App. 2001). · cites it 4× “The “roadway” means that portion of a highway that is “improved, designed or ordinarily used for vehicular travel.” I.C. § 49-119(18). It does not include “sidewalks, shoulders, berms [or] rights-of-way.”

State v. Devan, 482 P.3d 577 (Idaho Ct. App. 2020). · cites it 8× “§ 49- 637 and I.C. § 49-630. We therefore reject Devan’s contention that the State’s arguments were waived.”

State v. Anderson, 6 P.3d 408 (Idaho Ct. App. 2000). · cites it 5× “Idaho Code § 49-630 (1) requires that a vehicle be driven on the right half of the roadway, except in certain circumstances which are not applicable in this case.”

State v. Richard Glenn Morris, 365 P.3d 407 (Idaho Ct. App. 2015). · cites it 4× “Reasonable Suspicion After finding that the patrol officer witnessed Morris’ vehicle’s tires cross the solid white line, the district court determined that there was reasonable suspicion for the officer to initiate a traffic stop, as the officer had witnessed a traffic violation…”

Teply v. Lincoln, 874 P.2d 584 (Idaho Ct. App. 1994). · cites it 4× “At the close of the evidence, the trial court instructed the jury on the relevant highway safety statutes, including the statutes requiring that vehicles be driven upon the right-hand side of the highway, I.C. § 49-630, and that drivers approaching from opposite directions pass…”

Elson v. Defren, 283 A.D.2d 109 (N.Y. App. Div. 2001). “In May 1999, Defren and Rowland moved and Avis cross-moved to dismiss both actions on the ground of forum non conveniens.”

State v. McNair, 108 P.3d 410 (Idaho Ct. App. 2005). · cites it 2× “Presumably, the unlawful act to which the State refers is a violation of I.C. §§ 49-630, 49-631 and/or 49-637. Implicit in the State’s argument is the proposition that these statutes prohibiting driving to the left of the center line create criminal liability even if the driver…”

Priest v. Landon, 26 P.3d 1235 (Idaho Ct. App. 2001). · cites it 2× “” The next, instruction 13, was based upon Idaho Code §§ 49-630 , -631 and -635(l)(a).”

People v. Mueller, 2018 IL App (2d) 170863 (Ill. App. Ct. 2019). “at 520 (citing Idaho Code Ann. § 49-630 (1) (West 2014)).”

Show all 27 citing cases →

— Idaho Code § 49-630(1) — 10 cases

State v. Nathan David Neal, 362 P.3d 514 (Idaho 2015). “Idaho Code sections 49-630 through 49-644 all address topics having to do with sharing the road with other drivers—for example, which side to drive on and applicable exceptions (I.C. §§ 49-630, 635, 636); rules for passing other vehicles (I.”

State v. Fuller, 416 P.3d 957 (Idaho 2018). “On appeal, the State further contends that Deputy Ballman had reasonable suspicion that Fuller violated section 49-630(1). However, the State raises this argument without having asserted the same before the district court.”

State v. Islas, 443 P.3d 274 (Idaho Ct. App. 2019). “While the State referenced our discussion of section 49-630 in [ State v. ] Neal [ 159 Idaho 439 , 362 P.”

State v. Devan, 482 P.3d 577 (Idaho Ct. App. 2020). “§ 49- 637 and I.C. § 49-630. We therefore reject Devan’s contention that the State’s arguments were waived.”

State v. Anderson, 6 P.3d 408 (Idaho Ct. App. 2000). “Idaho Code § 49-630 (1) requires that a vehicle be driven on the right half of the roadway, except in certain circumstances which are not applicable in this case.”

— Idaho Code § 49-630(2) — 3 cases

State v. Jones (Idaho Ct. App. 2021).

State v. Kyle Kent Stringham (Idaho Ct. App. 2016).

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