Distinguish lane changes drifting and wrong way driving

By Jacob Alford

Draw where the vehicle started, where it moved and whether the movement was intentional. Drifting out of a lane is different from changing lanes, driving left of center or entering the wrong direction on a divided road. The statute’s practical and safety qualifications matter. A diagram that omits lane markings or a road transition can leave a misleading impression.

Questions this group helps answer:

• Was this an intentional lane change or a failure to remain in lane?
• What if there was an obstruction or unclear lane marking?
• What does failed to give half the road mean?
• Which code concerns illegal passing near an intersection?
• How is wrong-way travel different from crossing a two-way centerline?

4. Changed lane when unsafe

Meaning in the report: A vehicle intentionally left its lane on a multilane roadway when the movement could not be made safely.

What needs explaining: The current definition expressly calls for an intentional lane movement. Compare code 23 for failure to stay within a lane. Was this a deliberate lane change, a drift, an evasive movement or a disputed account?

Limits and qualifications: Do not treat codes 4 and 23 as interchangeable labels without examining the maneuver.

Related law and scope: On a roadway divided into two or more clearly marked traffic lanes, (a)(1) requires driving as nearly as practical entirely within a single lane; (a)(2) forbids moving from it unless safe.

Sources: TxDOT definition, page 137; Transportation §545.060(a).

Further care: Manual factor 4 describes an intentional lane movement. Intentional versus unintentional is a reporting distinction, not language found in this subsection. The clearly marked lanes and as-nearly-as-practical qualifications still matter.

23. Failed to drive in single lane

Meaning in the report: A vehicle on a multilane road failed to remain within its lane and the departure contributed to the crash.

What needs explaining: Distinguish lane drift or failure to remain in lane from the intentional lane change in code 4. Where were the lane lines, tire paths and impact points, and was the departure intentional?

Limits and qualifications: Read the statute’s practical and safety qualifications. A lane departure does not by itself resolve every legal element.

Related law and scope: The statute requires, on a roadway with two or more clearly marked traffic lanes, driving as nearly as practical entirely within a lane and leaving it only when safe.

Sources: TxDOT definition, page 138; Transportation §545.060(a).

Further care: The manual’s paraphrase omits as nearly as practical. A mere lane departure is not a complete factual or legal analysis. The statute is not an absolute stay-in-lane rule regardless of the circumstances.

24. Failed to give half of roadway

Meaning in the report: A driver meeting oncoming traffic on a road wide enough for a lane each way did not give the other vehicle its half.

What needs explaining: The manual describes opposing traffic, not ordinary overtaking. Was the road wide enough, and how much of each half was available and used?

Limits and qualifications: Road width, obstructions and vehicle positions matter; this is not a universal rule that every narrow road has two full lanes.

Related law and scope: Opposing traffic must move/remain right; on a roadway wide enough for not more than one traffic line each direction, give at least half of the main traveled portion, or if that is not possible, as much as possible.

Sources: TxDOT definition, page 138; Transportation §545.052.

Further care: Manual says fully one-half but omits §545.052(2)(B)’s impossibility alternative. Also retain the statute’s roadway-width setting.

69. Wrong side approach or intersection

Meaning in the report: Illegal passing left of center while approaching or traversing an intersection contributed.

What needs explaining: Identify the passing maneuver and apply the statute’s location-based limits and exceptions. How close was the vehicle to the intersection and what lane arrangement or exception applied?

Limits and qualifications: The statute also covers other locations. Do not expand this particular factor’s label into all left-of-center driving.

Related law and scope: The statute prohibits left-side roadway driving within 100 feet approaching intersections or rail crossings in a municipality; outside a municipality the intersection/crossing must be appropriately signed/marked. Subsection (b) excepts one-way roads and left turns into/from alleys/private roads/driveways.

Sources: TxDOT definition, page 142; Transportation §545.056(a)(1),(2); Transportation §545.056(b) (related provision).

Further care: Manual calls this illegal overtaking/passing; the statute’s coverage is not restricted to passing. The 100-foot distance, signs or markings outside a municipality, and left-turn exceptions affect whether the movement was prohibited.

70. Wrong side not passing

Meaning in the report: A vehicle used the wrong side of the road while not overtaking a vehicle going the same direction.

What needs explaining: Distinguish ordinary wrong-side driving from passing and from a wrong-way one-way movement. Was there an obstruction, lane closure or another lawful reason to use the other side?

Limits and qualifications: Right-side driving rules have exceptions; the lane position must be assessed in context.

Related law and scope: On a sufficiently wide roadway, drive on the right half except passing, necessary obstruction avoidance with yielding, three-marked-lane roads, or one-way roads. Subsection (c) gives additional four-or-more-lane two-way centerline rules and exceptions.

Sources: TxDOT definition, page 142; Transportation §545.051.

Further care: The factor’s exclusion of passing does not remove the statute’s other exceptions. Crossing left for a permitted turn or necessary safe obstruction avoidance is not automatically unlawful.

71. Wrong way one way road

Meaning in the report: A vehicle traveled against the allowed direction on a one-way road or divided highway and contributed.

What needs explaining: Establish the roadway’s directional designation and the vehicle’s course. What signs, divider, entrance geometry and travel evidence establish the wrong-way movement?

Limits and qualifications: One-way travel and driving left of center on a two-way road are different situations.

Related law and scope: Section 545.059(b) requires following the direction indicated on a designated and signed one-way roadway; (c) addresses rotary islands. The manual also mentions wrong-way on divided highways, for which §545.063(a) is the more direct related rule.

Sources: TxDOT definition, page 142; Transportation §545.059; Transportation §545.063(a)–(b) (related provision).

Further care: Manual’s sole citation does not fully cover its divided-highway description. Section 545.063 allows official-device or police direction to use another roadway.

Attorney reviewed by Jacob Alford · November 11, 2026