Lane splitting is expressly illegal in Texas since September 2023

Before 2023 the answer to this question in Texas had to be assembled from the general lane-discipline rule in Transportation Code Section 545.060(a), which requires an operator on a roadway divided into two or more clearly marked lanes to "drive as nearly as practical entirely within a single lane" and forbids moving out of the lane unless the movement can be made safely. That rule was written for all traffic and never named motorcycles, so riders and officers argued about how far it reached. House Bill 4122 of the 88th Legislature ended the argument by adding Section 545.0605, effective September 1, 2023.

The new section is written as a package of rights and prohibitions. Section 545.0605(a)(1) gives a rider something in return: the operator of a motorcycle is entitled to the full use of a lane, and a motor vehicle may not be driven in a manner that deprives a motorcycle of that full use. Section 545.0605(a)(2) permits two motorcycles to travel two abreast in a single lane, which is the statutory basis for group riding in staggered or paired formation in Texas.

The prohibitions sit in Section 545.0605(a)(3). Subdivision (A) caps the abreast allowance at two, so three motorcycles side by side in one lane is an offense. Subdivision (B) is the lane-splitting ban itself, phrased as operating "between lanes of traffic moving in the same direction." Note what that language covers and what it does not. It reaches the classic ride up the white line between two lanes of same-direction traffic, whether that traffic is stopped in a jam on Interstate 35 or rolling at speed, because the statute contains no speed threshold, no traffic-condition trigger and no congestion exception. It is worded around traffic moving in the same direction, so it does not on its face address a rider crossing the centre line into opposing traffic, which is separately governed by Section 545.054 and Section 545.056.

Subdivision (C) closes the obvious workaround. A rider who stays inside a single marked lane but slips past a car occupying the same lane is passing a motor vehicle while in the same lane as the vehicle being passed, which Section 545.0605(a)(3)(C) prohibits outright. Between subdivisions (B) and (C), Texas law leaves a motorcycle no lawful way to overtake stopped or slow traffic other than by changing lanes in the ordinary way.

The surrounding passing rules confirm how narrow the alternatives are. Section 545.053(a)(1) requires an operator passing another vehicle to pass to the left at a safe distance. Section 545.057(a) allows a pass on the right only where conditions permit doing it safely and the vehicle being passed is making or about to make a left turn, and only on a road with unobstructed pavement wide enough for two or more lines of moving vehicles in each direction, or on a one-way street or one-direction roadway wide enough for two or more lines. Section 545.057(b) forbids passing on the right by leaving the main travelled portion of the roadway except as Section 545.058 allows, and Section 545.058(a)(4) permits shoulder use to pass a vehicle that is slowing, stopped, disabled or preparing a left turn only where that operation is necessary and can be done safely.

Section 545.0605(b) contains the sole exemption: subsection (a)(3) does not apply to a police officer in the performance of the officer's official duties. Motorcycle officers may therefore split lanes on Texas roads where a civilian rider may not, and no comparable exception exists for emergency medical responders, couriers or riders escorting a funeral procession.

301(b) makes that offense a misdemeanor unless another penalty is provided. 401 applies: a fine of not less than $1 or more than $200 on conviction. There is no confinement, and no driver's license suspension flows from the section itself. A citation is written by any peace officer with traffic authority, from a Texas Department of Public Safety trooper on a state highway to a municipal officer inside city limits, and is filed in the municipal court or justice court with jurisdiction. The practical exposure is usually larger than the fine.

0605(a)(3) offers no defence based on traffic being stopped, on the manoeuvre being performed slowly, or on the rider believing it was safer than sitting in the lane. 302 adds separate exposure for a person who owns the motorcycle, or who employs or directs its operator, and who requires or knowingly permits the operator to ride in a manner that violates the law.