South Carolina Bans Lane Splitting but Allows Two Riders Abreast

Section 56-5-3640 packs four rules and one exemption into a single short section, and the four have to be read together. Subsection (a) gives every motorcycle an entitlement to the full use of a lane and forbids any motor vehicle from being driven so as to deprive a motorcycle of that full lane. Subsection (b) prohibits a motorcycle operator from overtaking and passing in the same lane occupied by the vehicle being overtaken. Subsection (c) is the lane splitting ban. Subsection (d) caps lane sharing at two abreast. Subsection (e) disapplies items (b) and (c) for police officers in the performance of their official duties.

The most easily missed line is the second sentence of subsection (a). The full-lane entitlement "shall not apply to motorcycles operated two abreast in a single lane". South Carolina therefore trades one right against the other: riders may legally pair up in one lane, but the moment they do, the statutory claim that no motor vehicle may crowd them out of the full lane falls away for that lane. A pair riding side by side on a Charleston County arterial cannot invoke subsection (a) against a driver sharing the lane space they gave up.

The splitting prohibition is drafted twice over so that no gap opens between moving and stationary traffic. "Between lanes of traffic" reaches the classic split down a lane line on I-26 or I-85. "Between adjacent lines or rows of vehicles" reaches the queue itself, so filtering up to the stop bar at a Columbia signal is caught even though every vehicle involved is stationary. South Carolina wrote no speed differential threshold, no congestion trigger, no shoulder allowance and no time-of-day limit into the section, which means none of the conditional filtering schemes adopted elsewhere exists here.

Subsection (b) closes the remaining route. Even a rider who never crosses a lane line commits a separate offence by overtaking and passing a car inside the lane that car occupies, which is the manoeuvre most riders actually attempt in slow traffic.

The section is old and untouched. Its history line runs 1962 Code Section 46-498.2 and 1969 (56) 317, so the rules have stood in this form since 1969. The General Assembly amended the adjoining motorcycle operation section, 56-5-3630, as recently as 2016 Act No. 267 without reopening 56-5-3640, so the ban has survived a nearby amendment rather than simply being overlooked. Independently of Section 56-5-3640, Section 56-5-1900(a) requires that a vehicle be driven as nearly as practicable entirely within a single lane and not moved from the lane until the driver has ascertained that the movement can be made with safety, which reaches a rider straddling a lane line whatever else is going on around him.

Lane splitting carries no special penalty of its own, so Section 56-5-6190 applies: a violation of Chapter 5 for which no other penalty is provided is a misdemeanor punishable by a fine of not more than one hundred dollars or imprisonment for not more than thirty days. The licence consequence is usually the larger one. Under the point schedule at Section 56-1-720, passing unlawfully carries four points and driving in improper lane carries two, and Section 56-1-740 lets the Department of Motor Vehicles suspend a licence for up to six months once twelve points are assessed.

Section 56-1-750 counts points in full for twelve months after the last violation, at half value from twelve to twenty-four months, and not at all after twenty-four months. Section 56-1-770(B) gives riders a route back: a driver holding a Class M motorcycle endorsement has four points removed on proof of completing a South Carolina technical college motorcycle safety course or its equivalent, which must run at least eight hours.