South Carolina Traffic Laws & Driving Rules (2025 Complete Guide)
This comprehensive South Carolina driving law guide translates key sections of the SC Code of Laws into practical, easy-to-understand rules for everyday driving. Whether you're navigating coastal highways along the Grand Strand, city traffic in Charleston, Columbia, or Greenville, or scenic routes through the Upstate and Low Country, you'll find clear explanations of double yellow centerline regulations, no-passing zone rules, when right turns on red are permitted, how left turns and U-turns work across centerlines, school bus stop requirements, work zone safety laws, DUI penalties, and speed limits. This guide includes real-world examples, common traffic violations, and direct references to official SC Code statutes so you can verify each rule for yourself.
South Carolina's scenic coastal and upstate highways require drivers to follow double yellow no-passing zones, especially on curves and hills.
South Carolina Double Yellow Line Laws: No-Passing Zones & Crossing Rules (SC Code §56-5-1810)
South Carolina's no-passing zone regulations are governed by SC Code §56-5-1810, which establishes when drivers may and may not cross centerline markings. A double solid yellow line indicates a no-passing zone where drivers traveling in both directions are prohibited from using the opposing lane to overtake another vehicle. These markings typically appear on curves, hills, intersections, bridges, and other areas where passing would be dangerous due to limited sight distance or high traffic volume.
When you may legally cross double yellow lines in South Carolina
South Carolina law permits crossing double solid yellow lines in specific situations:
U-turns: Where U-turns are legal, visible, and can be completed safely (detailed below).
Obstruction avoidance: Briefly crossing to avoid a stationary obstacle, debris, disabled vehicle, or road hazard when it can be done safely and is necessary.
Official direction: When directed by law enforcement, work zone flaggers, or traffic control personnel.
Left turn across double yellow into driveways: signal, yield, and safe execution
When making a left turn across a double yellow centerline in South Carolina, you must signal your intention at least 100 feet in advance (or for the last 100 feet before turning on roads where 100-foot advance notice is impractical). Yield to all oncoming traffic and pedestrians, and complete the crossover in a single, continuous movement without lingering in the opposing lane or blocking through traffic. This is one of the most common and legally permitted crossings of double yellow lines.
When crossing for obstruction avoidance is allowed
If your lane is blocked by debris, a fallen tree, a disabled vehicle, road damage, or another hazard, South Carolina law allows you to edge left of center only as far as necessary to clear the obstruction safely, then return immediately to your lane. This exception does not permit passing slower-moving vehicles—it's strictly for unexpected stationary hazards. Always yield to oncoming traffic and proceed with extreme caution.
Penalties for illegal passing across double yellow in South Carolina
Illegally passing across double yellow lines in a no-passing zone can result in fines ranging from $100 to $200, court costs, and four points added to your South Carolina driving record. Accumulating too many points can lead to license suspension. If the illegal pass results in a crash or endangers others, additional charges such as reckless driving may apply, with increased fines and potential jail time.
Two sets of double yellow lines: painted median barriers in South Carolina
In South Carolina, when you encounter two sets of double yellow lines close together (often called a "painted median" or "double-double yellow"), you must treat this area as a physical barrier. You may not drive on, across, or within this painted median except at designated openings marked for left turns. Learn more about two sets of double yellow lines and how they function as barriers.
Center left-turn lanes (TWLTL) vs painted medians in SC
South Carolina also uses center left-turn lanes (two-way left-turn lanes or TWLTL), which have a different marking pattern: broken yellow lines on both sides with yellow crosshatch markings in the center. These lanes are shared by traffic traveling in both directions to make left turns. Do not confuse them with painted medians—center turn lanes are designed for shared use, while painted medians function as barriers.
Legal left turn across double yellow in SC: signal early, yield to oncoming traffic, and complete the turn in one smooth movement.
Common violations on coastal and upstate highways
South Carolina State Highway Patrol frequently enforces no-passing zone violations on scenic routes includingHighway 17 (the Coastal Highway), Highway 11 (the Cherokee Foothills Scenic Highway), and roads in the Upstate near Table Rock, Caesar's Head, and Paris Mountain. Illegal passing on winding roads with limited sight distance is dangerous and heavily cited. Always wait for a legal passing zone marked by a dashed yellow line on your side of the centerline.
Right Turn on Red in South Carolina: SC Code §56-5-970 Requirements
South Carolina law permits right turns on red after coming to a complete stop at the stop line, crosswalk, or point where you have a clear view of approaching traffic, unless a NO TURN ON RED sign is posted. Under SC Code §56-5-970, you must yield the right-of-way to pedestrians and vehicles lawfully proceeding through the intersection before making your turn. This is a frequently tested rule on theSouth Carolina driver's exam.
Complete stop requirement: behind the stop line or before the crosswalk
A complete stop means bringing your vehicle to a full halt with wheels motionless. Rolling stops—where the vehicle slows but does not stop entirely—are illegal and frequently cited by law enforcement, especially at intersections with red-light cameras or heavy pedestrian traffic. Stop behind the painted stop bar if one is present; otherwise, stop before entering the crosswalk or the edge of the intersection.
"NO TURN ON RED" signs and posted restrictions in SC cities
South Carolina municipalities can prohibit right turns on red at specific intersections by posting NO TURN ON RED signs. These restrictions are common in busy urban areas like Charleston, Columbia, Greenville, Myrtle Beach, and Spartanburg, particularly at intersections with heavy pedestrian traffic, complex signal phasing, or visibility challenges. Time-based restrictions (e.g., "No Turn on Red 7-9 AM, 4-6 PM") apply only during posted hours. Always scan for signage before turning.
Pedestrian right-of-way and crosswalk safety when turning right on red
Before executing a right turn on red, you must scan the crosswalk for pedestrians who have started crossing or are about to enter. South Carolina law (SC Code §56-5-3150) requires drivers to yield to pedestrians in crosswalks at all times—both marked and unmarked. Failing to yield can result in fines, points on your license, and increased penalties if a pedestrian is struck. Pedestrians always have the right-of-way in crosswalks.
Red-light camera enforcement in South Carolina cities
Several South Carolina cities use automated red-light cameras to enforce traffic signal violations. These cameras capture vehicles that fail to stop before the stop line or enter an intersection after the signal turns red. Violations typically result in a fine sent to the vehicle's registered owner. Even when making a legal right turn on red, you must come to a complete stop first to avoid triggering the camera and receiving a citation.
Left turn on red in South Carolina: one-way to one-way street rules
South Carolina permits left turns on red from a one-way street onto another one-way street after coming to a complete stop, unless prohibited by signage (SC Code §56-5-970). This rule is less well-known but equally valid. You must yield to all pedestrians and vehicles with the right-of-way before proceeding. Check our detailed guide on left on red from one-way to one-way for specific scenarios and examples.
Signal compliance and yielding requirements for left on red
Just like right on red, you must make a complete stop at the stop line or crosswalk before turning left on red from one one-way street to another. Scan for oncoming traffic from all directions, watch for pedestrians in crosswalks, and only proceed when the intersection is clear and safe. Protected-turn signals (green arrows) and "No Turn on Red" signs override the default permission.
Right turn on red in SC requires a complete stop behind the line, yielding to all pedestrians and traffic, and turning only when safe.
South Carolina U-Turn Laws: When and Where U-Turns Are Legal (SC Code §56-5-2130)
U-turns are generally legal in South Carolina when they can be made safely and do not interfere with other traffic. South Carolina law (SC Code §56-5-2130) prohibits U-turns in certain specific locations but otherwise permits them where adequate sight distance exists and no signs prohibit the maneuver. For detailed guidance, see our comprehensive guide on U-turns across double yellow lines.
U-turn prohibitions and restrictions under South Carolina law
South Carolina prohibits U-turns in the following locations:
On any curve or hill where your vehicle cannot be seen by other drivers within 500 feet.
Where a NO U-TURN sign is posted.
At intersections controlled by traffic signals unless specifically permitted by signs or signals.
In business districts where local ordinances prohibit U-turns.
Safe U-turn execution: sight distance, gap selection, and yielding
When making a legal U-turn in South Carolina, ensure you have adequate sight distance in both directions—typically at least 500 feet of clear visibility. Signal your intention (use your left turn signal), check mirrors and blind spots for vehicles, cyclists, and pedestrians, and yield to all approaching traffic. Execute the turn in a single, smooth motion without stopping in the opposing lane. Choose wide intersections, areas with center turn lanes, or designated U-turn locations when possible.
Posted "NO U-TURN" signs and business district restrictions
South Carolina cities and counties frequently post NO U-TURN signs at specific intersections, especially in downtown business districts, school zones, and high-traffic areas. These restrictions are enforceable by law, and violations can result in fines and points on your license. Always scan for posted signage before attempting a U-turn. In Charleston, Columbia, and Greenville downtowns, NO U-TURN signs are particularly common.
U-turn citations and defensive driving best practices
Illegal or unsafe U-turns in South Carolina can result in fines ranging from $50 to $150 and potentially four points on your license if deemed an improper or dangerous movement. To avoid citations, only make U-turns where visibility is excellent, traffic is light, and no signs prohibit the maneuver. When in doubt, continue to the next legal turning opportunity or intersection where you can safely reverse direction.
South Carolina School Bus Stop Laws: SC Code §56-5-2770 Requirements
South Carolina has strict school bus stop laws designed to protect children boarding and exiting buses. Under SC Code §56-5-2770, when a school bus displays flashing red lights and extends its stop arm, all traffic traveling in both directions on undivided roadways must stop at least 10 feet away from the bus. You may not proceed until the red lights stop flashing, the stop arm is retracted, and the bus begins moving—or until the bus driver signals you to proceed.
When you must stop for school buses: both-direction rule on undivided roads
On two-lane roads and multi-lane undivided highways, traffic in both directions must stop for a school bus with activated red lights and extended stop arm. This includes highways with center turn lanes or painted medians that are not physically divided. The only exception is when you are traveling in the opposite direction on a divided highway with a physical barrier such as a concrete median, raised curb, guardrail, or grassy median strip.
Divided highway exception: physical barriers and medians
On physically divided highways with a barrier separating opposing traffic (such as Interstate highways or major divided routes like portions of US-17 and US-378), drivers traveling in the opposite direction of the school bus are not required to stop. However, if you are traveling in the same direction as the bus, or on a road divided only by pavement markings (painted median), you must stop.
On undivided South Carolina roads, all traffic in both directions must stop for school buses with flashing red lights and extended stop arms.
Severe penalties for illegal school bus passing in South Carolina
Illegally passing a stopped school bus in South Carolina is one of the most serious traffic violations. Penalties include:
First offense: Fine up to $1,000 and possible license suspension for up to six months.
Second offense within five years: Fine up to $2,000, mandatory license suspension for one year, and possible jail time.
Six points added to your driving record for each violation.
Dramatically increased insurance premiums.
Criminal charges including vehicular manslaughter if a child is injured or killed.
Stop-arm camera enforcement and citation process
Many school buses in South Carolina are equipped with stop-arm cameras that record violations when vehicles illegally pass while the bus's red lights are flashing and stop arm is extended. Law enforcement agencies review footage and issue citations to registered vehicle owners. These camera-based citations carry the same penalties as officer-observed violations and must be taken seriously.
South Carolina Work Zone Safety Laws & Speed Limit Enforcement
South Carolina enforces strict work zone safety laws to protect highway workers and motorists. Speeding, reckless driving, and failure to obey work zone signs or flaggers can result in doubled fines, increased points, and potential license sanctions. Work zone crashes can also result in enhanced criminal penalties.
Work zone speed limits and doubled fines for violations
Work zones in South Carolina feature reduced speed limits posted on temporary signs (e.g., "WORK ZONE SPEED LIMIT 45 MPH" or "SPEED LIMIT 55 MPH WHEN WORKERS PRESENT"). These limits are enforceable and mandatory. South Carolina law doubles fines for speeding and certain other traffic violations committed in active work zones where workers or equipment are present. An "active" work zone means workers, equipment, or vehicles are visible on or near the roadway.
Following flaggers and temporary traffic control devices
In South Carolina work zones, flagger instructions override all other traffic control devices, including signs and signals. You must obey flaggers' hand signals and STOP/SLOW paddles immediately. Temporary traffic control devices such as cones, barrels, arrow boards, and portable signs provide critical guidance—follow them carefully and maintain a safe following distance. Failing to obey a flagger is a citable offense.
Worker safety zones and prohibited actions in construction areas
South Carolina law prohibits specific dangerous behaviors in work zones, including using a handheld mobile device (texting while driving is illegal statewide and enforcement is heightened in work zones), failing to merge when lanes close, and driving through marked buffer spaces or coned-off areas. Always stay alert, minimize distractions, and be prepared for sudden stops, lane shifts, and speed changes.
South Carolina DUI Laws, Speed Limits & Point System Overview
SC DUI laws: BAC limits, penalties, and ignition interlock requirements (SC Code §56-5-2930)
South Carolina enforces strict DUI (driving under the influence) laws under SC Code §56-5-2930. The legal blood alcohol concentration (BAC) limit is 0.08% for drivers 21 and over, 0.02% for drivers under 21 (zero tolerance), and 0.04% for commercial drivers. Penalties for DUI convictions increase with BAC level and number of offenses:
First offense (BAC 0.08-0.09%): Fine $400, 48 hours to 30 days jail (or public service), six-month license suspension, SR-22 insurance, and Alcohol and Drug Safety Action Program (ADSAP).
First offense (BAC 0.10-0.15%): Fine $500, mandatory minimum 72 hours jail, six-month suspension, ADSAP, and possible ignition interlock device.
First offense (BAC 0.16% or higher): Fine $1,000, minimum 30 days jail, six-month suspension, ADSAP, and mandatory ignition interlock.
Second offense: Fines up to $5,100, one to three years jail, two-year license suspension, ignition interlock for two years after reinstatement.
Third and subsequent offenses: Felony charges, fines up to $10,000, three to five years jail, four-year license suspension, permanent ignition interlock.
South Carolina is an "implied consent" state, meaning refusal to submit to chemical testing (breath, blood, or urine) results in automatic license suspension for six months (first refusal) or longer for subsequent refusals.
South Carolina speed limits: urban, rural, interstate, and school zone regulations
South Carolina speed limits vary by road type and area. Unless otherwise posted, speed limits are:
30 mph in urban and residential districts
55 mph on most two-lane rural highways and roads
60 mph on four-lane divided highways and some state routes
70 mph on Interstate highways (I-20, I-26, I-77, I-85, I-95)
15-25 mph in school zones when children are present or during posted hours
South Carolina follows the "reasonable and prudent" speed principle—drivers must always travel at speeds safe for current conditions (weather, traffic, visibility), even if below the posted limit. Speeding fines increase for excessive speeds, and speeds 25+ mph over the limit can result in reckless driving charges.
South Carolina point system: accumulation, suspension, and point reduction
South Carolina uses a point system to track traffic violations. Points range from 2 to 6 depending on the offense. Accumulating points can lead to license suspension:
12 or more points within 12 months: License suspended.
Points remain on your record for two years from the violation date.
You can reduce points by completing a state-approved Defensive Driving Course (removes up to four points once every three years).
Common point values: speeding 10+ mph over limit (4 points), reckless driving (6 points), improper passing (4 points), failure to yield (4 points), illegal school bus passing (6 points).
High-risk violations: reckless driving and aggressive driving in SC
South Carolina treats certain violations as high-risk offenses with severe penalties. Reckless driving(SC Code §56-5-2920) involves willful or wanton disregard for the safety of persons or property and can result in fines up to $200, up to 30 days in jail, and six points on your license. Aggressive driving—speeding combined with other unsafe behaviors like tailgating, improper passing, or running red lights—also carries enhanced penalties. Both offenses significantly increase insurance rates and may lead to license suspension.
Official South Carolina Driving Resources & SCDMV Links
This guide summarizes South Carolina driving laws for educational purposes only and is not legal advice. Always consult the official South Carolina Code of Laws, SCDMV guidance, and posted traffic signs for authoritative information. Traffic laws are subject to change—verify current regulations with official sources.
South Carolina Traffic Laws: Double Yellow, Right on Red & Driving Rules 2025
