The History of DWI Law in North Carolina: From DUI to the Safe Roads Act

NC DWI Law Basics · History

The history of DWI law in North Carolina turns on one date: October 1, 1983, when the Safe Roads Act replaced the old “driving under the influence” offenses with a single crime of impaired driving, mandatory sentencing levels and an immediate license revocation. Nearly every rule a North Carolina driver faces today, from the 0.08 limit adopted in 1993 to the Aggravated Level One sentence created by Laura’s Law in 2011, was built on that 1983 foundation.

A short history of DWI law in North Carolina

North Carolina’s impaired-driving law developed in three eras. Before 1983, the state prosecuted “driving under the influence” under G.S. 20-138 and related statutes, with a chemical-test law added in 1963 and a separate 0.10 offense in 1975. The Safe Roads Act of 1983 swept those offenses away and created the modern DWI. Since then, the General Assembly has steadily tightened the law, lowering the limit, adding felony and repeat-offender provisions, expanding ignition interlock and creating harsher sentences for the worst cases.

Knowing that history is practical, not just interesting. It explains why North Carolina calls the offense “DWI” rather than DUI (see our guide to DWI vs. DUI terminology), why prosecutors cannot quietly reduce a DWI to reckless driving, and why old convictions under repealed statutes can still count as “prior” offenses today.

Timeline: North Carolina impaired-driving law, 1940s to today

The milestones below are drawn from the session laws and statute history notes on ncleg.gov and from the UNC School of Government’s “DWI: Historical Perspective and Legislative Update” (James Drennan and Shea Denning, 2011).

1. 1946By this time G.S. 20-138 made it a crime to drive on a public highway “under the influence of intoxicating liquor or narcotic drugs.” In State v. Carroll, the Supreme Court defined that phrase as an “appreciable impairment” of bodily or mental faculties.
2. 1963The General Assembly enacts the implied-consent statute, G.S. 20-16.2 (1963, c. 966), tying the privilege of driving to submitting to a chemical test.
3. 1975A new G.S. 20-138(b) makes it a separate offense to drive with a blood alcohol of 0.10 percent or more (S.L. 1973-1081, effective January 1, 1975).
4. 1981–82North Carolina records 96,404 drunk-driving arrests in 1981. Governor Jim Hunt’s study committee proposes replacing DUI and related offenses with a single “impaired driving” offense.
5. 1983The Safe Roads Act of 1983 (S.L. 1983-435) is ratified June 3 and takes effect October 1: one offense (G.S. 20-138.1), five punishment levels, a 10-day pre-trial civil revocation, limits on dismissals, a beer purchase age of 19 and a ban on drinking beer or wine while driving.
6. 1984State v. Rose upholds the 0.10 per se prong against a vagueness challenge; State v. Coker confirms that “driving” and “operating” mean the same thing and that DWI is one offense provable two ways.
7. 1986Drinking age raised to 21. Henry v. Edmisten upholds the Safe Roads Act’s pre-hearing license revocation.
8. 1988A 0.04 alcohol concentration standard is set for driving a commercial vehicle.
9. 1990Habitual impaired driving becomes a felony (G.S. 20-138.5).
10. 1993The per se limit drops from 0.10 to 0.08 (S.L. 1993-285, effective October 1, 1993).
11. 1994“Booze It & Lose It” launches its first statewide enforcement wave in November.
12. 1995–98DWI Task Force reports lead to zero tolerance for drivers under 21, vehicle forfeiture for repeat offenders and doubled maximum fines.
13. 1999Ignition interlock required for limited privileges and license restoration for repeat offenders and drivers at 0.16 or more.
14. 2000Congress ties highway funding to a 0.08 law; by 2004 every state has adopted it.
15. 2006S.L. 2006-253 broadly revises DWI law, including the Schedule I controlled-substance prong now in G.S. 20-138.1(a)(3).
16. 2008The Intox EC/IR II is in service; state maintenance records for it begin in February 2008.
17. 2011Laura’s Law (S.L. 2011-191) creates Aggravated Level One, effective December 1, 2011.
18. 2016Sheyenne’s Law creates felony impaired-boating offenses, mirroring DWI-related death and injury crimes on the water.

Before 1983: DUI, the “.10 violation” and plea bargains

Before the Safe Roads Act, North Carolina had several overlapping drinking-and-driving offenses, and prosecutors and defendants often negotiated between them. The main crime was driving under the influence under G.S. 20-138. After 1975 there was also the separate 0.10 offense in G.S. 20-138(b), plus reckless driving after drinking under G.S. 20-140(c).

The Supreme Court’s 1946 decision in State v. Carroll set the standard that still shapes jury instructions. A trial judge had told jurors that anyone whose faculties were affected “however slightly” was under the influence. The Court ordered a new trial and held that a person is under the influence only when the alcohol or drugs cause an “appreciable impairment” of bodily or mental faculties. That phrase survives in modern DWI law; see our discussion of the “appreciably impaired” standard under G.S. 20-138.1.

By the early 1980s, critics argued the system was too forgiving. A 1982 N.C. Insight analysis by the N.C. Center for Public Policy Research reported 96,404 drunk-driving arrests in 1981, about one for every 60 residents, and described how charges were routinely reduced to a “.10 violation” or reckless driving and how first offenders rarely received active jail time.

The Safe Roads Act of 1983: what it changed

The Safe Roads Act of 1983 created the DWI law North Carolina still uses. Senate Bill 1 of the 1983 session, ratified June 3, 1983 and effective October 1, 1983, was framed as an act to reduce impaired driving and to require mandatory jail terms for grossly aggravated drunk drivers. It repealed G.S. 20-138, 20-139 and 20-140(c) in favor of a new G.S. 20-138.1.

The 1983 session law did much more than rename the crime:

• One offense, two theories. Impairment and the per se alcohol level became two ways of proving the same crime, ending the old lesser-offense bargaining.
• Five punishment levels. New G.S. 20-179 set Level One (up to $2,000 and 14 days to 24 months) through Level Five (up to $100 and 24 hours to 60 days), with sentencing based on grossly aggravating, aggravating and mitigating factors. The modern grid is explained in our sentencing levels guide.
• Immediate civil revocation. New G.S. 20-16.5 revoked the license of a driver charged with DWI who refused or tested at 0.10 or more, for at least 10 days, before any trial. Today that period is 30 days; see our 30-day civil revocation guide.
• No quiet dismissals. New G.S. 20-138.4 required prosecutors to put detailed reasons in the record when they dismiss or reduce a DWI; “interests of justice” was not enough.
• Refusal and limited privileges. A 12-month revocation for refusing a chemical test, and a new limited driving privilege statute, G.S. 20-179.3.
• Young drivers and open containers. The beer purchase age rose from 18 to 19, and drivers could no longer drink beer or unfortified wine in the passenger area.

The Safe Roads Act did not just make penalties tougher. It changed the shape of a DWI case, and that shape still governs every courtroom in North Carolina.Adkins & Purkey

How the courts tested the new law

The Safe Roads Act was challenged almost immediately, and the North Carolina Supreme Court upheld its core features. Those early decisions are still cited in DWI cases today.

From 0.10 to 0.08: North Carolina’s 1993 change

North Carolina lowered its per se limit to 0.08 effective October 1, 1993, seven years before Congress pushed the rest of the country in that direction. S.L. 1993-285 changed 0.10 to 0.08 in G.S. 20-138.1 and in the implied-consent and civil-revocation statutes, while leaving the 0.04 commercial-vehicle standard in place.

Nationally, the FY 2001 Department of Transportation Appropriations Act, enacted in October 2000, gave states until October 1, 2003 to adopt a 0.08 law or begin losing a growing share of certain highway construction funds, according to NHTSA. MADD, founded in 1980 by Candace Lightner after her 13-year-old daughter was killed by a drunk driver, reports that all 50 states had adopted 0.08 by 2004. Breath testing changed too: North Carolina moved from the Intoxilyzer 5000 used in the 1990s (it appears in Oliver) to the Intox EC/IR II.

Repeat offenders, young drivers and ignition interlock

After 1983, most changes targeted three groups: repeat offenders, drivers under 21, and high-BAC drivers. A felony offense of habitual impaired driving arrived in 1990 and, as amended, now applies to a person with three or more prior impaired-driving convictions within 10 years, a Class F felony with a 12-month minimum active term.

The School of Government’s history traces the rest: the drinking age reached 21 in 1986; commercial drivers got a 0.04 standard in 1988; zero tolerance for drivers under 21 came in 1995 (see under-21 DMV consequences and our commercial driver guide); and in 1999 ignition interlock became a condition for repeat offenders and drivers at 0.16 or more, the start of the system described in our ignition interlock guide.

Laura’s Law and Aggravated Level One (2011)

Laura’s Law created the most serious misdemeanor DWI sentence in North Carolina. It is named for Laura Fortenberry, a 17-year-old passenger killed in 2010 when the car she was riding in was struck head-on on the Dallas-Cherryville Highway in Gaston County by a driver with prior DWI convictions, as WBTV reported.

According to the UNC School of Government’s summary of S.L. 2011-191, for offenses on or after December 1, 2011, a judge must impose Aggravated Level One when three or more grossly aggravating factors exist. The sentence is 12 to 36 months with no parole eligibility, a fine of up to $10,000, release four months before the maximum term onto post-release supervision with continuous alcohol monitoring, and permanent license revocation (with interlock required for any restoration). The same act expanded alcohol monitoring for Level One and Two probation. Our guide to aggravating and mitigating factors explains how those factors are counted today.

Has it worked? North Carolina alcohol-impaired deaths

Alcohol-impaired crashes remain a major share of North Carolina traffic deaths. In NHTSA’s 2023 data, North Carolina recorded 415 alcohol-impaired-driving fatalities, 27 percent of all traffic deaths in the state. The recent trend, as reported by the Governor’s Highway Safety Program from federal FARS data, is below.

Whether any single law “worked” is hard to measure, because enforcement, vehicle safety, rideshare and miles driven all change at the same time. We look at one of those factors in our analysis of rideshare and DWI crash trends, and at broader figures in our North Carolina impaired-driving statistics page.

Why this history matters in a DWI case today

History is built into the current statutes. Three examples come up in real cases:

1. Old convictions can still count

   G.S. 20-4.01(24a) defines “offense involving impaired driving” to include repealed offenses substantially similar to impaired driving, naming former G.S. 20-138 and 20-139, while excluding convictions under former G.S. 20-140(c). That definition matters for second-offense and habitual DWI cases.

2. Reductions must be explained

   The 1983 rule in G.S. 20-138.4 is why a DWI plea in North Carolina usually means a plea to DWI itself, a point we cover in plea or trial.

3. The two theories still drive trial strategy

   Because DWI is one offense provable by impairment or by a 0.08 result (Coker, Oliver), the defense must address both the breath or blood number and the officer’s impairment evidence.

History of DWI law in North Carolina: FAQ

General North Carolina legal information as of November 2026, not legal advice for any specific case. Reading this article does not create an attorney-client relationship. Attorney advertising.