Traffic Law in South Australia — What You Need to Know Right Now
Do You Need a Lawyer?
A lawyer becomes critical when a conviction, imprisonment or a meaningful disqualification is on the table. That includes mid-range and high-range drink driving (BAC 0.08 and over), driving under the influence, any drug-driving prosecution beyond a first-offence expiation, driving while disqualified or unlicensed, and any charge of careless or dangerous driving — and absolutely any charge involving death or serious harm, which is dealt with in the District Court. You should also get advice if you are at risk of reaching 12 demerit points, if you depend on your licence for work, or if you want to argue the South Australian "trifling offence" provision to reduce a minimum disqualification to one month. For a single low-value expiation notice with no demerit points, a lawyer is usually not necessary — but it is still worth a phone call to confirm.
The Law in South Australia
Traffic law in South Australia rests on two principal statutes. The Road Traffic Act 1961 (SA) is the road-safety Act: it sets out the rules of the road and the main driving offences — drink and drug driving, dangerous and careless driving, speeding and driving while disqualified. The detailed day-to-day rules (speed limits, signals, give way, mobile phone use, seatbelts) come from the Australian Road Rules as adopted through the Road Traffic (Road Rules — Ancillary and Miscellaneous Provisions) Regulations 2014 (SA), which are made under that Act. Where the Road Traffic Act creates an offence but states no specific penalty, the default maximum is a fine of up to $2,500 under section 164A.
The Motor Vehicles Act 1959 (SA) governs the administrative side: driver licensing, vehicle registration, compulsory third party (CTP) insurance, and the demerit points scheme. The points themselves are recorded by the Registrar of Motor Vehicles (Service SA, within the Department for Infrastructure and Transport), and Schedule 4 of the Motor Vehicles Regulations 2025 (SA) sets out which offences carry how many points.
Most minor traffic offences are "expiable" — meaning you can be issued an expiation (infringement) notice and pay a set fee without any conviction being recorded. If you do not want to pay, you can elect to be prosecuted instead, and the matter is heard in the Magistrates Court of South Australia. The Magistrates Court is the first-instance court for almost all traffic and driving matters: it handles summary offences, can impose licence disqualification, and deals with drink and drug driving, careless driving and dangerous driving.
The most serious driving offences — chiefly causing death or serious harm by dangerous driving — are indictable and are tried in the District Court of South Australia. The Supreme Court of South Australia hears the most serious indictable prosecutions and, importantly, hears appeals from the Magistrates Court (usually before a single Judge) against conviction or sentence. Appeal deadlines are tight — generally a notice of appeal must be filed within 21 days — so if you are convicted and want to challenge the result, getting advice immediately matters.
A practical feature worth knowing is the "trifling offence" provision: where a court is satisfied on oath that an offence is trifling, it can reduce a mandatory minimum disqualification to as little as one month. This is a high bar and is not available for the most serious matters, but it is one of the few ways the otherwise rigid minimum periods can be softened.
Key Legislation & Courts
KEY SOUTH AUSTRALIA TRAFFIC LAW LEGISLATION AND COURTS
Legislation:
- Road Traffic Act 1961 (SA) — rules of the road and main driving offences; default max penalty $2,500 (s 164A) where none stated
- Australian Road Rules / Road Traffic (Road Rules — Ancillary and Miscellaneous Provisions) Regulations 2014 (SA) — speed limits, signals, give way, mobile phones, seatbelts
- Motor Vehicles Act 1959 (SA) — licensing, registration, CTP insurance, demerit points; Sch 4 Motor Vehicles Regulations 2025 (SA) lists points
Courts:
- Magistrates Court of South Australia — first instance for almost all traffic matters; disqualification
- District Court of South Australia — serious indictable driving (death/serious harm by dangerous driving)
- Supreme Court of South Australia — appeals from Magistrates Court (usually single Judge); most serious indictable prosecutions
Key bodies:
- Registrar of Motor Vehicles (Service SA / Department for Infrastructure and Transport) — records demerit points, issues loss-of-licence notices, manages disqualification and reinstatement
- Legal Services Commission of South Australia — free Legal Help Line 1300 366 424
What Happens Next — Step by Step
1
Read your expiation notice or charge carefully and note every date — the due date for paying, and the deadline to elect to be prosecuted if you want to dispute it.
2
Identify which path applies: a set fee with no conviction (expiation) or a court matter, and check whether demerit points or a minimum disqualification attach to your offence.
3
Check your demerit points position with Service SA / the Registrar of Motor Vehicles, especially if you are near the 12-point threshold over a 3-year period.
4
Get free initial information from the Legal Services Commission of SA on 1300 366 424, or use this hotline to understand your options.
5
If a conviction, imprisonment or real disqualification is in play, book a fixed-fee consultation with an admitted lawyer before any deadline or court date passes.
Mistakes to Avoid
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Paying an expiation fee to make it go away without realising it still adds demerit points or triggers a mandatory disqualification.
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Missing the deadline to elect to be prosecuted, which removes your chance to dispute the allegation in the Magistrates Court.
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Assuming a minimum drink-driving disqualification is negotiable — the 3, 6 and 12-month minimums are set by statute and only narrow exceptions like the trifling-offence provision apply.
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Continuing to drive after a disqualification or while unlicensed, which is a separate and more serious offence in its own right.
Likely Outcomes
Outcomes range from a set fee with no conviction up to imprisonment, depending on the offence. A low-range drink-driving offence (BAC 0.05–0.079) can be dealt with by expiation: a fee around $875 plus 4 demerit points. If instead it is prosecuted in court, expect a fine up to about $1,100, 4 demerit points and disqualification of not less than 3 months. Mid-range (BAC 0.08–0.149) brings a fine of roughly $900–$1,300, 5 demerit points and immediate disqualification of not less than 6 months. High-range (BAC 0.15 or over) brings a fine of roughly $1,100–$1,600, 6 demerit points and immediate disqualification of not less than 12 months. Driving under the influence of alcohol or drugs carries a fine of $1,100–$1,600 or up to 3 months imprisonment, mandatory disqualification of not less than 12 months and 6 demerit points. A first drug-driving offence is typically dealt with by expiation: the fee (around $875), 4 demerit points and a 3-month disqualification; a second drug-driving offence means disqualification of not less than 12 months. On demerit points, accumulating 12 or more in any 3-year period triggers a licence suspension or a good-behaviour option; points are erased 3 years after the offence date. Expiation fees are due within the period stated on the notice; court matters can take weeks to months to be listed and finalised.
Expiation (no conviction)
Pay a set fee with no conviction recorded — e.g. low-range drink driving around $875 plus 4 demerit points; first drug-driving offence carries the fee, 4 points and a 3-month disqualification.
Court fine + disqualification
Prosecuted matters bring a fine (roughly $900–$1,600 for mid/high-range PCA) plus minimum disqualification of 6 months (mid-range) or 12 months (high-range), set by statute.
Demerit points suspension
Reaching 12 or more points in a 3-year period triggers a suspension or a good-behaviour option; points are erased 3 years after the offence date.
Imprisonment (serious cases)
Driving under the influence can mean up to 3 months imprisonment; causing death or serious harm by dangerous driving is tried in the District Court and carries far heavier penalties.
Legal Aid in South Australia
The Legal Services Commission of South Australia runs a free Legal Help Line on 1300 366 424, where you can get initial information and guidance about a traffic matter, and its website (lsc.sa.gov.au) has plain-English fact sheets on drink driving, demerit points and licence loss. Be realistic about the limits: the Help Line gives general legal information and brief advice, not ongoing representation, and grants of legal aid for traffic matters are limited and means-tested — they are generally reserved for matters where imprisonment is a genuine risk. Many people will not qualify for a grant for a standard drink-driving or licence matter. The Commission can still point you in the right direction, and free duty-solicitor help is sometimes available at court on the day. If your matter is serious and you do not qualify for aid, a fixed-fee consultation with a private lawyer is often the most cost-effective way to understand your real options before your court date.
How Legal Hotline Can Help
Legal Hotline is a free, 24/7 legal-information service. We are not a law firm and we do not give legal advice. What we do is help you understand the landscape — which South Australian Act applies to your situation, what the common penalties and disqualification periods look like, the difference between paying an expiation fee and electing to go to court, how demerit points work, and where the deadlines fall. That is legal information: general explanations of how the law operates. Legal advice — telling you what you specifically should do about your charge, running an argument like the trifling-offence provision, or appearing for you — must come from an admitted Australian lawyer. When your matter needs that, we can help you book a fixed-fee consultation with an admitted lawyer so you know the cost upfront and can make a clear decision.
Frequently Asked Questions — Traffic Law in South Australia
Which South Australian law covers my traffic offence?
It depends on the issue. The Road Traffic Act 1961 (SA) and the Australian Road Rules (adopted through the 2014 SA Regulations) cover driving offences and the rules of the road. The Motor Vehicles Act 1959 (SA) covers licensing, registration, CTP insurance and the demerit points scheme. Many offences touch both — for example, a speeding offence is charged under the road rules but the demerit points come through the Motor Vehicles Act.
What is the difference between paying an expiation notice and going to court?
Paying an expiation (infringement) fee resolves the matter with no conviction recorded, but any demerit points or mandatory disqualification still apply. If you want to dispute the allegation, you must formally elect to be prosecuted within the time on the notice, and the matter goes to the Magistrates Court of South Australia, where a conviction could be recorded if you are found guilty.
How do demerit points work in South Australia?
Points are recorded by the Registrar of Motor Vehicles and apply from the date of the offence. Each offence carries a set number of points (listed in Schedule 4 of the Motor Vehicles Regulations 2025). If you accumulate 12 or more points within a 3-year period, you face a licence suspension or can take a good-behaviour option. Points are erased 3 years after the offence date.
What is the minimum disqualification for drink driving in SA?
It depends on the reading. Low-range PCA (0.05–0.079) carries not less than 3 months if prosecuted; mid-range (0.08–0.149) carries immediate disqualification of not less than 6 months; high-range (0.15 or over) carries not less than 12 months. Driving under the influence carries mandatory disqualification of not less than 12 months. These minimums are set by statute under the Road Traffic Act 1961 (SA).
Can I reduce a mandatory disqualification?
In limited cases. South Australia has a "trifling offence" provision that allows a court, if satisfied on oath that the offence is trifling, to reduce a minimum disqualification to as little as one month. It is a high bar, is not available for the most serious matters, and depends entirely on the facts — this is exactly the kind of argument where advice from an admitted lawyer matters.
What happens with a first drug-driving offence?
A first drug-driving offence in South Australia is typically dealt with by expiation: you pay the set fee (around $875), receive 4 demerit points and a 3-month licence disqualification. A second drug-driving offence is more serious and carries disqualification of not less than 12 months. Drug driving here usually means the presence of a prescribed drug in oral fluid or blood, not necessarily impairment.
Which court will hear my traffic matter?
Almost all traffic and driving matters start in the Magistrates Court of South Australia. The most serious driving offences — such as causing death or serious harm by dangerous driving — are indictable and heard in the District Court. The Supreme Court of South Australia hears appeals from the Magistrates Court and the most serious indictable prosecutions.
Can I appeal a traffic conviction or sentence?
Yes. Appeals from the Magistrates Court are generally heard in the Supreme Court of South Australia, usually before a single Judge, against conviction or sentence. The time limit is short — generally a notice of appeal must be filed within 21 days — so if you have been convicted and want to challenge the outcome you should get advice immediately rather than waiting.
Is there a default penalty if no penalty is stated for an offence?
Yes. Under section 164A of the Road Traffic Act 1961 (SA), where an offence is created but no specific penalty is set out, the default maximum is a fine of up to $2,500. The Magistrates Court handles summary offences and can also impose licence disqualification where the law allows.
Where can I get free help with a traffic matter in SA?
The Legal Services Commission of South Australia runs a free Legal Help Line on 1300 366 424 and publishes fact sheets at lsc.sa.gov.au. It provides general information and brief advice; grants of aid are limited and means-tested, generally reserved for matters where imprisonment is a real risk. For serious matters that do not qualify, a fixed-fee consultation with an admitted lawyer is often the clearest next step.
For general information about Traffic Law in Australia, visit our Traffic Law Legal Hotline Australia page.