4.1 The Prescribed Alcohol Limit and Breath Testing

4.1 The Prescribed Alcohol Limit and Breath Testing

Quick Answer: Under the Guyana Police Force Learner/Driver Theoretical Programme, you shall not drive, attempt to drive, or be in charge of a motor vehicle on a road or other public place if the alcohol in your breath or blood exceeds the prescribed limit. The programme teaches that limit as two beers or 35 microgrammes of alcohol in breath. GPF-linked teaching treats that breath figure as equivalent to 80 milligrammes of alcohol in 100 millilitres of blood (0.08% BAC). A breathalyser reading over the legal limit is the test that triggers the programme's first-offence fine. A police officer may stop you for erratic driving, weaving in and out of lanes, or excessive speeding.

Alcohol is not a private choice once you sit behind the wheel in Guyana. The April 2025 Learner/Driver Theoretical Programme — issued by the Guyana Police Force, Traffic Headquarters, Eve Leary — opens its drink-drive material with a public-education poster and then states the legal rule candidates are expected to know for the electronic multiple-choice sitting. This independent study of that package (and of Cap. 51:02 where the booklet abridges it) is what the rest of this chapter uses.

The three-limb prohibition

The programme states the offence in one sentence you should be able to recite:

A person shall not drive or attempt to drive or be in charge of a motor vehicle on a road or other public place if he has consumed alcohol in such a quantity that the proportion in his breath or blood exceeds the prescribed limit.

Memorise the three verbs. The theoretical exam is not only about a car that is already moving.

1. Drive — you are operating the vehicle on the road: along a Georgetown street, the East Bank, the East Coast, Bartica, or any other public road, including bridges such as the Demerara Harbour Bridge or the Canje Bridge.
2. Attempt to drive — you try to set the vehicle in motion. Finding the keys, starting the engine, releasing the handbrake, and rolling off the kerb are still inside the offence even if you barely leave the parking space.
3. Be in charge — you have control of the vehicle even if it is not yet rolling. Sitting in the driver's seat on a road or other public place with the means to drive can be enough. "I was only parked outside a shop" is not a defence if you are in charge and over the limit.

The location is equally wide: a road or other public place. A car park, compound entrance, or other place the public uses can still count. Do not treat the rule as applying only on named highways such as the Soesdyke–Linden Highway.

The substance of the offence is the proportion of alcohol in breath or blood, not how sober you feel, not how many miles you still have to go, and not whether you think you "drive better after a drink."

Why "in charge" matters for learners

A provisional holder practising with L plates still drives a motor vehicle. If that learner is over the limit, the offence is complete whether the accompanying supervisor is giving instructions or not. The supervisor's presence does not cancel the alcohol rule. (The supervisor also has a separate hand-held phone ban under section 37A, covered in 4.3.)

The prescribed limit the programme expects you to know

The programme states the prescribed limit as two beers or 35 microgrammes of alcohol. In GPF teaching that 35-microgramme figure is a breath limit. The matching blood figure used in GPF-linked teaching is 80 milligrammes of alcohol in 100 millilitres of blood, which is 0.08% BAC.

Treat "two beers" as the booklet's teaching example, not a laboratory promise. Beers are not identical. A small lager and a large high-alcohol brew are not the same drink. Body weight, food in the stomach, time since the last drink, and fatigue all change how alcohol appears in breath and blood. The legal test is the measured proportion, not your count of bottles at a rum shop or a party in Georgetown.

If a question gives both the programme phrase and the numbers, prefer the numbers: 35 microgrammes (breath) and 80 mg/100 ml blood (0.08% BAC). If a question uses only the programme wording, two beers or 35 microgrammes of alcohol is the answer the booklet printed.

Breath and blood are alternative measures of the same limit

The programme says the proportion in breath or blood must not exceed the prescribed limit. You do not get two separate allowances. A driver who is under one measure and over the other is still over. In roadside practice the device you will meet first is the breathalyser; a laboratory blood figure of 80 mg/100 ml is the matching teaching equivalent, not a second, more generous cap.

Breath testing in practice

The programme is operational, not academic: If you are stopped, given a breathalyser test, and it registers over the legal limit, you will be subject to a fine of $7,500.00. That first-offence fine is the figure to lock for this section. What happens after a first conviction — including how the poster and the body text describe disqualification — is the subject of section 4.2.

A breathalyser measures alcohol in expired air. The programme's 35-microgramme breath limit is the number that device is checking. You do not get to argue that you "only had two beers" if the device is over the legal limit. The device reading is what the booklet tells you will trigger the fine.

Grounds a police officer may use to stop you

The programme lists the driving that can bring an officer onto you. It does not confine stops to published checkpoints, to night hours, or to the aftermath of a collision.

• Erratic driving — speed and position that do not match the road: sudden slowing on a clear East Coast stretch, unexplained stops, or wandering within the lane.
• Weaving in and out of lanes — Guyana is left-hand traffic. You keep left (the near side) and overtake on the right (the off side). Weaving across lanes on a two-way road, or drifting over the centre line toward oncoming traffic, is exactly the pattern the booklet names.
• Excessive speeding — well above the posted limit, whether that is a restricted Georgetown road or a highway with a posted maximum. Posted signs take precedence; alcohol does not create an extra speed allowance.

Sunday midnight to 2:00 a.m. is a high-risk window the defensive-driving material flags because alcohol-impaired drivers mix with other traffic — but the stop powers in this chapter are the three driving patterns above, at any hour, on any road or other public place.

Alcohol also lengthens thinking distance. The Guyana Road Traffic Code's thinking-distance table assumes an alert driver (20 mph → 20 feet of thinking distance, and so on). Fatigue plus alcohol stretches reaction time, so the same 40 mph can need far more than 40 feet of thinking distance before the brakes even come on. That is why "I felt fine" is a dangerous exam trap as well as a dangerous road decision.

Drugs and the same control test

The chapter title includes drugs because impairment is not alcohol-only. Cap. 51:02 also punishes a person who, when driving, attempting to drive, or in charge of a motor vehicle, is under the influence of drink or a drug to such an extent as to be incapable of having proper control of the vehicle. That impairment offence is separate from the programme's prescribed-limit offence. The GPF package does not print a cannabis, cough-mixture, or prescription-tablet equivalent of "two beers." If a drug — prescribed or not — leaves you unable to control the vehicle, you must not drive. Combining alcohol with medication is not a loophole; it is a faster way to lose control on a left-hand-traffic road where oncoming vehicles occupy the right-hand half.

When the Home Affairs consolidation of the Act and the GPF booklet speak in different voices, learn both: the theoretical sitting is derived largely from the study package, and the Act remains the statute. For prescribed-limit questions, use the programme's two beers / 35 microgrammes / breathalyser path. For "incapable of proper control" questions, remember that drink or a drug can found that separate offence even where no milligramme figure is quoted.

Exam traps

• The prohibition is drive / attempt to drive / be in charge, not drive-only.
• The place is a road or other public place, not highways only.
• The programme limit is two beers or 35 microgrammes, with blood 80 mg/100 ml (0.08% BAC).
• A breathalyser over the legal limit is enough for the programme's first-offence fine path.
• Stops may follow erratic driving, weaving, or excessive speeding — not only collisions.