Most theory test mistakes are not about obscure rules. They come from a handful of rules that sound like common sense but work differently in the UAE, or that people half-remember. Each section below explains one of them in plain words, the mistake learners usually make and where to practise it. Everything is based on the Light Vehicle Handbook.
1. Who gives way at a roundabout
Every vehicle approaching a roundabout gives way to the vehicles already on it. Keep the same lane before, during and after the roundabout: use the right lane to turn right, and move to the left lane before you enter to turn left. Signal right to show you are leaving.
The usual mistake: Thinking that cars on the roundabout must let entering cars in, or that you should drift to the inner lane once you are on it.
Try it: Who gives way at a roundabout? · Choosing your roundabout lane · all Inside the city limits questions
2. Priority at junctions with no lights or signs
Where a junction has no lights, signs or markings, the vehicle approaching from your left has priority. This is the Left Hand Rule, and it applies in car parks too. A Give Way or Stop sign overrides it.
Joining a main road, you give way to traffic from both directions. Leaving a car park or a petrol station, you give way to everyone. Turning left, you give way to oncoming traffic and to pedestrians.
The usual mistake: Assuming the car on the wider road, or the car that is turning, has priority.
Try it: The Left Hand Rule at a crossroads · Joining a main road · Leaving a car park · all Rules of the Road questions
3. Police, lights, signs: which one wins
The order of precedence is a police officer first, then traffic lights, then traffic signs, then the general rules of the road. If an officer signals you to stop on a green light, you stop.
A continuously flashing amber light does not control traffic at all. It is a warning, so the signs at the junction, or the normal rules, decide who goes. A steady amber means stop, if you can do so safely.
The usual mistake: Treating a flashing amber as permission to drive on, or a green light as more important than a police officer.
Try it: Order of precedence · What flashing amber means · all Order of traffic precedence questions
4. Following distance: three seconds, not car lengths
Use the three-second rule. When the car ahead passes a fixed point, count three seconds. If you reach the point before you finish, you are too close. On motorways, leave at least one metre for every km/h of speed, and at least two chevrons where they are painted on the road.
If someone is tailgating you, slow down slightly so the gap in front of you grows. That gives you, and the driver behind, more time to react.
The usual mistake: Using a fixed number of car lengths at every speed, or speeding up to get away from a tailgater.
Try it: The three-second rule · Distance on motorways · all Outside city limits questions
5. Maximum and minimum speed signs
The maximum speed on the major roads of the UAE is 140 km/h. Inside cities the limit is usually 80 km/h, and outside built-up areas the standard limit is 100 km/h. Always follow the signs on the road you are on.
A number in a red-bordered circle is a maximum, and it applies until another sign changes it. A number in a blue circle is a mandatory minimum speed.
The usual mistake: Reading a blue circular speed sign as a maximum.
Try it: Speed limits · The blue minimum-speed sign · all Outside city limits questions
6. Overtaking, and passing on the right
You overtake on the left, moving out with your left indicator and coming back in with your right one. Passing on the right is allowed in two cases: in congested traffic where the right lane is moving, and past a vehicle that has clearly signalled a left turn.
Do not start an overtake unless you can move back into the right-hand lane safely afterwards.
The usual mistake: Believing you can never pass on the right, or signalling right to start an overtake.
Try it: Passing on the right · Which indicator to use · all Lanes questions
7. The motorway left lane, and missed exits
The left lane on a motorway is for overtaking. It is not a fast lane to stay in, so move back right as soon as it is safe. Staying there forces faster drivers to overtake on the wrong side.
If you miss your exit, carry on to the next one. Stopping, reversing and U-turns are all prohibited on a motorway, and the hard shoulder is not an exit road.
The usual mistake: Staying in the left lane because you are driving fast, or reversing or turning back after a missed exit.
Try it: What the left lane is for · If you miss your exit · all Driving on motorways questions
8. No Parking is not the same as No Stopping
Under a No Parking sign you may still stop briefly to pick up or set down passengers or goods, without unnecessary delay. Under a No Stopping sign you may not stop at all.
Stopping and waiting is prohibited within 15 metres of a junction, a crossing or a pedestrian crossing, and you must not park alongside another parked vehicle.
The usual mistake: Treating the two signs as the same, or remembering the junction distance as 10 metres.
Try it: No Parking vs No Stopping · The 15-metre rule · all Stopping, parking and turning questions
9. Pedestrian crossings
A crossing only counts as controlled when a police officer or a traffic light controls it. Every other crossing is uncontrolled, even one with a flashing amber signal, and there you must give way to pedestrians who have stepped out or are about to.
When you turn at a junction and the pedestrian light is green, the pedestrians crossing have priority. Never overtake at a pedestrian crossing.
The usual mistake: Thinking a flashing amber makes a crossing controlled, or that whoever arrives first may go.
Try it: Controlled and uncontrolled crossings · Turning across a green pedestrian light · all Give Way and Crossing rules questions
10. Hazard lights and flashing headlights
Hazard lights are for emergencies and accidents. In a sudden traffic jam you may use them very briefly to warn the driver behind. They must not be used while driving in heavy rain.
Flashing your headlights means the same as sounding the horn: it is a warning and nothing more. It does not mean "go ahead", so never take it as an invitation to pull out.
The usual mistake: Switching on hazard lights to be more visible in heavy rain, or reading a headlight flash as the other driver giving way.
Try it: When to use hazard lights · Hazard lights in heavy rain · all Giving and receiving signs and signals questions
11. Emergency vehicles and convoys
When an emergency vehicle needs to pass, slow down, pull over to the side and stop completely if you have to. You must also give priority to military convoys, official convoys and rescue convoys.
Alternately flashing blue and red lights from a police car behind you are an order to pull over and stop immediately.
The usual mistake: Holding your lane and speed, or braking hard where you are.
Try it: Making way for an emergency vehicle · Convoys · all Exceptions to the rules questions
12. Mobile phones
Federal law forbids using a mobile phone while driving unless it is hands-free. Hands-free is less risky but still not advisable: if a call comes in, stop somewhere safe and call back, and never read or type a message while driving.
The same goes for anything that takes your eyes off the road: stop before making complicated changes to a GPS or music player.
The usual mistake: Thinking it is fine to use the phone while waiting at a red light.
Try it: Phones and the law · Adjusting a GPS · all Distractions while driving questions
Next steps
Once these feel natural, take a timed mock exam and read the explanation for every question you get wrong. The road signs page covers all 153 signs, including the speed and parking signs above.