Single-lane roundabout
Four arms, one lane round. Give way to traffic coming from your right, and take the exit you counted on the way in.
The rule, and the clock
Give way to the right, and do not enter unless the gap is genuinely there. For the exit, picture a clock face: anything before twelve is a left turn: left lane, left signal on approach. Twelve o'clock is straight ahead, so no signal on approach. Past twelve is a right turn: right lane, right signal, and you change to a left signal once you have passed the exit before yours.
Both mistakes are marked
Going too early is only half of it. Waiting when the gap was there is marked here as well: the marking sheet has a box called Progress – undue hesitation, and sitting at a clear roundabout fills it. Four seconds of a usable gap is a driver fault here, nine is serious.
The traffic is the same every time
Every scenario runs from a fixed seed at a fixed timestep, so the cars arrive in the same order at the same speeds on every attempt. You can practise one decision until it is automatic instead of re-learning a new junction each run.
Common questions
Do I have to signal on the way in?
Left before a left exit, right before a right exit, nothing for straight ahead. Every exit gets a left signal on the way out, once you have passed the exit before yours.
Do I always have to stop?
No. Give way means give way, not stop. If the roundabout is clear as you arrive, keep moving: stopping at an empty roundabout is marked.
The rest of the set
- Three-arm roundaboutThree arms in a T. From the side road the second exit is a right turn, so it needs a right signal.
- Mini roundaboutPainted island, same priority rules, and you still have to go round it.
- Double mini roundaboutTwo minis, one after the other. Each is its own give way. Read them one at a time.
- Two-lane roundaboutTwo lanes round, spiral arrows on the road. Right lane and a right signal for the third exit.
- Signal-controlled roundaboutLights on every arm. Green gets you to the line: you still give way to the roundabout.
- City gyratorySix arms, two lanes, uneven spacing. One arm only joins and one only leaves. Count carefully.
- Magic roundaboutFive minis around a ring that runs the other way. Read them one at a time and it is just five give ways.
Also included: the manoeuvre simulator and the 3D drives of the routes around your own test centre.