NumbersKey quantities to keep in mind. If viewing on a smartphone, use this instead.
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1.6 mm, over centre ¾
100 m 2 sec (4 sec) Width of a tyre (½ a drain) 1.5 m ½ a car's length 1 car's length 1-2 car lengths 2 car lengths 3 (or 5) car lengths 3-4 car lengths 6-8 car lengths 8-10 car lengths 60 / 70 mph 200 yds (= 183 m) 3, and 1/3 3-6 / second 6 sec 75% / 25% 80 / 15 / 5 ¾ 75 / 20 / 5 25% |
Minimum legal tread depth on every tyre
Minimum distance visible ahead without legally driving with rear foglights on Safe gap when following another car (double if wet) ... & know how to measure it ! Parking distance from the kerb Distance from kerb or when passing a parked car (i.e. the Normal Driving Position) Safe gap when waiting behind another car in a traffic queue Starting position beyond a left-hand corner you're about to reverse around Distance behind parked car in which to complete the parallel park manoeuvre Distance from a "closed" (blind) T-junction at which to change down to 1st gear Distance to drive into new road after reversing round a left- (or right-) hand corner Distance from T-junction to decide if view is "Open" or "Closed" Distance from a junction at which to signal Left or Right, if necessary Distance from a junction at which to check Centre and Left or Right door mirror National speed limit for cars on single- / dual-carriageway Min. spacing of streetlamps to define 30 mph zone without need for repeater signs Number of lines from bay to reverse into, and where "line 3" is at point of turn Rate of assessments (of features/circumstances) or decision-making while driving Maximum duration for holding car at the biting point When reversing, split between time observing through rear windscreen / around Rough proportions of junctions safely navigated in Gear 2 / Gear 1 / Gear 3 Fraction of questions I ask, to which "check centre mirror" is the correct answer Rough proportions of driving info that comes from seeing / hearing / feeling Fraction of folk who WON'T find driving comes naturally (!) |