Can I Drive 56 Hours Two Weeks in a Row?
No — 56 hours is the single-week maximum, but the fortnight cap is 90 hours. So a 56-hour week must be followed by no more than 34 hours' driving.
No — you cannot drive 56 hours in two consecutive weeks. 56 hours is the maximum for a single fixed week, but a separate limit caps your driving at 90 hours across any two consecutive fixed weeks. Two 56-hour weeks would total 112 hours, well over the fortnight limit, so a 56-hour week must be followed (or preceded) by a week of no more than 34 hours' driving.
The two limits working together
GOV.UK's assimilated drivers' hours guidance sets a weekly driving limit of 56 hours and a fortnightly limit of 90 hours "in any 2 consecutive weeks." These aren't alternatives — you have to satisfy both at once. The weekly figure limits any one fixed week; the fortnightly figure limits each pair of consecutive weeks. Because 90 minus 56 is 34, the arithmetic is unavoidable: if one week is 56, the week beside it can be at most 34.
It's a rolling pair, not a fresh fortnight
A common misreading is that the 90 hours resets every two weeks, so you could do 56 + 34, then 56 + 34 again. In practice the 90-hour limit applies to any two consecutive fixed weeks, so each week is tested against the one before and the one after. A 56-hour week sitting between two other weeks constrains both of its neighbours. Plan a big week and you've committed its neighbour to a lighter one, whichever side it falls.
A worked example
Week 1: you drive 56 hours — legal on the weekly limit, and you've used both your 10-hour days getting there. Week 2: you can now drive at most 34 hours, because 56 + 34 = 90. If you drove 40 in week 2, the fortnight total would be 96 — a 6-hour breach of the 90-hour limit, recorded on your tacho and open to a graduated fixed penalty. The infringement is on the fortnight, even though each week looked fine on its own weekly limit.
What to do
Never plan two heavy weeks side by side. If you know a 56-hour week is coming, book the neighbouring week light — the constraint is real and easy to trip over because each week can look compliant alone. The free drivers' hours calculator tracks the fortnight as well as the week, so you can see the 90-hour limit closing in, and the UK drivers' hours limits set out all the driving limits together. For operators building rotas that respect the fortnight across a whole fleet, that forward planning is exactly what HaulGuard's compliance system helps evidence.