Motorhome Speed Limits in the UK: The 3,050kg Rule Explained
Motorhome speed limits catch out a lot of drivers. Many people assume a motorhome follows car limits, and plenty do. Many heavier motorhomes don't, though, and the deciding figure isn't the one most people check.
It's the unladen weight that counts
UK speed limits for motorhomes depend on the vehicle's unladen weight: what it weighs empty, with no passengers, water, fuel or luggage. The threshold is 3,050kg.
That's a different figure from the 3,500kg MAM that decides your licence category. A motorhome can be plated at 3,500kg, be fine on a car licence, and still have an unladen weight that puts it on the lower speed limits.
Unladen weight 3,050kg or less
You follow the same limits as a car:
Built-up areas: 30mph unless signed otherwise
Single carriageways: 60mph
Dual carriageways: 70mph
Motorways: 70mph
Unladen weight over 3,050kg
Lower limits apply outside built-up areas:
Built-up areas: 30mph unless signed otherwise
Single carriageways: 50mph
Dual carriageways: 60mph
Motorways: 70mph
The 50mph limit on single carriageways is the one that catches most people out. It applies on the national speed limit roads that make up most of rural Scotland, including much of the NC500.
How do I find my unladen weight?
This is where it gets awkward. The unladen weight isn't printed on the V5C, and it isn't the same as MIRO (mass in running order), which includes things like fuel and a driver allowance. Your best sources are:
The manufacturer's or converter's technical data for your exact model
Your dealer, who can request it for you
A weighbridge with the vehicle completely empty, as a rough guide
If you can't confirm it's at or below 3,050kg, the safe choice is to drive to the lower limits.
Towing a car or trailer?
Towing brings lower limits again, and there are extra rules on which motorway lanes you can use. If you're planning to tow a car or trailer behind your motorhome, check the current GOV.UK guidance before you set off.
Driving abroad
Each European country sets its own limits for motorhomes, and many have lower limits for vehicles over 3,500kg. Check the rules for every country on your route before you go.
Drive it with confidence
Knowing your limits is one part of it. The other is being comfortable keeping a big vehicle steady at speed, judging gaps when you pull out, and letting faster traffic past on narrow roads. That's exactly what we cover in our practical lessons.
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