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Is it okay to drive well below the speed limit on a main road?

695 replies

ScarboroughFairy · 01/02/2026 23:38

Hi all, tomorrow I’ll be driving on a main road where the speed limit is 60mph, but I’m thinking of sticking to 40mph. I know it’s well under the limit, but I just feel safer at that speed. Does anyone else do this

OP posts:
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6
Willowywisp · 02/02/2026 11:02

Happyjoe · 02/02/2026 09:41

Speed limit isn't a minimum to be reached, but saying that, if doing 40mph it would be better to change your route to roads that are that kind of speed limit. You will cause frustration from other drivers and that can cause people doing dangerous things.

I get giddy driving too fast now, something's going on with my health, and 40mph is about my max. Am absolutely fine and dandy under that and feel well. I wouldn't dream of entering a national speed limit road.

There are no roads connecting the Highlands and Central Belt that are 40mph limit roads.

EleanorReally · 02/02/2026 11:02

Silvers11 · 02/02/2026 10:47

Lol! Tell me you've never driven on the A9 without telling me you've never driven on the A9!

oh you are very funny
and so superior

Willowywisp · 02/02/2026 11:03

XelaM · 02/02/2026 09:42

This. Sometimes it's absolute madness to drive 60 mph on one of those awful country lanes and definitely much more dangerous to speed than to go at a sensible speed like 40 mph. A speed limit is just the upper limit, not the speed you must drive.

Edited

This is not a country lane, it's the A9! The arterial trunk road from North to South Scotland. Can nobody read?

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GasPanic · 02/02/2026 11:03

No, it isn't.

The whole point of a road is to get people from A to B in a timely and safe manner.

If your actions are impeding either of those objectives then you are not using the road correctly.

Mangelwurzelfortea · 02/02/2026 11:05

40-mile-an-hour drivers are among my pet peeves. Crawling along on A roads holding up everyone else - and then they don't slow down to 30mph when they go into a residential area and the speed limit changes. Just stick to that 'safe' 40 mph at all times. I live near the A40 where there are loads of fatal car accidents. Go figure. Loads of 40mph drivers around here, unfortunately.

TheGoddessAthena · 02/02/2026 11:06

EleanorReally · 02/02/2026 11:02

oh you are very funny
and so superior

Edited

And so correct.

Willowywisp · 02/02/2026 11:07

XelaM · 02/02/2026 09:50

Absolute rubbish that doing 40mph on 60mph road is more dangerous than speeding. It's complete nonsense. I drive for over 20 years (including horse lorries across Europe) and it's ALWAYS more dangerous to speed. Going 60mph on narrow winding country lanes when incoming traffic can barely get past safely, is just madness and the cause of many accidents.

We're not talking about a narrow country lane, the A9 is a trunk road. Police Scotland will tell you that people driving too slowly on the A9 are absolutely the cause of a lot of accidents. That's why they treat it seriously if you are crawling along like a snail.

EleanorReally · 02/02/2026 11:09

Silvers11 · 02/02/2026 10:47

Lol! Tell me you've never driven on the A9 without telling me you've never driven on the A9!

she did say A 90 for a start and where there are A roads there are B roads but tell me you are a knowitall without telling me!

SteelMaiden · 02/02/2026 11:09

AlcoholicAntibiotic · 01/02/2026 23:44

If you aren’t confident about driving at the speed limit where it is safe to do so, then you shouldn’t really be driving at all.

I agree with this!

TheMostHolySunflower · 02/02/2026 11:09

Alpacajigsaw · 01/02/2026 23:57

Mind you, what annoys me more than people doing 40 in a 60 is when the road drops to a 30 and they still drive at 40 instead of slowing down

Haha I've noticed drivers who seem to be stuck at 40mph in all situations too 😂 they annoy the hell out of me!

Willowywisp · 02/02/2026 11:09

explanationplease · 02/02/2026 09:51

You should probably never drive at the speed limit on single track windy roads. I hardly ever would , and I’m a very confident driver. It’s foolhardy.

Why are you all slabbering on about single track, country roads? We've plenty of them and know very well the difference between that and the main trunk road!

EleanorReally · 02/02/2026 11:09

TheGoddessAthena · 02/02/2026 11:06

And so correct.

we are not all familiar with the A90 you know?
tell me how ignorant you are without telling me

Scottishdriver · 02/02/2026 11:10

OP I am responding to a post for the first time ever as I am so concerned by your post.

you should not be driving from Inverness to Edinburgh by yourself if you are so anxious that you are considering setting an arbitrary speed for yourself. You must drive to the road conditions. Many others have pointed out the potential issues with driving too slow.

Re the specific route, this is a 3 hr journey. If you drive at 40mph max it will take you much much longer. Increasing your tiredness and potentially affecting your concentration. This is especially an issue if you are driving in a state of high anxiety which would be exhausting.

Also the A9 doesn’t go to Edinburgh. You will need to navigate major roundabouts round Perth and join the dual carriageway A90/M90 for the rest of the journey.

id strongly advise you get a bus. City link have options which would be quicker and probably similar in price to the cost of petrol.

then you should arrange advanced driving lessons before any future attempts to drive outwith your local area.

TheGoddessAthena · 02/02/2026 11:12

EleanorReally · 02/02/2026 11:09

she did say A 90 for a start and where there are A roads there are B roads but tell me you are a knowitall without telling me!

What does that even mean - where there are A roads there are B roads? This is a very rural part of the country with high mountain passes at Slochd and Drumochter and the "diversion" route would potentially double the length of your journey. Or more.

Grammarninja · 02/02/2026 11:13

You'd fail a driving test for driving that far under the speed limit. It's called 'failing to progress'. Slow drivers cause people to overtake which is dangerous and can lead to accidents.

EleanorReally · 02/02/2026 11:13

if i dont want the A road, i take the B road - try that op

Mochudubh · 02/02/2026 11:14

@Willowywisp
I've given you an "agree" for "Don't talk pish" alone.

There's a lot of posters on this thread who should take 2 minutes to look at a map. Just what alternative route to the big fucking line right up the middle of Scotland do they suggest?

Scottishdriver · 02/02/2026 11:14

EleanorReally · 02/02/2026 11:13

if i dont want the A road, i take the B road - try that op

That isn’t an option. Scotland is mainly mountains between Inverness and Perth. There is basically one road. The A9.

TheGoddessAthena · 02/02/2026 11:15

EleanorReally · 02/02/2026 11:09

we are not all familiar with the A90 you know?
tell me how ignorant you are without telling me

So if you are not familiar with the road or the geography, why do you feel the need to comment? It's like me wading in on a thread about cricket in Somerset or roads in Suffolk - things I know nothing about so therefore my opinion adds nothing.

Mangelwurzelfortea · 02/02/2026 11:15

EleanorReally · 02/02/2026 11:13

if i dont want the A road, i take the B road - try that op

B roads are potentially worse - they're still national speed limit but with less room for overtaking and a nervous driver like the OP isn't going to like a trail of angry tailgaters directly behind them.

EleanorReally · 02/02/2026 11:15

Scottishdriver · 02/02/2026 11:14

That isn’t an option. Scotland is mainly mountains between Inverness and Perth. There is basically one road. The A9.

why did the op call it A90?

Scottishdriver · 02/02/2026 11:16

EleanorReally · 02/02/2026 11:15

why did the op call it A90?

Both roads are required to get between Inverness and Edinburgh.

EleanorReally · 02/02/2026 11:16

Mangelwurzelfortea · 02/02/2026 11:15

B roads are potentially worse - they're still national speed limit but with less room for overtaking and a nervous driver like the OP isn't going to like a trail of angry tailgaters directly behind them.

sounds like she will get angry tailgaters either way she goes

EmotionalSupportVest · 02/02/2026 11:16

Dear me. There aren't B road options that will take her less than a day.

It isn't a windy wee country road. It is a main trunk road. It's like someone announcing they want to drive at 50mph on the M6.

Perhaps @ScarboroughFairy or @mumsnet could change the title to include A9 to prevent further wittering on about country roads...

TheGoddessAthena · 02/02/2026 11:18

To be fair, the OP does say "main road". Which it is. She clearly knows the route. Unlike the posters wanging on about country lanes and B roads who have no clue.