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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Was I U to do this?

74 replies

FloofyBird · 16/07/2025 16:13

I was on the dual carriageway pootling up the inside lane at 70. I pulled out to overtake a lorry, then pulled back in again once I'd safely passed. The carriageway seemed busy, but once I was in the outside lane and could see past the lorry it wasn't actually that busy, it was just that the outside lane was snarled up with lots of cars whilst the inside lane was virtually empty. Once I pulled back in I proceeded to drive at 70 in the inside lane and 'undertook' a good half dozen/8 cars just sat in the outside lane for no real reason. The next vehicle to overtake was quite a way ahead and by the time I caught up with them I had plenty of room to pull out and overtake as the outside lane hoggers were miles behind me (not literally but a fair way behind).

I mean it's probably unfair to call them all lane hoggers, it was probably just the person at the front in the outside lane for no reason, driving slowly and then everyone gets stuck behind them.

My friend says I was reckless and it was undertaking, I say it's not if the outside lane is moving slower than the inside lane as I didn't pull out into the outside lane as soon as I'd passed/undertook them and stayed on the inside lane until there was a vehicle in the inside lane I wanted to overtake. But maybe I'm fooling myself because I've just got fed up of lane hoggers causing unnecessary tailbacks and didn't have the patience for it today?!

OP posts:
Swiftie1878 · 16/07/2025 18:50

Coconutter24 · 16/07/2025 18:05

The outside lane was going slower so in this case it’s ok to undertake.

No, that’s the point. It’s not OK at all.

Swiftie1878 · 16/07/2025 18:52

StMarie4me · 16/07/2025 18:05

If your lane is moving faster that’s not undertaking. The fault lies with the other drivers.

It is undertaking, and it is not allowed except in cases where both/all lanes are queuing.
Yes, the outside lane drivers are frustrating, but not breaking the law.

Fitzcarraldo353 · 16/07/2025 18:56

Catladywithoutacat · 16/07/2025 18:14

Op it’s slow lane, middle lane and fast lane. I don’t know what you’re on about describing it as you’re

She says it at the start of the OP. She was on a dual carriageway.

Coconutter24 · 16/07/2025 19:06

Catladywithoutacat · 16/07/2025 18:14

Op it’s slow lane, middle lane and fast lane. I don’t know what you’re on about describing it as you’re

A dual carriage way only has two lanes not the three you described. There is also no such thing as a slow lane, middle lane and fast lane

cyvguhb · 16/07/2025 19:14

Venalopolos · 16/07/2025 16:52

They weren’t observing the rules of the road, the rules are to stay left unless overtaking. Why weren’t they staying left?

Do you drive much on motorways? They are full of idiot drivers who go too slowly in lane 2. Who knows why, all kinds of different reasons I'm sure

bridgetreilly · 17/07/2025 09:08

Coconutter24 · 16/07/2025 19:06

A dual carriage way only has two lanes not the three you described. There is also no such thing as a slow lane, middle lane and fast lane

Nope. A dual carriageway has a central reservation. It can have any number of lanes on either side of that.

Absentmindedsmile · 17/07/2025 09:10

No it wasn’t ok. Undertaking is extremely dangerous. The fact more people on this thread don’t understand that, is crazy. But it does explain a lot.

AnotherNewName456 · 17/07/2025 09:23

Absentmindedsmile · 17/07/2025 09:10

No it wasn’t ok. Undertaking is extremely dangerous. The fact more people on this thread don’t understand that, is crazy. But it does explain a lot.

Edited

Agree entirely

SunsetCocktails · 17/07/2025 09:43

The pp who quoted Yorkshire police is perfectly right. It’s not undertaking if the left lane is going faster than the right. The person actually in the wrong is the one in the right lane who’s driving too slowly for the road speed and should have moved back into the left lane. It’s only undertaking if OP deliberately moved into the left lane to get ahead of the slower moving vehicles then immediately pulled back out into the right lane after passing.

SunsetCocktails · 17/07/2025 09:51

Just going to add, l live right near a very busy dual carriageway and drive it regularly. The number of people pootling along in the outside lane at 45-50 mph while the inside lane is doing the correct speed of 60-70 is ridiculous.
Unless there are specific conditions, ie the road is wet/icy, visibility is poor, or there are traffic issues ahead, you should ALWAYS drive to the speed limit. Driving too slowly is dangerous to other road users and can actually lead to prosecution in some cases. If you’re not comfortable driving at the speed limit you shouldn’t be driving frankly.

Didshejustsaythatoutloud · 17/07/2025 10:10

ComeTheMoment · 16/07/2025 17:43

You say you were pootling at 70 in the inside lane but you haven't said what the speed limit was

Yeah, I wouldn't call 70, pootling 😂

Bellaphant · 17/07/2025 13:48

I commute on a road like this. What you often get is a lorry trying to overtake another lorry, so a queue In the outside lane. Often, you can't get into the outside lane safely for ages, so end up passing those cars. By the time you are behind the lorry, the other lorry has finally passed and the queue is moving and you can overtake. Is that really considered undertaking?

Coconutter24 · 17/07/2025 13:49

bridgetreilly · 17/07/2025 09:08

Nope. A dual carriageway has a central reservation. It can have any number of lanes on either side of that.

My point was it doesn’t have the three lanes the poster described… slow lane middle lane and fast lane

SusanChurchouse · 17/07/2025 13:58

No such thing as slow lane. The speed limit is the same in all lanes. Calling the left hand lane the slow lane is the reason many people middle lane hog: because they erroneously believe the left lane is for ‘slow’ driving, whatever that means, rather than for normal driving up to the speed limit.

Createausername1970 · 17/07/2025 14:45

bridgetreilly · 17/07/2025 09:08

Nope. A dual carriageway has a central reservation. It can have any number of lanes on either side of that.

Indeed! I did a speed awareness course a few months ago and if I am remembering correctly, a dual carriageway is a road that has a solid central reservation that divideds the traffic.

The carriageway is the whole road, so if it has a solid central reservation then there are two (dual) separate carriageways. No solid central reservation, just a white line, then that's a single carriageway.

There can be a varying number of lanes on each carriageway, including only one.

Who knew 😁

DappledThings · 17/07/2025 14:49

Coconutter24 · 16/07/2025 19:06

A dual carriage way only has two lanes not the three you described. There is also no such thing as a slow lane, middle lane and fast lane

A dual carriageway can have any number of lanes. 1, 2, 3 or 4.

Coconutter24 · 17/07/2025 15:03

DappledThings · 17/07/2025 14:49

A dual carriageway can have any number of lanes. 1, 2, 3 or 4.

I know, my point was that they are not described as the three the poster called them

bridgetreilly · 17/07/2025 17:27

Coconutter24 · 17/07/2025 13:49

My point was it doesn’t have the three lanes the poster described… slow lane middle lane and fast lane

It can.

Coconutter24 · 17/07/2025 19:47

bridgetreilly · 17/07/2025 17:27

It can.

Slow lane middle lane and fast lane are not a thing. You have lane 1,2 or 3 etc

Devonmaid1844 · 17/07/2025 20:09

Clearly undertaking, wrong, illegal and dangerous. Even if it is annoying having to sit in the outside lane to wait for someone to realise they're in the wrong lane. And to be honest if they're that unaware of their speed surely more of a risk to undertake them as they wouldn't expect a car to be speeding up their left hand side

Devonmaid1844 · 17/07/2025 20:10

Bellaphant · 17/07/2025 13:48

I commute on a road like this. What you often get is a lorry trying to overtake another lorry, so a queue In the outside lane. Often, you can't get into the outside lane safely for ages, so end up passing those cars. By the time you are behind the lorry, the other lorry has finally passed and the queue is moving and you can overtake. Is that really considered undertaking?

Yes - people aren't expecting someone to be speeding up the left hand side and you have less visibility and a larger blind spot. If someone pulls in they're much more likely to hit you

SaulHudsonDavidJones · 17/07/2025 20:11

Definitely something I would do, and do do.

TiptoeThroughTheToadstools · 17/07/2025 20:11

FloofyBird · 16/07/2025 16:13

I was on the dual carriageway pootling up the inside lane at 70. I pulled out to overtake a lorry, then pulled back in again once I'd safely passed. The carriageway seemed busy, but once I was in the outside lane and could see past the lorry it wasn't actually that busy, it was just that the outside lane was snarled up with lots of cars whilst the inside lane was virtually empty. Once I pulled back in I proceeded to drive at 70 in the inside lane and 'undertook' a good half dozen/8 cars just sat in the outside lane for no real reason. The next vehicle to overtake was quite a way ahead and by the time I caught up with them I had plenty of room to pull out and overtake as the outside lane hoggers were miles behind me (not literally but a fair way behind).

I mean it's probably unfair to call them all lane hoggers, it was probably just the person at the front in the outside lane for no reason, driving slowly and then everyone gets stuck behind them.

My friend says I was reckless and it was undertaking, I say it's not if the outside lane is moving slower than the inside lane as I didn't pull out into the outside lane as soon as I'd passed/undertook them and stayed on the inside lane until there was a vehicle in the inside lane I wanted to overtake. But maybe I'm fooling myself because I've just got fed up of lane hoggers causing unnecessary tailbacks and didn't have the patience for it today?!

You didnt do anything wrong!

SaulHudsonDavidJones · 17/07/2025 20:13

And to clarify, I would drive in the faster lane, even if it’s the near side one. But I wouldn’t use it just to undertake people, weaving in and out of traffic. I’d be extra vigilant too.

MaryBeardsShoes · 17/07/2025 20:15

You weren’t undertaking! You were keeping up with the speed in your lane which is right and proper!

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