Are Artics still limited to 56Mph?

[davepoth]

IIRC the speedo is allowed to be over but not to be under. Since there are some accuracy limitations the manufacturers will test the speedometer, and set it to over-read by the minimum amount required to ensure it doesn't under-read. Some will over-read by more than others as a result.

In my experience it's tipper trucks that run fastest.

[aka_kerrly]

The speed limiters can't do anything to slow a lorry which is coasting down a hill! There is a stretch of the M5 just outside of Bristol where lorrys must be able to do 70>

[mikecassie]

The trucks get their speedo calibrated with worn tyres, still legal tread tho. Then when new tyres are fitted they get a couple more mph, it's not a lot but enough to help when doing the distances they do. Plus over the years the BHP of trucks has risen so they can go up hills at the same speed, some trucks must be nearing 750-800BHP now where as when I was a wee lad they were nearer 350-400bhp.

[HD Adam]

Anyone think we will come out of these ridiculous EU imposed limits after Brexit and go back to HGV's being able to do the actual limit?

[CubanPete]

They seem to be regulated vary accurately to within about 0.01mph of each other when they are side by side...

[Scotty2]

It's the 40 mph on A roads that is the killer. A15, A75, A47, A17 to name but a few that have fields either side but are still single carrigeway.

When I drive in Nederland and Germany, they make great use of "No trucks in lane 2 at all" for certain time restrictions. That works and stops "elephant racing" which infuriates me.

[TooMany2cvs]

HD Adam said:

Anyone think we will come out of these ridiculous EU imposed limits after Brexit and go back to HGV's being able to do the actual limit?

Apart from the minor detail that any wagons wishing to work within the EU would still have to have them, the UK would also have to leave the United Nations, since these are UNECE requirements and regulations, as well as EU.

[heebeegeetee]

Scotty2 said:

It's the 40 mph on A roads that is the killer. A15, A75, A47, A17 to name but a few that have fields either side but are still single carrigeway.

I thought that had changed, isn't it 50mph now?

[TooMany2cvs]

heebeegeetee said:

Scotty2 said:

It's the 40 mph on A roads that is the killer. A15, A75, A47, A17 to name but a few that have fields either side but are still single carrigeway.

I thought that had changed, isn't it 50mph now?

Almost exactly two years ago.

[bobtail4x4]

aka_kerrly said:

The speed limiters can't do anything to slow a lorry which is coasting down a hill! There is a stretch of the M5 just outside of Bristol where lorrys must be able to do 70>

but the tacho shows them speeding, if/when checked.

[Nigel Worc's]

TooMany2cvs said:

heebeegeetee said:

Scotty2 said:

It's the 40 mph on A roads that is the killer. A15, A75, A47, A17 to name but a few that have fields either side but are still single carrigeway.

I thought that had changed, isn't it 50mph now?

Almost exactly two years ago.

Off motorway they have exactly the same limits (jockland excepted) as a small van, and still they can clog the roads up !

[heebeegeetee]

Nigel Worc's said:

Off motorway they have exactly the same limits (jockland excepted) as a small van, and still they can clog the roads up !

No. 2 forms the queue.

Personally I reckon 1 in 3 drivers in the uk won't overtake anything due to their ineptitude, and given their numbers it only takes a few minutes before there's enough cars behind the hgv which screws things for everyone else.

[Panclan]

It's the same with the A41 from Chester down to the M54.

smifffymoto said:

The Stranraer road was a very dangerous place to driving at night when the boat came in and they were racing to Dover.

[thepeoplespal]

TooMany2cvs said:

Almost exactly two years ago.

IIRC The law has Not changed in Scotland.

[GC8]

traffman said:

Reason i ask is on more than one occasion whilst in my company van i have passed Artics doing well over the 56 mph , and struggled at times. One matched my limited speed of 67.

I just thought all of them are limited to 56 by law?

PM Stephen Hawking if you manage to limit gravity...

[GC8]

H6Nathan said:

Welshbeef said:

What happens if going downhill on M way they take truck out of gear surely it will naturally roll to a greater speed

This. Easy to get well over 80 mph M25 Jct 8-7 Reigate Hill and M40 through the cutting at Stokenchurch.

Overspeeds will register on digital tachos so not a good idea to do it if you value your license/job.

Not an infringement though and some tachos will give you a while over the limited speed (whatever it is) and then warn you for a while, before recording it.

[TooMany2cvs]

thepeoplespal said:

TooMany2cvs said:

Almost exactly two years ago.

IIRC The law has Not changed in Scotland.

Three of the four roads he named are major trunk routes in England.

[GC8]

TooMany2cvs said:

Three of the four roads he named are major trunk routes in England.

You're still 'knowledgeably' posting on a topic about which you know fk-all, as usual.

[Evanivitch]

PorkInsider said:

Evanivitch said:

It could be true, but it does vary greatly. Older vehicles tend to be nearer 10%, newer vehicles often less than 5%, but certainly not close to 1-2%.

Mine reads 80mph on the speedo at a GPS 79mph.

Interesting. What's the car and wheel size?

[GC8]

Quite unusual. My car is spot-on at all legal speeds, but I have moved from 205/50/16s to 205/55/16s in order to justify buying Michelins on an old runabout.

Judging from the number of lemmings driving at 44-45mph through average speed controlled motorway sections, I guess that the majority of speedometers are less accurate than some are suggesting.