Speed Warning Device

Car_54

AdrianC wrote: »

Whilst I'd agree with the suggestion, I disagree with that "fundamental". What the OP should learn - and will have already learnt on the "several" SACs he's also been on, is that the speed limit is not the only hazard out there.

If the many blatant clues to the limit are being missed, what other hazards are also being missed? It's not a case of looking for one thing stops you looking for other things - it's a case of clearly not looking (and thinking) about the hazards surrounding the car. If you're looking for those hazards, the streetlights and/or repeater signs will be blatantly obvious.

As for "forgetting" what the clues are, they are really simple.

Are there reminders? Yes? That's the limit.
If not, are there streetlights? Yes? 30.
If not, are there two carriageways? Yes? 70.
No to all of those? 60.

Yes, it really IS that simple, on EVERY single road in the UK. If the OP genuinely can't remember that, then what other basic fundamentals of driving is he also forgetting?

Almost, but not quite.

In a 20 mph zone there will be streetlights, but traffic calming features rather than repeater signs.

AdrianC

Car_54 wrote: »

Almost, but not quite.

In a 20 mph zone there will be streetlights, but traffic calming features rather than repeater signs.

There will be repeaters.

Cornucopia

For 20 "zones", there only need to be speed reducing measures. e.g. speed humps, speed cushions, chicanes, etc.

As opposed to a 20mph road.


Driving down the A2 today between the M25 & the Medway Bridge - it's a 4 lane dual carriageway with street lighting. What else does it have? NSL repeaters, of course.

AdrianC

Cornucopia wrote: »

For 20 "zones", there only need to be speed reducing measures. e.g. speed humps, speed cushions, chicanes, etc.

As opposed to a 20mph road.

A "20 zone" without a 20mph speed limit is meaningless marketing guff, no more, no less.

Cornucopia

AdrianC wrote: »

A "20 zone" without a 20mph speed limit is meaningless marketing guff, no more, no less.

A 20 zone has terminal signs on its perimeter, but no requirement for repeaters as long as there are regular "speed reducing features".

AdrianC

Cornucopia wrote: »

A 20 zone has terminal signs on its perimeter, but no requirement for repeaters as long as there are regular "speed reducing features".

But it's a 30mph limit, which is the only thing that matters in the context of this discussion.

Cornucopia

It's a 20 limit.

The only difference is it's a speed limit imposed over an area, rather than along the length of a road.

Joe_Horner

AdrianC wrote: »

Go on....?

Cornucopia wrote: »

The A720 Edinburgh bypass is a 70mph Dual Carriageway, for most of its length.

IIRC, it has 70 terminal signs and repeaters, presumably because it has street lighting (and would otherwise be 30mph limit).

There also used to be a 70 terminal sign at the start of the M4 in London. (I think that may be a historical accident, though).

The reason isn't to do with street lighting, it's to do with the class of road. Incidentally, yes it is parts of the A470 near Edinburgh, and also the A1 to the east.

Historically, all public roads were a general right of way. That means that they could be restricted regarding what you could drive on them for physical limitations (size and weight) but they couldn't be restricted to certain licence types (such as "no learners") or vehice type ("no mopeds / no tractors")

The Special Roads Act 1949 created a legal framework for making roads that were not automatic rights of way to all drivers, and this is what motorways are constructed under to allow the bans on mopeds, learners, tractors and so on.

Other roads are known as General Purpose roads.

But there are a few roads (parts of the A470, A1 and A55 near us) which are restricted - like motorways - to prevent learners etc using them without actually being motorways. These also have to be created as special roads in order to make the restrictions legal.

The way the law is worded, the national speed limit applies specifically to all general purpose roads and to all motorways, but not to non-motorway special roads. I have no idea whether that was an oversight or intentional to facilitate the creation of unlimited roads if they ever want to.

Instead, non-motorway special roads have a TRO in force which applies the same speed limit (70mph) but needs to be signed as a specific speed rather than NSL just like any other TRO imposed speed must be. They must also, like any TRO imposed limit, have repeater signs for the imposed limit, so you pass a "70" sign as you enter them and "70" repeaters until you leave them.

AdrianC

Joe_Horner wrote: »

But there are a few roads (parts of the A470, A1 and A55 near us) which are restricted - like motorways - to prevent learners etc using them without actually being motorways. These also have to be created as special roads in order to make the restrictions legal.

The way the law is worded, the national speed limit applies specifically to all general purpose roads and to all motorways, but not to non-motorway special roads.

Ah. That makes sense.

I have no idea whether that was an oversight or intentional to facilitate the creation of unlimited roads if they ever want to.

Personally, I always lean towards c0ck-up over conspiracy...

DCFC79

Buy a warning device or a sat nav with the speed Iimit warning option, what will you do when said device doesn't work ?

Concentrate on the change of speed limits ?