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Smart Motorways, is it time to end them?

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cactustwirly

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50mph NSL overall would be silly, to be honest, though I would support 50-60-70 for single-dual-motorway, that is happening in a lot of places anyway by the limits being signed.

That wouldn't be confusing at all for roads like the A1...

Why should dual carriageways be 60s, my commute takes me on a dual carriageways which becomes a motorway halfway along. It's identical except the motorway has blue signs and a hard shoulder.
 
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mmh

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"Reported". That's lovely.

Why not instant and permanent ban from driving? That's what train drivers would get if they took such a disregard for the rules.
Standard police language. Reported for possible prosecution by the CPS. What do you think it means? "Instant ban?" I don't think even the biggest proponent of hard justice thinks that should be in a police officer's hand.

As ever with these threads, I suspect many people on them have either never driven, never had any dealings with our legal system, or both.
 

The exile

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I’m surprised you didn’t learn this in your lessons.

Circular signs are mandatory (also octagonal in the case of stop signs!)

Triangles are warnings

Anything else is advisory.
I'm not surprised that anyone is confused (though slightly so that this is not currently covered). Given the plethora of apparently different signs and the number of times single ones display something apparently random I frequently find myself wondering "what exactly am I supposed to do here?" Being naturally cautious I tend to opt for the most cautious safe option, but there have been frequent occasions where a single lane is displaying a figure in an overhead gantry but you can see the next one ahead is blank and there is apparently no obstruction in between) - or where the display is off to the side and you can see there is a figure on it as you approach - which is then obscured by the continuous line of high-sided vehicles in the outside lane. That's before I get on to the "roadworks speed limits" signs which get left behind after the works finish...
In situations where all the electronic signs are actually working correctly (!), then I think it would be an improvement if any "new" signage were to flash [or have orange / yellow flashing lights round it] (so that would be all signs along the affected stretch for a little more than the average time taken to pass between two signs - ie everyone in the affected area should see at least one flashing sign, except those in the last section - followed after that time by just the first one) and that, on removal of the restriction , the restriction were to be progressively replaced by the "national speed limit applies" sign working backwards through the restriction.
 

Ianno87

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Standard police language. Reported for possible prosecution by the CPS. What do you think it means? "Instant ban?" I don't think even the biggest proponent of hard justice thinks that should be in a police officer's hand.

As ever with these threads, I suspect many people on them have either never driven, never had any dealings with our legal system, or both.

Having reported driving offences myself, and regularly seeing bad or negligent driving, I have little confidence that anything will be done beyond a line entry in a spreadsheet somewhere, to be forgotten forever.
 

Bletchleyite

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That wouldn't be confusing at all for roads like the A1...

Blue signs = 70, green signs = 60. What is confusing about that?

Don't ever drive a van if you find that confusing, as it is the law for vans already, so making cars the same is a simplification.

Why should dual carriageways be 60s, my commute takes me on a dual carriageways which becomes a motorway halfway along. It's identical except the motorway has blue signs and a hard shoulder.

Fairly key (hence my view that 60 should be put up on motorways without a hard shoulder). Also I expect a motorway might have better slip roads, no on-road lay-bys for discretionary stops etc. And cycling is permitted on most A roads.
 

AM9

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Alternatively: increase van limits (at least dual carriageway) to be the same as cars.
It's one thing raising the speed limits for small vans that are based on car bodies and aren't carrying loads greater than the car version's full load of passengers. But a larger van with a 1000kg load driven by a less than considerate driver is not the sort of vehicle to increase the allowed speed for, especially as their aerodynamics affects their CO2 output far more than smaller vans.
 

Bletchleyite

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It's one thing raising the speed limits for small vans that are based on car bodies and aren't carrying loads greater than the car version's full load of passengers. But a larger van with a 1000kg load driven by a less than considerate driver is not the sort of vehicle to increase the allowed speed for, especially as their aerodynamics affects their CO2 output far more than smaller vans.

Car derived vans already do have car speed limits. The grey area is small vans that aren't derived from cars, e.g. Transit Connects, Berlingos and the likes, where you have exactly the same thing but the presence of seats and windows or otherwise dictates the limit, when the vehicle is otherwise identical.
 

Peter Sarf

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......

100 people a year are Killed / Seriously Injured on average on the hard shoulder itself, which is usually narrower (and on motorways not upgraded in the last 15 years or so, generally built to a lower specification - hence why they have to spend time strengthening the hard shoulder when converting to Smart Motorway).

......

In the unfortunate event I did break down and was unable to make it to a wide, camera controlled, barrier protected Emergency Refuge (or get off the motorway), I'd rather the car be in a signal controlled running lane with advance indication given to drivers than to be in a hard shoulder narrower than a normal lane that there's an odds on chance some yummy mummy reading Facebook whilst driving, or some HGV changing the song on his phone on Spotify is going to crash straight into.

It's also worth pointing out that some of the high profile deaths were of people who shouldn't even have stopped if there was a hard shoulder! There was a woman in Birmingham who "took a nap" in what she thought was a hard shoulder, but was a running lane; and the two people who died in South Yorkshire M1 had stopped to exchange phone numbers after a bump, and stopped in a running lane (right in front of a sign saying "Emergency Refuge - 1 mile").
Yes. I would hope that the technology would help protect users in all lanes. But I think it is not reliable enough yet so is at risk of causing more problems than it solves.
Except that the current technology that is supposed to quickly identify when a vehicle has broken down on the inside lane very often doesn't work, so that broken down vehicle can be a sitting duck for 15 minutes. Having a continuous hard shoulder in which to pull over quickly - and where the passengers can get out of the vehicle to climb over the barrier - is far safer.

I say this as someone who has broken down on the M1 on a motorcycle many years ago. On the hard shoulder is was scary enough but I'd be petrified in a live running lane.
That is a very significant negative for smart mtorways.
I would rather be on a hard shoulder with the inside running lane closed as well. There are not only two options.

When it is not busy and I see a car on the hard shoulder I often pull out to lane 2 to give it a wide berth - it frustrates me how people often "undertake" me, close passing the stopped car, when I do.
I usually move over if there is space in the 2nd lane. But I have once had someone undertake me between the breakdown and myself !. It really comes down to how risk averse (or oblivious to risk) different people are.
I'm not surprised that anyone is confused (though slightly so that this is not currently covered). Given the plethora of apparently different signs and the number of times single ones display something apparently random I frequently find myself wondering "what exactly am I supposed to do here?" Being naturally cautious I tend to opt for the most cautious safe option, but there have been frequent occasions where a single lane is displaying a figure in an overhead gantry but you can see the next one ahead is blank and there is apparently no obstruction in between) - or where the display is off to the side and you can see there is a figure on it as you approach - which is then obscured by the continuous line of high-sided vehicles in the outside lane. That's before I get on to the "roadworks speed limits" signs which get left behind after the works finish...
In situations where all the electronic signs are actually working correctly (!), then I think it would be an improvement if any "new" signage were to flash [or have orange / yellow flashing lights round it] (so that would be all signs along the affected stretch for a little more than the average time taken to pass between two signs - ie everyone in the affected area should see at least one flashing sign, except those in the last section - followed after that time by just the first one) and that, on removal of the restriction , the restriction were to be progressively replaced by the "national speed limit applies" sign working backwards through the restriction.
This might help with situeations where the restrictions are being lifted. If the people behind only see a slightly less restrictive aspect then the obediently slower vehicles in front might not feel so swamped and intimidated.

I have seen restrictions on one gantry where I can see a different restriction on the next gantry ahead. Some will be tempted to go for the most restrictive of the two while others will favour the least restrictive. But I will go for obeying the restriction I am passing under. Just as long as that does not involve any sudden changes of speed or direction.
Blue signs = 70, green signs = 60. What is confusing about that?

Don't ever drive a van if you find that confusing, as it is the law for vans already, so making cars the same is a simplification.



Fairly key (hence my view that 60 should be put up on motorways without a hard shoulder). Also I expect a motorway might have better slip roads, no on-road lay-bys for discretionary stops etc. And cycling is permitted on most A roads.
Not to mention motorcycles under 50cc and learner drivers are not allowed on motorways.
Alternatively: increase van limits (at least dual carriageway) to be the same as cars.
In my experience many vans (proper ones) drive at 70+ mph !. On the M11 it seems like speeding vans are more common than cars. I do think the restrictions need to be kept simple but lumping large vans in with lorries makes sense. Regardless of how smart the motorway is.
It's one thing raising the speed limits for small vans that are based on car bodies and aren't carrying loads greater than the car version's full load of passengers. But a larger van with a 1000kg load driven by a less than considerate driver is not the sort of vehicle to increase the allowed speed for, especially as their aerodynamics affects their CO2 output far more than smaller vans.
Yes, I have seen right behind me those heavily laden vans that do not want to slow down and then accelerate again. It is to be hoped that the cameras on smart motorways might pick up their tailgating behavious.
 

domcoop7

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Having reported driving offences myself, and regularly seeing bad or negligent driving, I have little confidence that anything will be done beyond a line entry in a spreadsheet somewhere, to be forgotten forever.
In driving law, it's the person driving the vehicle who commits the offence. But the police, unless they have stopped the vehicle and arrested the driver, won't know who the driver is (only the registered keeper) and / or won't be in a position to charge the driver there and then with an offence (because they're generally not arrestable offences).

So the officer "reports" them to a senior officer (since in the legislation it's the Chief Officer or people acting on their behalf who has powers to demand further information about the identity of the driver) who will follow it up.

It sounds odd, because we think of the police as an organisation like "the council" or "British Gas", but from a legal perspective, each police officer is not an employee of the police but an officer holding an office under the Crown. Decisions and actions by police officers are individual to the specific officer. (it's an unlawful arrest and compensation is payable, for example, if PC Smith arrests you because PC Jones told her to - it's only legal if PC Smith herself made a personal decision that was justified by facts known to her).

So if a PC sees a driving offence in most cases they can't personally do anything about charging the driver, so the terminology is they "report" the person.

But this doesn't mean nothing will happen. It will be followed up on and the driver will be identified and offered a fixed penalty or prosecuted.
 

HSTEd

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This probably sounds silly - but maybe we should attempt to develop a cab speed-signalling technology for cars.

I know there are gelocate based systems being introduced by the EU but I don't know if they work in a dynamic situation like a controlled motorway
 

domcoop7

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This probably sounds silly - but maybe we should attempt to develop a cab speed-signalling technology for cars.

I know there are gelocate based systems being introduced by the EU but I don't know if they work in a dynamic situation like a controlled motorway
You know, it's funny you should say that. I had the same thoughts whilst driving home from Chester last Sunday, sitting in traffic on the M56 that (as is often the case) didn't seem to be caused by anything in particular other than volume of vehicles, and which evaporated away after 5 miles or so as quickly as it arose.

I wonder whether there could be a an ETCS system for cars, to grant movement authority (permissively, so that the driver and / or the autonomous vehicle still has the final say), and then report back location and speed. That way you could have a type of "moving block" smart motorway, where traffic three miles away could automatically trigger a signal to the car to say "don't exceed 45MPH for the next three miles" or whatever. Traffic lights could send signals saying "decelerate and reach 0MPH (because we're on red) in 250 metres" and then when they switch to green send a signal saying "you now have permission to travel up to 30MPH", and so on.
 

zwk500

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You know, it's funny you should say that. I had the same thoughts whilst driving home from Chester last Sunday, sitting in traffic on the M56 that (as is often the case) didn't seem to be caused by anything in particular other than volume of vehicles, and which evaporated away after 5 miles or so as quickly as it arose.

I wonder whether there could be a an ETCS system for cars, to grant movement authority (permissively, so that the driver and / or the autonomous vehicle still has the final say), and then report back location and speed. That way you could have a type of "moving block" smart motorway, where traffic three miles away could automatically trigger a signal to the car to say "don't exceed 45MPH for the next three miles" or whatever. Traffic lights could send signals saying "decelerate and reach 0MPH (because we're on red) in 250 metres" and then when they switch to green send a signal saying "you now have permission to travel up to 30MPH", and so on.
To all intents and purposes, if there is no intervening control of the vehicle then the current Variable Speed Limits achieve this function.
I also don't think it would be necessary to fit a system that restricts performance. The solution is for drivers to leave their egos outside the car and obey the limits. A couple of penalty points and being relieved of £150-200 would help reinforce the message.
 

HSTEd

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To all intents and purposes, if there is no intervening control of the vehicle then the current Variable Speed Limits achieve this function.
I also don't think it would be necessary to fit a system that restricts performance. The solution is for drivers to leave their egos outside the car and obey the limits. A couple of penalty points and being relieved of £150-200 would help reinforce the message.

Having the speed limit repeated on the dash next to the speedo would be a good way to hammer this home - especially in situations where the speed limit is liable to rapid changes.
 

Bletchleyite

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Having the speed limit repeated on the dash next to the speedo would be a good way to hammer this home - especially in situations where the speed limit is liable to rapid changes.

That would be quite helpful. I do quite like the "speed limit repeater" Waze provides, one reason why I tend to drive with it on even though I know the way, the other reason being traffic diversions.

It wouldn't require direct comms with the cars, just uploading the speed limits by stretch of motorway to a database that the likes of Waze can query based on GPS location would be fine. It could also then beep at you if the limit changed to reduce the risk of you missing it.
 

Domh245

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Having the speed limit repeated on the dash next to the speedo would be a good way to hammer this home - especially in situations where the speed limit is liable to rapid changes.

There are automatic traffic sign recognition systems, but I do not know if those work with variable speed limits. Automatic speed limiting was discussed at great length recently in a different thread, and whilst I agree that we should develop a sort of cab signalling type system for the road - it should be as key enabler of a self-driving vehicles, not just to replace people who are unable to pay attention to road signs
 

Peter Sarf

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Having the speed limit repeated on the dash next to the speedo would be a good way to hammer this home - especially in situations where the speed limit is liable to rapid changes.
That is a good idea. Given the fact that, to check your speed, you would be looking (glancing) at the speedometer it makes sense to show the speed limit you are aiming for right next to the speedometer.
 

bramling

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You know, it's funny you should say that. I had the same thoughts whilst driving home from Chester last Sunday, sitting in traffic on the M56 that (as is often the case) didn't seem to be caused by anything in particular other than volume of vehicles, and which evaporated away after 5 miles or so as quickly as it arose.

I wonder whether there could be a an ETCS system for cars, to grant movement authority (permissively, so that the driver and / or the autonomous vehicle still has the final say), and then report back location and speed. That way you could have a type of "moving block" smart motorway, where traffic three miles away could automatically trigger a signal to the car to say "don't exceed 45MPH for the next three miles" or whatever. Traffic lights could send signals saying "decelerate and reach 0MPH (because we're on red) in 250 metres" and then when they switch to green send a signal saying "you now have permission to travel up to 30MPH", and so on.

This sort of thing would probably be pretty good if it could be got to work well. However I'm sceptical as to how it would be received though - many drivers are presently incapable of reading the road more than about six feet in front of their own nose.
 

Ediswan

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That is a good idea. Given the fact that, to check your speed, you would be looking (glancing) at the speedometer it makes sense to show the speed limit you are aiming for right next to the speedometer.
You could possibly incorporate a variable red arc for 'overspeed' into the speedometer, much as is often seen as a fixed mark on the tachometer (rev counter).

The optiona extra would be a segment of yellow arc to indicate 'speeding but unlikely to get a ticket' ;)
 

zwk500

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That would be quite helpful. I do quite like the "speed limit repeater" Waze provides, one reason why I tend to drive with it on even though I know the way, the other reason being traffic diversions.

This sort of thing would probably be pretty good if it could be got to work well. However I'm sceptical as to how it would be received though - many drivers are presently incapable of reading the road more than about six feet in front of their own nose.
This highlights a key fear - too many drivers are just 'on instruments'. Anything that encourages them to shift their attention inside the vehicle (to an object that is relatively speaking stationary) and away from the outside world (where the hazards are fast approaching) is a bad idea.
 

Bletchleyite

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This highlights a key fear - too many drivers are just 'on instruments'. Anything that encourages them to shift their attention inside the vehicle (to an object that is relatively speaking stationary) and away from the outside world (where the hazards are fast approaching) is a bad idea.

This is not true. Sat navs reduce stress and ease navigation so more attention can be paid to vehicle operation and not navigation. Showing the speed limit reduces unintentional speeding and is a safety benefit.

The railway knows how to do this kind of thing and considers "head up displays" a good thing.
 

bramling

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This is not true. Sat navs reduce stress and ease navigation so more attention can be paid to vehicle operation and not navigation. Showing the speed limit reduces unintentional speeding and is a safety benefit.

The railway knows how to do this kind of thing and considers "head up displays" a good thing.

The latter point is debateable - stuff like DAS makes for nice glitzy press releases, but I'm not convinced how valuable it is to the average driver. If anything it seems to be a fad which has perhaps come and gone.

As regards sat navs, you're probably on balance right. I came across an unexpected road closure today, and I must admit it was quite good having the sat nav (which I tend to set up for familiar journeys simply to convey traffic information) plan an alternative route, even though I had a reasonable idea where I needed to go, it gave me added confidence. You can't beat proper maps, pre-planning and a second human in the car that knows what they're doing, though. By the same token, I hate driving by the sat nav as I like to have an idea in my head where I am - I find the sat nav degrades this.

One should also add, any sat nav is only good as the person operating it. If one puts rubbish in, one will get rubbish out.
 

Domh245

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This is not true. Sat navs reduce stress and ease navigation so more attention can be paid to vehicle operation and not navigation. Showing the speed limit reduces unintentional speeding and is a safety benefit.

The railway knows how to do this kind of thing and considers "head up displays" a good thing.

Heads ups displays are useful for exactly the opposite reason - they take useful information and put it in a line of sight for looking out of the vehicle, stopping people from staring at the dashboard.

I think if you were to show the moving speed limit in a car, it may just be easiest to show "OK" at the top of the speedo, with "too slow" to the left and "too fast" to the right, rather than actual speeds in the traditional fixed positions. Deliberately obfuscating the actual speed and limit would discourage people from trying to drive exactly at the limit all the time (removing attention from the road), and by making the display simple and within peripheral vision when looking ahead it further reduces the excuse for looking away from the road
 

py_megapixel

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I think if you were to show the moving speed limit in a car, it may just be easiest to show "OK" at the top of the speedo, with "too slow" to the left and "too fast" to the right, rather than actual speeds in the traditional fixed positions. Deliberately obfuscating the actual speed and limit would discourage people from trying to drive exactly at the limit all the time (removing attention from the road), and by making the display simple and within peripheral vision when looking ahead it further reduces the excuse for looking away from the road
I'd be concerned about people assuming the car is acting in their best interest and always trying to keep the needle centred even if it is unsafe (e.g. driving in fog)
 

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Heads ups displays are useful for exactly the opposite reason - they take useful information and put it in a line of sight for looking out of the vehicle, stopping people from staring at the dashboard.

I think if you were to show the moving speed limit in a car, it may just be easiest to show "OK" at the top of the speedo, with "too slow" to the left and "too fast" to the right, rather than actual speeds in the traditional fixed positions. Deliberately obfuscating the actual speed and limit would discourage people from trying to drive exactly at the limit all the time (removing attention from the road), and by making the display simple and within peripheral vision when looking ahead it further reduces the excuse for looking away from the road

Really people should be able to judge speed without needing to refer to the speedo. Rigid enforcement unfortunately works against this - it's rather counter-intuitive to stick a camera at a location which will be known to have a history of being specifically dangerous, and then have people focussing on their speedometer.
 

Domh245

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I'd be concerned about people assuming the car is acting in their best interest and always trying to keep the needle centred even if it is unsafe (e.g. driving in fog)

Good point, which is why the best solution is (still) no instruments or controls for occupants at all! If you were insistent on doing centralised moving speed limits to cars, you could drop the speed limit in unsafe conditions, or even just remove it and revert it back to giving you a speed - the unfamiliarity would hopefully prompt people to drive cautiously
 

zwk500

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This is not true. Sat navs reduce stress and ease navigation so more attention can be paid to vehicle operation and not navigation. Showing the speed limit reduces unintentional speeding and is a safety benefit.
Sat navs help by removing a key worry that would otherwise further distract you by looking at a map/sheet of paper. Its a better option but by no means ideal.

Speed limits are much less complicated. They are also not intended to be the one and only speed you drive at - the driver must moderate their speed according to the conditions. Its quite different from the railway scenario of movement authorities on fixed tracks.
 

Bletchleyite

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Sat navs help by removing a key worry that would otherwise further distract you by looking at a map/sheet of paper. Its a better option but by no means ideal.

Speed limits are much less complicated. They are also not intended to be the one and only speed you drive at - the driver must moderate their speed according to the conditions. Its quite different from the railway scenario of movement authorities on fixed tracks.

True, but they are also something you have to remember to get it right. Short term memory is not my forte (don't know about you) and so I find a reminder helpful for an occasional glance if not sure.
 

Ediswan

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I think if you were to show the moving speed limit in a car, it may just be easiest to show "OK" at the top of the speedo, with "too slow" to the left and "too fast" to the right, rather than actual speeds in the traditional fixed positions.
Not so sure about that one. It would tend to give the impression of a target speed rather than a limit. You would also need to consider how the display behaves when the speed limit changes. A sudden jump of the dial would be distraction in itself (or could be missed completely). Some level of smoothing would be appropriate.
 
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