• The Forums are now open to new registrations, adverts are also being de-tuned.

Speed limits and maths

Some good stuff in there, but I can't see the political content in all of them.

Can we have DaveK back?


great quotes. many tongue in cheek ones as one. Funny he left the ones out with his own views and kept in clear ones that were said as a joke in the spirit.
i would not expect anything less. This is how daily mail sell their stories. sensational headlines, masking the real agenda or lack of it thereof

http://www.mbclub.co.uk/forums/showthread.php?t=57784&page=9 post 124
http://www.mbclub.co.uk/forums/showthread.php?p=627858#post627858 post 16
http://www.mbclub.co.uk/forums/showthread.php?p=624569#post624569 post 27
dealership bashing
http://www.mbclub.co.uk/forums/showthread.php?p=581002#post581002 post 11

http://www.mbclub.co.uk/forums/showthread.php?t=51776&page=7&highlight post 103

just a few of others. All in humour though. Agenda abound.

http://www.mbclub.co.uk/forums/showthread.php?t=38646&highlight

maybe we should just agree to disagree.

Nothing political in there then?:devil:
 
Last edited:
Well, I wondered whether I might provoke a few rants from some members, but I had rather hoped it wouldn't happen.

The point that I thought we might all agree with was that effective traffic enforcement is necessary to protect law-abiding motorists and pedestrians. The way this is done is simply the most cost-effective method, which saves everyone money in the end.

Motorists are fined for traffic offences because, by definition, motorists have assets, so fines are effective and efficient. Criminals 'do time' (in the community or in prison) because they often don't have assets, so fines are pointless.

Revenue generation disguised as traffic enforcement should be resisted, of course, as should inciting offences. Posting examples on this forum helps a bit, I suspect. However, the common view that "all fines are just revenue generation" simply undermines effective traffic enforcement.

One could argue for hours about the details (speed limits, penalties, etc.) but in the end it won't make much difference!
 
I'll try and get this thread back on topic :)

I have a slightly different view. The law is an (overly) complex beats and the man on the street doesn't understand it. I'd go so far as to say that even the police don't understand large chunks of it.

that said, most people have their own sense of right and wrong and they tend to live by their own code of what they should and should not do. by and large this accords with the law and hence we live fairly happily and not in jail.

that said, there are often ways in which the normal person thinks something is right but in fact it is against the law. Even when they find out that their actions are illegal, they tend to continue to do them anyway as it fits their own thoughts of what is right.

a good example of this is ripping CD's onto their computer for use with an ipod or other similar device. generally people don't think anything of doing this, but actually, there is no provision in law giving you the right to do it. there is an america, but not in the UK.

does that fact stop anyone doing it? not at all. they feel that they have the right to do so and thus they do.

now onto speed limits. I think that most people who have driving for several years have a good understanding of what the combination of the road, their car and their skill and confidence level will allow. This feeling is based on many factors such as the width of the road, the sharpness of the curves, the visibility, the type and state of their car and their confidence for example.

this is why on country roads with NSL signs up, they'll go fast on the long straight bits and slow down much more for the winding, low visibility corners. Also it explains why people will happily drive down a road at 30, and thenh slow to 15 or 20 when there are cars parked on both sides of the road, even though the posted speed limit has not changed. suddenly the width and visibility have changed and drivers feel uncomfortable going so quickly.

Yes, there is some variance in what they think they can do, and what they actually can do. and also, some corners are a lot sharper than they look by I still think that by and large, drivers know what is roughly an appropriate speed limit for them.

however, in much the same way as the cd ripping issue I stated above, I think that drivers also tend to actually drive at the speed they think is appropriate, regardless of what the posted speed limit is. if the posted speed limit is "obviously too low" (for whatever that means), the you'll find a lot of drivers break it routinely unless forced to slow down by cameras and the like.

a good example of this is the normal motorway. I beleive that UK motorways are designed for a speed of 100 miles an hour. while the man on the street may not know this, they know that the width of the road, the wide visibility, the quality of their car etcetc means that 70mph is too low a speed for that road. because of this they feel confident in breaking the limit and driving at more than 70mph.

for those who have tried driving at exactly 70, you'll often find that the majority of traffic overtakes you. a DfT study in 2006 found that more than 50% of traffic on the motorways they studied was in excess of the NSL.

I don't think that the lowering of the speed limit on various roads across the country is generally due to revenue generation (perhaps in some cases though), but more likely due to a nannying influence and an attempt by councils not to be sued etc. but still, if people think that a speed limit is obviously too low, they will ignore it and drive at the speed they think is right.

I would even hazard to say that by and large, it's not too much of a problem either (dons flame-proof suit).

the big problem to me is that there are bits of the road that are deceptive. corners that are too sharp, places where traffic genuinely needs to slow down and it's not obvious to oncoming traffic why. these ares should have, and probably do have lower/correct speed limits set, but the prevalence of incorrect and obviously wrong speed limits dilutes these real areas of concern and because people ignore the stupid limits, they end up ignoring the proper ones.

*this* I feel is the problem.

Now obviously there is some variance in what different people think is appropriate, but If the gov/councils raised the speed limit (even over 70 in the right places) where appropriate and set generally realistic speed limits on the other roads, then I think that the danger areas where traffic really does need to slow down in case of accidents, will be obeyed more and thus, the public safer as a result.

thoughts on a postcard?

dave

PS. I hope that I've not managed to insult anyone with the above.. I don't think any of it was personal, anti-police, racist, sexist, fattist, though it might be a little controversial. for that I apologise...
 
the big problem to me is that there are bits of the road that are deceptive. corners that are too sharp, places where traffic genuinely needs to slow down and it's not obvious to oncoming traffic why. these ares should have, and probably do have lower/correct speed limits set, but the prevalence of incorrect and obviously wrong speed limits dilutes these real areas of concern and because people ignore the stupid limits, they end up ignoring the proper ones.

*this* I feel is the problem.

Now obviously there is some variance in what different people think is appropriate, but If the gov/councils raised the speed limit (even over 70 in the right places) where appropriate and set generally realistic speed limits on the other roads, then I think that the danger areas where traffic really does need to slow down in case of accidents, will be obeyed more and thus, the public safer as a result.
I am wholeheartedly in agreement with your post, and the snippet above very accurately sums up why the use of lower speed limits on their own rarely does anything other than reduce the rate of compliance. Thank you.
 
The point that I thought we might all agree with was that effective traffic enforcement is necessary to protect law-abiding motorists and pedestrians. The way this is done is simply the most cost-effective method, which saves everyone money in the end

Motorists are fined for traffic offences because, by definition, motorists have assets, so fines are effective and efficient. Criminals 'do time' (in the community or in prison) because they often don't have assets, so fines are pointless

Fines may be pointless, for those who do not have assets but why should someone with money be treated differently, they could penalise traffic offenses by means of community service. If that was the case I bet a) compliance with the law would increase b) less monotoring of the roads would occur as there would be less financial incentive.

I therefore think you might want to question this bit a bit more.

Revenue generation disguised as traffic enforcement should be resisted, of course, as should inciting offences. Posting examples on this forum helps a bit, I suspect. However, the common view that "all fines are just revenue generation" simply undermines effective traffic enforcement.
 
The big problem to me is that there are bits of the road that are deceptive. corners that are too sharp, places where traffic genuinely needs to slow down and it's not obvious to oncoming traffic why. these ares should have, and probably do have lower/correct speed limits set, but the prevalence of incorrect and obviously wrong speed limits dilutes these real areas of concern and because people ignore the stupid limits, they end up ignoring the proper ones.

I agree with much of what you say, but not with your conclusions. I believe it is necessary for speed limits to be set in such a way that they are very easy to understand. One of the biggest problems I find is knowing what the current speed limit is. How many drivers have you seen braking just before a speed camera even though they were travelling below the speed limit? A surprising number of people don't even know what the NSL is for each type of road! Having highly-variable speed limits is just a recipe for confusion, IMO. I am sure the best approach would be for speed limits to be as obvious as possible. This means having standard national speed limits that are rarely modified.

What they do in some other countries (e.g. the USA) is to have a simple system of speed limits but to post advisory speeds on warning signs. So, when you approach a bend where a warning triangle is needed, the advised maximum speed (in good conditions) is shown below the sign. This gives drivers a very good idea how sharp the bend will be. Going too fast wouldn't break the speed limit, but it could break your neck!

I also disagree with the practice of teaching new drivers to drive always at the speed limit. This gives them the impression that the speed limit is the safe speed for the road, when often it is not. It is much more important to drive at the right speed. If drivers were properly educated then it would be possible to raise some speed limits.

In many European countries, there are just two national speed limits: 50 km/h in urban areas and 80 km/h elsewhere. (These equate roughly to 30 and 50 mph.) The start and end of each urban area is also clearly marked, so the speed limit is usually pretty obvious. Other roads (e.g. residential streets, dual carriageways, motorways) have signed speed limits, some of which can be as high as 140 km/h or as low as 30 km/h.
 
Fines may be pointless, for those who do not have assets but why should someone with money be treated differently, they could penalise traffic offenses by means of community service. If that was the case I bet a) compliance with the law would increase b) less monotoring of the roads would occur as there would be less financial incentive.

Which taxes are you going to raise to pay for this? Community service and prisons are very expensive to operate. Fines pay for themselves!
 
Last edited:
I agree with much of what you say, but not with your conclusions. I believe it is necessary for speed limits to be set in such a way that they are very easy to understand. One of the biggest problems I find is knowing what the current speed limit is. How many drivers have you seen braking just before a speed camera even though they were travelling below the speed limit? A surprising number of people don't even know what the NSL is for each type of road! Having highly-variable speed limits is just a recipe for confusion, IMO. I am sure the best approach would be for speed limits to be as obvious as possible. This means having standard national speed limits that are rarely modified.

Many driver's don't know what a dual carriage way is!

but yes, you're right about people not knowing what the speed limit is, which backs up my assertion that many people just drive at the speed they think is appropriate and only wonder what the speed limit actually is when they see a camera.

I agree that we seem to have too many limits, having 20, 30, 40, 50, 60, 70[1] and NSL gves a lot of variation, I wonder if we might be better wuith 30, 50 and 70, or maybe even 20, 40 and 80? I don't think people mind driving at 20 (or slower) past the entrance to a school, but they do mind being forced down to 30 on a dual carriage way, with very wide verges eaither side and few corners.

so I agree with you, but I don't think that goes against what I was saying. I still think that artificially low speed limits will always be disobeyed while people can do it and get away with it. and the solution to this should not be GPS tracking or APNR average speed checks, but a sensible setting of the speed limit in the first place.

and it raises the question that if more than 50% of the population routinely break the law, then does that law have any point? we're already at the point where speeding and parking fines are considered a fairly "irrelevant" offense. many places that do background checks on you ask if you have "ever been found guilty of a crime (speeding and parking offenses excepted)". is the right answer to try to criminalise the majority of the population, or try and fix the root of the problem?

as an aside, it annoys me when you're slowed down on the motorway due to roadworks, and then the roadworks end but there is no NSL sign to reset you to 70 again. that bugs me as I never know if the slow limit still applies, even though everyone else is racing off to 70(+) again.

dave



[1] why do you see 70mph speed limit signs in some places? why aren't they NSL signs instead?
 
Last edited:
[1] why do you see 70mph speed limit signs in some places? why aren't they NSL signs instead?
You mean a dual carriageway with a 70 sign where NSL would be the same speed? Wondered it myself. In fact, I think we have discussed this in person! :)
 
You mean a dual carriageway with a 70 sign where NSL would be the same speed? Wondered it myself. In fact, I think we have discussed this in person! :)

yes, you're quite right, I didn't make it clear.

a good example of this is as you head up the M6 into scotland. the road changes from the M6 to the A74(M)? (checks google maps - yes) and then you start seeing 70mph signs. it's still a motorway, it's still effectively the same road as the M6.

weird..

anyone know?
 
It's because the maximum speed permitted under NSL on a dual carriageway varies by vehicle type differntly to the maximum speed permitted on a motorway. On an NSL Dual Carriageway:

70mph - Cars & bikes
60mph - Cars towing trailers or caravans, Buses or Minibuses, Goods vehicles upto 7.5 tonnes.
50mph - Goods vehicles over 7.5 tonnes

On a Motorway:

70mph - Cars & bikes, Buses or Minibuses, Goods vehicles upto 7.5 tonnes
60mph - Cars towing trailers or caravans, Goods vehicles upto 7.5 tonnes that are articulated or towing a tralier.
60mph - Goods vehicles over 7.5 tonnes

(and yes, I know that HGV's are limited to 90kph!)
 
Which taxes are you going to raise to pay for this? Community service and prisons are very expensive to operate. Fines pay for themselves!

The age old conundrum, I'd just cut public spending, public sector employment, cut benefits.
 
It's because the maximum speed permitted under NSL on a dual carriageway varies by vehicle type differntly to the maximum speed permitted on a motorway.


that's a very good answer, but the road I referred to above is the A74(M), which occupies that murky place between motorways and A roads, but afaik, the M suffix grants it full motorway regulations, hence that road is a motorway. Thus I still don't see why it would be a 70 sign, instead of an NSL sign.

good answer though :)

dave
 
The age old conundrum, I'd just cut public spending, public sector employment, cut benefits.

:D
 

Users who are viewing this thread

Back
Top Bottom