Motorway Advisory Speed signs

Motorway Advisory Speed signs

Author
Discussion

covboy

Original Poster:

2,577 posts

175 months

Thursday 24th February 2011
quotequote all
Anybody know if there is a set criteria for the need of advisory speed/bend signs.

The reason I ask, travelling north on the M5 the other night from J4 – a journey I used to make daily when I worked in that neck of the woods – I noticed towards the top of the climb up to Frankly Services there had appeared a 50mph and RH bend advisory sign.

After 40+ years(?) of this motorway being open has it suddenly become dangerous for what is a very gentle curve to be taken at 70mph.

Another sign of the nanny state ?

jazzyjeff

3,652 posts

260 months

Thursday 24th February 2011
quotequote all
covboy said:
Another sign of the nanny state ?
No, just H&S gone wild. It's advisory, not compulsory. Accordingly, unless they're accompanied by a "Queue Ahead" message I tend to ignore them completely...

JJ

bob parr

182 posts

193 months

Thursday 24th February 2011
quotequote all
There could have been a number of factors for the advisory limits to be set, am sure one of our control room bods will be along to update, but it might have been:
Heavy Rain
Standing Water
Queuing Traffic
Reports of debris / pedestrians / animals in the carriageway
High Winds
Snow / Ice
Breakdown on restricted hard shoulder
Diesel / Oil spill
Roadworks crew setting up
We might have been on the H/S dealing with an incident and requested them just to slow the traffic down

Anything really

covboy

Original Poster:

2,577 posts

175 months

Thursday 24th February 2011
quotequote all
bob parr said:
There could have been a number of factors for the advisory limits to be set, am sure one of our control room bods will be along to update, but it might have been:
Heavy Rain
Standing Water
Queuing Traffic
Reports of debris / pedestrians / animals in the carriageway
High Winds
Snow / Ice
Breakdown on restricted hard shoulder
Diesel / Oil spill
Roadworks crew setting up
We might have been on the H/S dealing with an incident and requested them just to slow the traffic down

Anything really
Not talking illuminated signs - fixed 50mph inside triangle with bend sign underneath

bob parr

182 posts

193 months

Thursday 24th February 2011
quotequote all
It's an advisory, what the criteria is I don't know.

I remember when I learnt to drive my instructor said if for example you're on a 60mph road and you see signs and markers indicating say bend ahead 40 mph, then it's for a reason usually that you may struggle to take the bend at that speed.

Interestingly these "advisory" signs have recently been removed from parts of the A55

anonymous-user

55 months

Thursday 24th February 2011
quotequote all
covboy said:
Anybody know if there is a set criteria for the need of advisory speed/bend signs.

The reason I ask, travelling north on the M5 the other night from J4 – a journey I used to make daily when I worked in that neck of the woods – I noticed towards the top of the climb up to Frankly Services there had appeared a 50mph and RH bend advisory sign.

After 40+ years(?) of this motorway being open has it suddenly become dangerous for what is a very gentle curve to be taken at 70mph.

Another sign of the nanny state ?
There may have been a few bumps there so one of the first/cheaper options to reduce these may be to see if signage has a 'positve' effect on accident reduction.

A recent scrim test may have highlighted the road is 'wearing out' and may be more slippery but not enough to meet the requirements for temporary or permanent skid risk signs or resurfacing.

Hardly nanny state. Maybe proactive safety measures ?

There used to be similiar signage on the M53 now gone. Their is similiar signage on a bend notoriously for regular accidents on another motorway. It may become a mandatory 50 as in other locations.

A quick call to the Highways information line should quickly get you your answer smile

Nigel Worc's

8,121 posts

189 months

Thursday 24th February 2011
quotequote all
There has been one of those, on the M5, by JNC 4 since I were a lad ...... and thats a long time !

It's a sad thing to say, but I've yet to see one of those signs anywhere that it was even remotely close to being needed !

This of course is a shame, because it leads to us ignoring warning signs.

bluetone

2,047 posts

220 months

Thursday 24th February 2011
quotequote all
They put me on-guard that visibility around an approaching bend is likely to be poor = if there's standing traffic around the bend, I may not see it in time to pull up short without reducing my speed. I think they should make this point about lack of distance vision; might make people realise why the warning's there....?

Nigel Worc's

8,121 posts

189 months

Thursday 24th February 2011
quotequote all
bluetone said:
They put me on-guard that visibility around an approaching bend is likely to be poor = if there's standing traffic around the bend, I may not see it in time to pull up short without reducing my speed. I think they should make this point about lack of distance vision; might make people realise why the warning's there....?
The sign without the speed indication would make me think along similar lines, as soon as I see a suggested max speed ........ I take it as bks

streaky

19,311 posts

250 months

Friday 25th February 2011
quotequote all
bluetone said:
They put me on-guard that visibility around an approaching bend is likely to be poor = if there's standing traffic around the bend, I may not see it in time to pull up short without reducing my speed.
Doesn't the presence of the bend do that?


bluetone said:
I think they should make this point about lack of distance vision; might make people realise why the warning's there
More bl00dy dumbing-down.


Streaky

anonymous-user

55 months

Friday 25th February 2011
quotequote all
streaky said:
More bl00dy dumbing-down.
Streaky
It obviously isn't dumbed down enough yet for many because idiots still keep sliding off or hitting the back of a queue on a daily
basis.

AMATEURS smile

F i F

44,227 posts

252 months

Friday 25th February 2011
quotequote all
That junction and opinions on those signs are of interest to me as on one of my regular retests I got a new one ripped by the plod examiner for blatting round that bend J4 Lydiate Ash on the M5(N). This was early on a Saturday morning, absolutely no other traffic around.

His argument was, restricted visibility, no hard shoulder, approaching the northbound on slip of J4, restricted visibility onto and from said on slip. Agreed that at no point was travelling in excess of speed that couldn't stop or deal with any hazard in distance seen to be clear.

Didn't cover what to do differently, which I found surprising and disappointing, eg seeing as no other traffic would it have been better to move out to L2/L3 and open up the view / limit point. No comment. Really!

Yet every other examiner or instructor have discussed this with has more or less said that he was being an arse and 70 is fine. confused

Personally I can see his point if the motorway is busy and you are in L1 and there is traffic in L2/L3 removing one option, so in that case peg it back, but then slowing to 50, per advisory limit, causes all sorts of aggro to vehicles behind so they are now looking for an overtake. So in reality, as always, it's a balancing act.

covboy

Original Poster:

2,577 posts

175 months

Friday 25th February 2011
quotequote all
Hi Fif

Not sure about the one at J4. This one is towards the top of the hill after J4 about 2 miles before Frankly services

PaulHogan

6,179 posts

279 months

Friday 25th February 2011
quotequote all
I always thought it was to indicate the safe speed for Austin A30 drivers

F i F

44,227 posts

252 months

Friday 25th February 2011
quotequote all
covboy said:
Hi Fif

Not sure about the one at J4. This one is towards the top of the hill after J4 about 2 miles before Frankly services
Hi there,

If that is the bend I'm thinking about aka "Dayhouse Bank" then the sign must be reasonably new, certainly doesn't appear on Google Streetview, though what does appear is that the Google camera car driver is a dedicated MLM. frown

I'll have a look later, have to head down that way around lunchtime. Report later.


skip_1

3,475 posts

191 months

Friday 25th February 2011
quotequote all
These are the ones with a pic of a truck toppling over? I tend to slow if in a high-sided vehicle and not if in anything else.

julianc

1,984 posts

260 months

Friday 25th February 2011
quotequote all
bob parr said:
It's an advisory, what the criteria is I don't know.

I remember when I learnt to drive my instructor said if for example you're on a 60mph road and you see signs and markers indicating say bend ahead 40 mph, then it's for a reason usually that you may struggle to take the bend at that speed.

Interestingly these "advisory" signs have recently been removed from parts of the A55
Unfortunately, one of the most common reasons these days is that they've forgotten to switch the sign off.

Hooli

32,278 posts

201 months

Friday 25th February 2011
quotequote all
skip_1 said:
These are the ones with a pic of a truck toppling over? I tend to slow if in a high-sided vehicle and not if in anything else.
The only time i've found them any use is when I used to drive coaches, otherwise they seem to indicate 50% of a safe cornering speed.

F i F

44,227 posts

252 months

Friday 25th February 2011
quotequote all
Right just back from the car park that is the M5 due to muppets driving into each other.

The bend referred to by the Op is here
Google street view and map

There are some of these newly erected signs 512 soon after J4 (N) and then a second set about where the street map view is together with 50 mph advisory text plates.

Obviously they must have been put up for a reason, but considering the bend is not that sharp, and if people just lifted their vision, and especially if they took a cross bend view, then there should be nothing to surprise them.

I conclude, therefore, this is another example of pandering to the lowest common denominator.




bob parr

182 posts

193 months

Saturday 26th February 2011
quotequote all
julianc said:
Unfortunately, one of the most common reasons these days is that they've forgotten to switch the sign off.
You can't forget to turn them off as there is an audible alarm when they are on in the control room