Temporary speed limits

Author
Discussion

Vaux

Original Poster:

1,557 posts

217 months

Saturday 24th June 2006
quotequote all
Where temp limits are in place, for example road works on a motorway, is it OK (legal) to bring the limit down from 70 to 40 directly? I read somewhere that the reduction should not be more than 20 mph at a time - so 70-50-40.

tvrgit

8,472 posts

253 months

Saturday 24th June 2006
quotequote all
Yes it is - there is no legal requirement for "buffers"

vonhosen

40,281 posts

218 months

Saturday 24th June 2006
quotequote all
Vaux said:
Where temp limits are in place, for example road works on a motorway, is it OK (legal) to bring the limit down from 70 to 40 directly? I read somewhere that the reduction should not be more than 20 mph at a time - so 70-50-40.


With roadworks you will generally get a 3/4 mile warning to the reduction.

Vaux

Original Poster:

1,557 posts

217 months

Saturday 24th June 2006
quotequote all
vonhosen said:
With roadworks you will generally get a 3/4 mile warning to the reduction.

Only helps if you look though. Yesterday a nasty RTC on M56 J12 coming into a SPECS monitored 40 mph - always get a lot of heavy braking at the 40 signs (although the cameras are a few hundred yards away). Mercedes got it very wrong and ended up parked on its side up the verge in the trees.
I can't help thinking a more gradual speed reduction would ease the traffic flow.

tvrgit

8,472 posts

253 months

Saturday 24th June 2006
quotequote all
Vaux said:
vonhosen said:
With roadworks you will generally get a 3/4 mile warning to the reduction.

Only helps if you look though. Yesterday a nasty RTC on M56 J12 coming into a SPECS monitored 40 mph - always get a lot of heavy braking at the 40 signs (although the cameras are a few hundred yards away). Mercedes got it very wrong and ended up parked on its side up the verge in the trees.
I can't help thinking a more gradual speed reduction would ease the traffic flow.

Doesn't policy pander enough to idiots already then?

Vaux

Original Poster:

1,557 posts

217 months

Saturday 24th June 2006
quotequote all
tvrgit said:
Doesn't policy pander enough to idiots already then?

Well, yes. I know the answer is they should see the advanced warning signs, see the speed limit signs and pass them at the legal speed (if safe to do so etc.) or they shouldn't be allowed on a motorway.

But most of them can't.

My point is if the change in speed limit wasn't so "extreme", people wouldn't think "$hit, I really have to slow down now!", BRAKE, and cause problems for others. Like the Police, Ambulance, Fire and HATO who had to deal with the RTC yesterday.

GreenV8S

30,231 posts

285 months

Saturday 24th June 2006
quotequote all
vonhosen said:
With roadworks you will generally get a 3/4 mile warning to the reduction.


There doesn't seem to be any warning on the approach to the M1 Luton roadworks, and it always produces a lot of confusion where cars that carry on onto the speed limit at 70+ mph encounter cars that have slowed right down for the limit.

deeps

5,393 posts

242 months

Saturday 24th June 2006
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Jnct 16 M4 slip road has a sign saying "50 - 3/4 mile ahead".

So you pick up speed down the slip road then realise that you're faster than most others as you merge on. The 50 has infact already started.

I expect the slip road sign is there under instruction from the Wilts SCP.

streaky

19,311 posts

250 months

Sunday 25th June 2006
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Photograph and short article in yesterday's Daily Mail (SWMBO buys it!) showing a 50, 40 (on road) and 30 signs within 100 or so yards of each other. Confused? You will be, by this week's episode of ... (for those who remember) - Streaky

Flat in Fifth

44,226 posts

252 months

Monday 26th June 2006
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streaky said:
Photograph and short article in yesterday's Daily Mail (SWMBO buys it!) showing a 50, 40 (on road) and 30 signs within 100 or so yards of each other. Confused? You will be, by this week's episode of ... (for those who remember) - Streaky

Where was this S? Wild and wolly Worcestershire by any chance? If not I have another example.

10 Pence Short

32,880 posts

218 months

Monday 26th June 2006
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As has been said, on motorways you generally get at least 1 mile notice of roadworks, then 3/4 mile warning of speed limit change. If someone decides to use the last 5 seconds of their approach to lose speed, rather than the preceding 40 seconds +, they'll get no sympathy from me.

Flat in Fifth

44,226 posts

252 months

Monday 26th June 2006
quotequote all
Well actually I can cite a case where the limit 'technically' goes from 70 to 20, AND there is no warning at 3/4 mile.

To be fair only a muppet would actually BE doing 70 at the point they round the bend and confronted with the 20 markers but that is besides the point. Quite in order to have pegged it back to around 50.

Not so clear cut now is it?

10 Pence Short

32,880 posts

218 months

Monday 26th June 2006
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Is that on a motorway, though?

Flat in Fifth

44,226 posts

252 months

Monday 26th June 2006
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10 Pence Short said:
Is that on a motorway, though?

Yes! link road between two motorways.

tigger1

8,402 posts

222 months

Monday 26th June 2006
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Flat in Fifth said:
10 Pence Short said:
Is that on a motorway, though?

Yes! link road between two motorways.


And is that a "limit" or an "advisory" max speed on a tight bend? Madness if its a limit.

Flat in Fifth

44,226 posts

252 months

Monday 26th June 2006
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tigger1 said:
Flat in Fifth said:
10 Pence Short said:
Is that on a motorway, though?

Yes! link road between two motorways.


And is that a "limit" or an "advisory" max speed on a tight bend? Madness if its a limit.

trust me on this tigger it was a limit, red roundels white background black 20, genuine 20 limit signs, I have no idea if the traffic order itself was valid.

But as you say madness, especially considering the position.

10 Pence Short

32,880 posts

218 months

Monday 26th June 2006
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It's not the slip between the M25 anti clockwise and the NB M11 is it?

havoc

30,158 posts

236 months

Monday 26th June 2006
quotequote all
tvrgit said:
Vaux said:
vonhosen said:
With roadworks you will generally get a 3/4 mile warning to the reduction.

Only helps if you look though. Yesterday a nasty RTC on M56 J12 coming into a SPECS monitored 40 mph - always get a lot of heavy braking at the 40 signs (although the cameras are a few hundred yards away). Mercedes got it very wrong and ended up parked on its side up the verge in the trees.
I can't help thinking a more gradual speed reduction would ease the traffic flow.

Doesn't policy pander enough to idiots already then?

Agreed. Van driver was an idiot. Should be prosecuted for dwdcaa. Don't give the authorities any more excuses for dumbing the roads down further.

Flat in Fifth

44,226 posts

252 months

Monday 26th June 2006
quotequote all
10 Pence Short said:
It's not the slip between the M25 anti clockwise and the NB M11 is it?

No yam yam territory (Black Country-ish)

General area Scraghetti junc for want of a more precise explanation.

10 Pence Short

32,880 posts

218 months

Monday 26th June 2006
quotequote all
I know where you mean!!