20mph speed zones
- Thread starter just jim
- Start date
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GrasB
Veteran
- Location
- Nr Cambridge
Unfortunately there's precious little real information in that article, it's more like a blurb. I'm also a little circumspect about the department this research has come from but that doesn't mean the research isn't valid.
Much more interesting would be to see where the areas were that 20mph limits where applied & if this lasted longer than an 'novelty period'. There's no point in blanket 20mph speed limits where it has no relevance as all you'll do is alienate the driving population & devalue the importance of 20 limits when they really are appropriate. That said I'm for 20mph limits in residential areas.
Much more interesting would be to see where the areas were that 20mph limits where applied & if this lasted longer than an 'novelty period'. There's no point in blanket 20mph speed limits where it has no relevance as all you'll do is alienate the driving population & devalue the importance of 20 limits when they really are appropriate. That said I'm for 20mph limits in residential areas.
http://www.tfl.gov.uk/assets/downloads/20-mph-zones-and-road-safety-in-london.pdf
this study was commissioned by TfL and the writers point out repeatedly that London is a special case, as car ownership is lower, and the use of public transport is higher. However studies from around the UK all bear out the conclusions - not least the study in Hull.
The areas are mostly in zone 2 - althought the greatest single concentration is in Kingston. The effects seem to be permanent.
this study was commissioned by TfL and the writers point out repeatedly that London is a special case, as car ownership is lower, and the use of public transport is higher. However studies from around the UK all bear out the conclusions - not least the study in Hull.
The areas are mostly in zone 2 - althought the greatest single concentration is in Kingston. The effects seem to be permanent.
numbnuts
Legendary Member
- Location
- Gone over the hill and far away
Not against, but car engines were not built around a 20mph speed limit would they not produce more harmful emissions as the engine would not reach it’s full working temperature.
GrasB
Veteran
- Location
- Nr Cambridge
The engine will reach full operating temp, low speed + higher rim = slightly faster warm up in general but it'll mean people are driving in lower gears so thus lower fuel economy & more emissions.
depends how they're driven. Given the frequency of junctions on residential roads, accellerating from zero to 30 and then braking again every few hundred yards will be less efficient, and noisier.
The study reports that 20mph zones are popular with residents.
The study reports that 20mph zones are popular with residents.
GrasB
Veteran
- Location
- Nr Cambridge
Noise has way to many factors, the gearing, the engine, how good the driver is at throttle control, amount of engine vibration at low rpm etc..
On residential roads I rarely get up to 30 anyway, there's to much going to. But then again, I view the speed limit as the maximum NOT a target to get to ASAP.
On residential roads I rarely get up to 30 anyway, there's to much going to. But then again, I view the speed limit as the maximum NOT a target to get to ASAP.
Davidc
Guru
- Location
- Somerset UK
Bring back the man with the red flag.
Motor vehicles in urban areas are dangerous. Appropriate speed limits are the only way to mitigate that danger. Why does the limit have to be as high as 20mph?
Motor vehicles in urban areas are dangerous. Appropriate speed limits are the only way to mitigate that danger. Why does the limit have to be as high as 20mph?
snorri
Legendary Member
- Location
- East coast, up a bit.
Car manufacturers are failing to design for our 21st century road conditions.GrasB said:
joolsybools
Well-Known Member
- Location
- Scotland
Have you seen the comments in the 'have your say'?
http://newsforums.bbc.co.uk/nol/thread.jspa?forumID=7334&edition=1&ttl=20091211122207
I think we need a few more pro-cycling comments in there please folks!
http://newsforums.bbc.co.uk/nol/thread.jspa?forumID=7334&edition=1&ttl=20091211122207
I think we need a few more pro-cycling comments in there please folks!
IMO narrow residential streets should be 10mph, wider residential areas 20mph (shopping streets out of town centre etc) with 30mph only for arterial routes in and out.
I think if people were driving at a lower speed more consistently it would increase traffic flow and reduce emissions.
Also if driving was slower it might encourage more people to walk and cycle for short journeys which will have a beneficial effect on the environment.
I think if people were driving at a lower speed more consistently it would increase traffic flow and reduce emissions.
Also if driving was slower it might encourage more people to walk and cycle for short journeys which will have a beneficial effect on the environment.
thomas
the tank engine
- Location
- Woking/Norwich
That's all well and good, but you don't need any formal training to walk to the paper shop.
OP
OP
just jim
Guest
joolsybools said:
Speak Your Braynes candidate:
"The answer is not a lower speed limit, but less people on the roads, but if Labour are going to encourage tens of thousands to immigrate here every year, there will soon be no housing, no space, no jobs and even more people on the roads!"
gaz
Cycle Camera TV
- Location
- South Croydon
well if anyone cares about emissions and fuel economy then just stick it in 3rd and the car will be pretty much idling as your doing 20.GrasB said:
