| Topic: | Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:20mph Red Route Limit for London | |
| Posted by: | N V Brooks | |
| Date/Time: | 09/06/19 11:33:00 |
| Add to this, the fact that lower limits mean that cars will invariably be incapable of having the correct gear selected resulting in higher CO2 and particulate output. Almost ten years ago The Guardian reported on this. https://www.theguardian.com/environment/2010/apr/19/ask-leo-20mph-speed-limits-pollution The problem is not, of course, replicated in alternative fuel vehicles but these currently represent less than 8% of total UK vehicles (source VOSA). Some intersting figures from 2009 30mph/20mph/ petrol car consumption figures Steady 30mph (4th gear): 60.7 mpg (small petrol car), 55.6 mpg (medium petrol car) = 58.15 mpg (average) Steady 20mph (3rd gear): 55.5 mpg (small petrol car), 49.1 mpg (medium petrol car) = 52.3 mpg (average) Higher consumption of fuel equals higher CO2 and particulate output. |