| Topic: | Re:Re:Re:Re:Re:Re:LTNs and the definition of a residential road | |
| Posted by: | Tom Pike | |
| Date/Time: | 04/01/23 19:19:00 |
| I gave figures for both 2020 and 2021 precisely because the latest numbers for 2021 are going to be affected by the pandemic! For both years emissions from cars were considerably higher than for aviation, 2.9 times in 2019 and 3.6 times in 2020. I would expect in 2021 the multiple will be somewhere in between, but that doesn't make much difference to the relative contribution. It's certainly odd for Simon to suggest that we're better off shutting down Heathrow completely rather than tackling the emissions from our cars that are five times larger. We need to cut emissions from both, and LTNs could achieve a significant proportion if they were rolled out widely. The figures Michael posted from the Camden LTN give a 26% reduction in traffic counts, that's both on the boundary roads (17%) and inside the LTN (54%). Simon dismisses LTNs as giving a significant reduction in emissions, but if other schemes achieved the same drop in traffic volumes across the UK, that would amount to an 18 million tonne reduction in CO2 just from cars. For comparison Heathrow's share of UK emissions was about 13 million tonnes of CO2. In fact we already know that such reductions are consistently achievable. These latest Camden LTN figures are very similar to the traffic reduction reported for three different LTNs in the paper published by Imperial researchers last month, 58% inside the LTN, 13% outside. These are encouraging results in terms of suggesting a viable way to cut our share of CO2 emissions. |