| Topic: | Re:Re:Re:Re:Re: Tom Pike. | |
| Posted by: | Tom Pike | |
| Date/Time: | 05/01/23 18:38:00 |
| Traffic in London in 2021 was 9% below both 2017 and 2019 levels according to DfT traffic counts. The TfL figures also give exactly the same difference for 2021 as well as providing a figure for traffic for each day. The actual traffic flows on these three roads was 14% lower averaging by road, and 19% lower on total traffic counts. That's very similar to the reduction seen for the boundary roads for both the Islington and Camden LTNs. The Chiswick Bridge and A4 counts are from automatic counters that operate continuously, so the annual averages directly calculated by DfT can be compared to the average annual figures for London. Clearly both saw a larger drop in traffic than London as a whole, so there is no evidence of traffic being displaced by LTNs to these locations in Chiswick, rather the opposite in fact. I noticed that Twickenham Road actually has automatic counts for 2020 as well as a manual count for May 20 2021. We can therefore directly compare the counts seen on Twickenham Road to the TfL average for 2020 and the traffic in London on the same day of the count in 2021 after the LTN was introduced. The TfL figures give a 12% increase reflecting the return of traffic to London by May 2021 from the levels in 2020. The Twickenham Road figures give a 10% increase, so 2% less. That's too small to be confident that's a real reduction from the LTN, but by the same token it offers no support to any claim that the LTN displaced traffic to Twickenham Road. Introducing the LTN seems to have had no significant effect on traffic on this boundary road. The claim that LTNs just displace traffic to the boundary roads seems to be more an article of faith than based on any evidence, and certainly that's the case for the three roads Steve chose that he rather hoped would prove his point. |