Well, that’s a matter for debate. By how much did road traffic grow between 1997 and 2010?!
Between 2000 and 2010 road milage grew by 4.7%, however there had been three consecutive years of falling milage:
Statistical Release – Annual road traffic estimates - Page 2 of 8
1. Road Traffic in 2010
The annual estimates show that:
In 2010, the overall motor vehicle traffic volume in Great Britain was 1.6 per cent lower than in 2009, at 303.2 billion vehicle miles.
This follows a 0.9 per cent year on year fall between 2008 and 2009, and a 1.0 per cent fall between 2007 and 2008. Motor vehicle traffic has fallen for three consecutive years for the first time since records began in 1949. However, traffic levels in 2010 were 4.7 per cent higher than in 2000
Digging further (TRA0101):
Data on road traffic by road and vehicle type, produced by Department for Transport.
www.gov.uk
Confirms a growth rate of 8.36% from 1997 to 2010.
Conversely 2010 to 2022 had seen growth of 6.79% - although the mileage rates for 2022 are still below those in 2019, so are likely to be due to the significant change in working patterns due to COVID and so nothing to do with government policy.
It should also be noted that this is for 1 year less than the 1997 to 2010 period is long and if you changed it to 1998 to 2010 to match the same period length growth falls to 6.42% (it's more reasonable, if the purpose is to compare political party policy, to remove the first year than the last year as the first year would be more likely to be linked to the previous administration).
To illustrate this if we look at the 10 years (2012 to 2022) we see a rate of growth of 6.3% compared with 4.7% between 2000 and 2010.
Hopefully that answers your question.
The above assumes there’s no further mission creep. I don’t trust our political system at the moment.
What mission creep are you concerned about?
ULEZ expanding out of London? That could only happen with national government support or at local level. That's unlikely to happen in the next 2 years, by which point a while load of non compliant cars will have been scrapped.
ULEZ fees increase? That's hardly mission creep, however again it's not something which would impact all that many and fewer and fewer for each month which passes as cars get replaced.
Congestion charge zone expands? That could happen, however that's not likely in the next 7 months (i.e. before the mayoral elections) and even then it's the sort of thing which is likely to be brought up by someone (for example Tories, trying to win votes of a Labour mayor, may ask the question thinking that being anti ULEZ won them a recent election - so let's put some clear water between us and them by asking the question). If it's denied by someone, it's likely to be off the table for at least 18 months after the election of they win. Again it's unlikely within the next 2 years.
What else are you concerned about?