Don't forget that there are many facets to transport policy … in my local CA (and I suspect others are similar), the policy for several years now has included things like:

• Planning changes so that housing/shops/jobs/facilities etc. are placed closer together so much more daily activity can be achieved without needing vehicles. (Probably the least well implemented so far and probably the most long-term - but still on the cards and likely to carry much more weight in future)
• Discouraginging private car use for short/local journeys and encourage ‘active’ travel (walking/cycling) and public transport - e.g. by reallocating road space to public transport/cyclists/pedestrians.
• Attempting to improve public transport (the new regional mayors are now starting to get powers to make very significant changes to the local transport systems after decades of central government rules that set more store on competition between private companies than providing an integrated transport system, so expect much more significant changes in the future)
• Converting the remaining vehicles to low/zero emission

There are lots of drivers for such policies - not just CO2 emissions, but also road safety, local air quality, congestion/economics, population health/exercise levels, quality of community spaces, social inclusion, and so on - but they all point to needing far fewer private cars in the future and those having lower milage.

   - Andy.

Don't forget that there are many facets to transport policy … in my local CA (and I suspect others are similar), the policy for several years now has included things like:

• Planning changes so that housing/shops/jobs/facilities etc. are placed closer together so much more daily activity can be achieved without needing vehicles. (Probably the least well implemented so far and probably the most long-term - but still on the cards and likely to carry much more weight in future)
• Discouraginging private car use for short/local journeys and encourage ‘active’ travel (walking/cycling) and public transport - e.g. by reallocating road space to public transport/cyclists/pedestrians.
• Attempting to improve public transport (the new regional mayors are now starting to get powers to make very significant changes to the local transport systems after decades of central government rules that set more store on competition between private companies than providing an integrated transport system, so expect much more significant changes in the future)
• Converting the remaining vehicles to low/zero emission

There are lots of drivers for such policies - not just CO2 emissions, but also road safety, local air quality, congestion/economics, population health/exercise levels, quality of community spaces, social inclusion, and so on - but they all point to needing far fewer private cars in the future and those having lower milage.

   - Andy.