adam2 wrote:In many cases public transport is more expensive per mile than petrol is, so I doubt that this will result in less car commuting.
Fares are in many cases incresing significantly.
There are many costs apart from petrol of course, but many people consider a car essiential for when the public transport system is shut for bad weather or strikes.
Therefore having met the fixed costs of car ownership for strikes and bad weather, the marginal cost of petrol compares favourably with fares.
Local bus fares in London are now £2, that would buy about 1.5L of petrol, which would take one many miles in a small car.
The bus fare would of course be £8 for 4 persons but the petrol consumption would only increase very slightly if 4 persons rather than 1 used a car.
Bus fares for any trip in London have been £1.30 for the last year, with a daily cap of £3.90 or so.
Nobody in London buys a car for "when the public transport system is shut for bad weather or strikes". Because people cannot get to work using a car (unless they happen to be the CEO or other main board director, with their name painted on a private parking space). Once you've paid your £8/£10/£12 daily congestion charge and you actually get there (at 6-7mph if you're very lucky), there is nowhere to park! (Well, there's private sites charging £30-40 per day, or street parking at £4.40 per hour if you employ someone to illegally feed the meter/drive your car around. So you'd be forking out in 2011 at least £880 a month to shift and park the car *without petrol*.)
They buy a car - invariably - to go to the supermarket. Everyone says, "I have to have a car to go to the supermarket". Although it would almost certainly cost them less to get a taxi back from the supermarket each time. So cost clearly does not figure in their equations that much.