its as busy as ever here (edinburgh, scotland). i drive from linlithgow to edinburgh and back every day (35 miles round trip). It takes roughly 45 minutes each way, though i made it in 35 minutes one day when it was very quite.
i average about 23 and a bit MPH therefore.
my car is an old (1996 january) renault laguna 1800cc 8valve, and i drive pretty gently (i stick to 55 mph), and i get around 35MPG which isnt bad i suppose. with petrol at about 80 pence, i get 100 miles for £10 roughly. However, its now up to 86 pence (was 79 pence about 3 months ago), and i get less now. I think 86 pence equals about £3.90 per gallon (4.55 litres per gallon in UK). In US $ this would then be :- $7.30 ish i think? (using about £1.89 per $1.00).
I do about 1000 miles per month - so i spend just a bit over £100 per month on petrol. After end of August, i'll no longer have this job and will work very near home though, which will save about £80 per month in petrol..
People here wouldnt stop driving to work unless petrol went a LOT higher - i'm talking about £1.50 per litre or more. Most people have a lot of spare cash/credit which they spend on booze, take aways and holidays and if forced, they'd give all that up and spend it on petrol. Problem then is - no economy as no consumer spending, as we all know.