Now the cost is an issue - in the UK driving is almost invariably cheaper than taking the train, even when going solo. When taking any passengers with you driving will win every single time, sometimes it's even worth renting a car for the journey and it will still be cheaper than the train.
Depending on the route, I could see those numbers being reversed in the UK and Europe; intercity trains are fast but pricey, even allowing for the much higher fossil fuel taxes.
Commuter trains are a similar story; while it's expensive and unpleasant to commute into central London by train, doing it by car will be even slower, incur the congestion charge, and there's nowhere to park.
- In Belgium you can ride from anywhere in the country to anywhere else for 7.5€ (if you buy a prepaid ticket for 10 rides), which is hard to beat even with a car with great mileage.
- In Portugal, you can go from Lisbon to Porto for 15€ (buying a couple weeks in advance). By car, that won't even cover the tolls.
I like having a car - but not for commuting into the center of a city!
In the US, I guarantee you that the vast majority of people have never been on a train. In a few select cities the number will drop if you include subways and other commuter trains, but the general conclusion is the same.
I rather be on the road but a train was cheaper than spending money on tolls plus gas. Saving money then was a necessity for me.