I looked at the public transit options and this is probably more important in the long run for people to go carfree.

1. Expanding the Metro -- This is key and will be very costly because Seville has an underground Metro line. It's 11 miles long and I can just imagine how much was spent. However, you don't need to have an underground lMetro. All that's needed is removing car lanes giving a lightrail line it's own right of way. I can see they started this but it needs to be expanded.

Bus -- This is what impressed me the most. They have bus routes that cover the entire city. You're never more than a mile from a bus line. The vehicles are well maintained but I didn't see any bike racks. Service does end after 1 - 2 in the morning.

Overall, it would be easy to live carfree in Seville. Sell your vehicle and find a place to live within 1 mile of the Metro and you're carfree for life.

Oh, I almost forgot, use the new bike lanes too!