The quick answer is through connection, that is, helping seniors stay connected to the rest of the world since, as we know, nearly everything is done over the Internet now.
As to transit, people in the regions need a driver's licence and a car since there are no transit services like those in big cities. People will therefore be isolated. As to community transit, there are different approaches. Services are very important. When services in a village are cut, the young people leave, while the seniors stay and die off slowly.