The real something for nothing

[Spongebob]

At work.

 Well.... there's also the possibility of adjusting urban planning. The classic "Arcologies" of Sci-Fi come to mind.

 And/Or invest in trains, trams, taxis and 'Ubers' too boot to move people around.

 Bring back the "Age of sail" ! Let's see great ships like the 'Tea clippers' racing the waves again!  

Compelling ideas but people are not keen on inconvenience.  I'm a big fan of mass transit but it just doesn't work well in non-urban areas, so it's kind of a non-starter.

There are a lot of disruptive ideas about transportation that have been suggested with the advent of automated vehicles.  Automated "Ubers" you could call them, but I don't see this as a reduction in energy use due to travel so much as a shift in vehicle ownership unless you could get people to ride share.  That could increase efficiency significantly, but people have always hated carpooling.