Some time ago I produced some pictures of a linear city. It looked rather like a huge greenhouse and attracted some criticism. These pictures show a modified city with separate buildings, town centres and rather more variety. I hope they are self-explanatory.
Just like the earlier version this city copies Manhattan. It is only 2 miles wide but it is as long as required.
The aim is to house millions of people but ensure that none are more than a mile from open countryside. Public transport is provided in the form of trams and trains. Cycleways are built into the city from the outset. Housing density is high so that distances are short. Energy consumption on travel and home heating will be less than 20% of current UK average levels. At that level renewable energy could meet the need, making the city effectively zero carbon.