Not much thought goes into roads, but they are very important. Roads will be laid out in a manner that would make sense. New cities will have relatively straight roads to make things easier to drive on. All public roads will require a sidewalk. This will allow a pedestrian to safely walk along the same path as the automobile. The only exception will be freeways, and toll roads. These roads will not have any sidewalks as it is not expected that a pedestrian should be walking on those particular roadways.
Roads will have buildings which will include homes, commercial and mix-use buildings. These roads will have manhole covers to access utilities such as electric, and communication lines. In any new city, there will not be any gas lines. This is to reduce the dependency on natural gas, and oil for general consumer usage. In the event of water, and sewage lines, these will inevitably go under the road to allow for a consistent path to go along. If there is a water main break, or a sink hole, the water authority will be responsible for fixing the broken lines.
New roads and sidewalks will have in-ground radiant heating. This will melt snow and ice from the roads and sidewalks. The water generated will go into water drains for treatment with the water authority. This will obviously increase the cost per km for new roads, and repairs, but the benefits outweigh the consequences. Imagine even with snow, that there will be minimal snow and ice on the roads. This will reduce automobile accidents, and therefore improve safety.
And even though sidewalks are public property, the property owner against the public sidewalk will be partially responsible for the in-ground radiant heating system. The property owner benefits by not having to shovel, and salt the sidewalks that they are responsible for. This will cost extra for running the in-ground heating system, but these costs can be passed on the vehicle registration process. Also, vehicles that still use petrol fuels to power their automobile will pay a little more on the taxes of the fuel. This extra tax cost will be to run the heating system. Electric vehicles not using petrol fuels will have a higher registration cost to help contribute to the system.