1. When it comes to traffic congestion in cities, you can usually think of lack of roads ortoo many cars in one avenue, causing it to be jammed.
2.Sensing the amount of traffic on main roads and giving priority to those who have more of it.
Another solution may be transforming two way roads/streets into one way roads/streets to minimize the amount of time spent on traffic lights.
3. A machine learning algorithm can be used to relieve bottle necks and checkpoints to have access to better information about car routes
4. Some limitations that come to mind when thinking of making new roads are the costs and space usage of the new ones, taking space that could be used for buildings
5. Using technology to access more reliable data and machine learning to control traffic lights to reduce bottlenecks