It would be nice if there are setting in sanbox mode to control the residential cars spawning or at least make it less, yesterday I did experiment and found an odd, The inhabitant house capacity is not balanced with cars it spanwns, 5 TTT residence with average of 30-50 people could spawn 50-80 cars in just one minute? (no time speeding). makes small town to be looks like a metropolis with those thousand car, its not makes sense even in real life.
Hope this to be considered in upcoming updates
