Busy roads are busy because of existing demand, new demand can be created by new roads/lanes and cause the expanded roads to become busier, but that's a really good thing not a bad one. New roads should be planned/expanded with that in mind because the moment existing demand starts to exceed what the current roads can handle it becomes time to build new roads or expand existing ones again.
Allowing outdated and inadequate infrastructure to make people miserable and hinder a thriving local economy is a terrible idea. Improving and adapting our roadways to meet the needs of a growing community is exactly what we want cities to do. We shouldn't use induced demand as an excuse to neglect that responsibility, we just have to understand the effect so that we can plan for it.
Allowing outdated and inadequate infrastructure to make people miserable and hinder a thriving local economy is a terrible idea. Improving and adapting our roadways to meet the needs of a growing community is exactly what we want cities to do. We shouldn't use induced demand as an excuse to neglect that responsibility, we just have to understand the effect so that we can plan for it.