So shouldn't the amount of [lanes on] highways be decided by actual physical housing in and out of the employment centers & also coupled with actual rising comm

So shouldn't the amount of [lanes on] highways be decided by actual physical housing in and out of the employment centers & also coupled with actual rising commuter traffic? thats relatively easy to gauge. otherwise not building highway lanes when really needed is just one more 'we've got standards now go make the sacrifices needed to meet them'. not saying cars are the only solution but then there should be some objectively better alternative investment like busses plus improved local connectivity. Also, the time delta between public transportation & car option should be a consideration.