The real problem is that the roads don't seem to be engineered with a "bandwidth" mentality. Instead I see interchanges where 2-3 lanes from a new road are being piped into an existing 2-3 lane road. Did the existing road get expanded to 4-6 lanes? Very rarely, because you would see a lot more 10-20 lane roads running through downtown.

Instead, it seems a lot of "traffic" studies are just minor tweaks around the edge, add a lane or remove a lane from a 4-6 lane main corridor and the traffic patterns basically don't change that much because its massively oversubscribed already.