This blueprint book features [font=default-bold]12[/font] four way interchanges and [font=default-bold]3[/font] three way interchanges based on real life designs such as the cloverleaf and dumbell interchanges featured all over the world. The book also features some unique interchanges like the pinavia and braided intersections. -- Key -- [item=transport-belt] Capacity/throughput [item=electronic-circuit] Cost [item=small-electric-pole] Size [virtual-signal=signal-4] Arms