Predictable routing is the concept of using prespeci ed patterns to route a net. By doing this, we allow an more accurate prediction mechanism for metrics such as congestion and wirelength earlier in the design ow. Additionally, we can better plan the routes, insert bu ers and perform wire sizing earlier. With comparable routing quality, we show that we can predictably route up to 80% of a selected subset of nets. Also, we introduce methods for nding a group of nets which can be predictably routed.