The Wisconsin State Trunk Highway System is the state highway system of the U.S. state of Wisconsin , including Wisconsin 's segments of the Interstate Highway System and the United States Numbered Highway System , in addition to its other state trunk highways .
The Wisconsin State Trunk Highway System is the state highway system of the U.S. state of Wisconsin . 
 The system includes Wisconsin 's segments of the Interstate Highway System and the United States Numbered Highway System , in addition to its other state trunk highways .