>>1691987>>1691989Projections out to 2045.
The wider issue of congestion is how traffic consistently enters the transport network at one fixed location at a certain time, and exits at another fixed location. The problem might be a too-small connecting route (like Hoover Dam/Boulder City and the I-11/US-93 bypass), but that's not the most common case.
>>1691986*thousands of lane-miles of interstate