Updated all tables to include increased designation of the western portion of I-86 in New York to Exit 56.

Updated Methodology page to reconcile numerical differences between the change table and the main tables.

Updated all links on the Methodology page.

Reformatted all tables with borders and better font size for better viewing.

Updated all tables to include Interstate 840 in North Carolina.

Updated all tables with new Interstate 294 mileages to include I-80/I-294 concurrency

Updated all tables with new Interstate 73 mileages due to opening of southwest portion of Greensboro Urban Loop

Unfortunately, due to bandwidth limitations, table format was changed from Excel 2003 to HTML.  Although the new format is not as clean, all the information is still contained therein.

Added update page

Re-sorted Table 1 so all totals are at the end of all route entries (instead of having states that begin with letters after T come after the total)

Updated estimated mileage of I-435 in all tables to reflect signed duplex with I-29 (additional 3.5 miles per rough measurement in Google Maps)

Updated estimated mileage of all Alaskan interstate highways in all tables to reflect true interstate routings. See this FHWA Map of NHS Routes in Alaska and Alaskaroads.com.  Special thanks to Oscar Voss.