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The National Network is a U.S. government-designated system of highways originally established by the Surface Transportation Assistance Act of 1982. This routing option is based on the federally-designated National Network system updated in the April, 1992 Code of Federal Regulations, Part 658, Appendix A. The National Network includes the Interstate System (several minor segments are not included), and many selected US and state highways. Highways continue to be added to the National Network by federal and state governments.
eMILER National Network routing represents distances and driving routes that are most reasonable and legal for larger trucks authorized by the Surface Transportation Assistance Act of 1982.
National Network routing stays on the National Network to the maximum extent possible. Considering that many areas are not directly served by the National Network, the origin and stop-offs of your route may not be on the National Network. In these cases, eMILER will take the shortest reasonable path from the origin and stop-offs to the Network. eMILER National Network routing will flag with a question mark (?) any road segments not designated as National Network in the Directons report. Those road segments should be checked before travel.
National Network distances tend to be higher than Shortest or Practical routings.
These designated highways permit, at a minimum, 102" wide, single 48 ft. trailers and tandem 28 ft. trailers. The Interstate system and most, but not all, remaining designated routes are open to 80,000 lb. vehicles. Certain states, notably Arkansas and Mississippi, have designated certain National Network segments with less than an 80,000 pound capacity.
In addition to the National Network highways, access routes and access policies are components of routing STAA dimensioned trucks. The Federal government has mandated that no state may prohibit travel from the National Network for a minimum of one road mile unless safety restrictions apply. Additionally, no state may deny reasonable access to terminals and facilities for food, fuel, repairs and rest.
Several states maintain more generous access policies and lists of specifically designated access routes to terminals and facilities. (See the access policies on-line Help topic for the current status of access policies. For detailed information about pre-approved access routes, contact individual states). Should you need to travel beyond the National Network and beyond the access roads, you must acquire the proper permit.
NOTE: These suggested National Network routings are based on official highway maps, the Code of Federal Regulations, and information provided by state governments. It is provided without a warranty of any kind. The user assumes full responsibility for any delay, expense, loss, or damage that may occur as a result of its use.
ALSO NOTE: There are no National Network road segments in Mexico and Canada.