Majrdnet -- U.S. Major Road Net

10 descriptive fields. Identifies interstate and U.S. highways and some additional transportation network routes.

Fields:
(1) Descrip -- The descriptive name for the road segment. 

(2) Sign1 -- A composite field that identifies the type, sign route numbers, and a qualifier. 

type:  (blank) - not signed,  I - Interstate,  U - US Route,  S - State Route,  O - Off-Interstate Business Marker,  C - County Route,  T - Township,  M - Municipal,  P - Parkway or Forest Route Marker, N - None of the above

qualifier:  (blank) - No qualifier, not signed, or not applicable,  A - Alternate Route,  B - Business Route,  P - Bypass,  S - Spur,  L - Loop,  F - Proposed (future),  D - Temporary (detour),  T - Truck Route,  N - None of the above

(3) Sign2 -- A composite field for the secondary identifier including the type, sign route numbers, and a qualifier. 

(4) Sign3 -- A composite field for a third identifier including the type, sign route numbers, and a qualifier. 

(5) Miles -- The length of the road segment in miles. 

(6) Km -- The length of the road segment in kilometers. 

(7) Toll -- Links which have one or more toll features. 
	0 - Not a Toll Road,  1 - Toll Road

(8) Lanes -- Number of through lanes in both directions. 

(9) Median -- Describes the type of median of the road feature. 
0 - Unknown
1 - Divided Highway
2 - Undivided Highway

(10) Func_class -- Assigned functional class description.