As used in this part:

1. (1) “AASHTO” means the American Association of State Highway and Transportation Officials;
2. (2) “ARDOT” means the Arkansas Department of Transportation;
3. (3) “ASTM” means the American Society for Testing and Materials;
4. (4) “FHWA” means the Federal Highway Administration;
5. (5) “MUTCD” means the Manual on Uniform Traffic Control Devices;
6. (6) “Scenic Byway” means the designation given a state highway that possesses the scenic qualities and cultural heritage that would be of interest to the road user which would encourage economic enhancement through additional tourism activities;
7. (7) “SHRP” means the Strategic Highway Research Program;
8. (8) “Sight distance” means the distance a vehicle operator can see around or over horizontal or vertical curves of a roadway;
9. (9) “Trailblazing” means supplemental signing of secondary or off-main roadway routes;
10. (10) “U.S.C.” means United States Code; and
11. (11) “Zoning” means the delineation of “Passing” and “No Passing” areas of a roadway with respect to conditions of that roadway.