The answer lies in separating the noun (coast or coastal) from the prefix (inter or intra.)In English, a prefix is added to the beginning of a word to modify its meaning. Intra- is a prefix signifying inside, within, interior, during. Inter- is a prefix signifying among, between, amid, during, within, mutual, reciprocal.Therefore, an "Intracoastal waterway" can be said to be an "inside-the-coast" or "within-the-coast" waterway. An "Intercoastal waterway" would be an "among-the-coast(s)" or "between-the-coast(s)" waterway.More to the point; the Atlantic Intracoastal Waterway is a protected waterway totally within the coast of the United States. The fact that it also lies in, between and among several states (Interstate in other words) is unrelated to to the fact that it is within the coast. The confusion arises due to the extensive, and commonly called, "Interstate" highway system in the United States which runs among and between the several states.
The Intracoastal Waterway (ICW) is the system of bays, rivers, lagoons, and canals that runs along the Atlantic and Gulf coasts of the US. Intercoastal is a misnomer perpetuated by people who mistakenly believe the waterway is named like the Interstate Highway System. Even though the ICW goes between (inter-) states, it is entirely within (intra-) the US inland coastal region.
There isnt a difference between interstate commerce and interstate commerce.
Intrastate commerce is that business that is conducted between business entities that exist within the same state, while interstate commerce is that which is conducted between businesses located in differing states.
In interstate employment someone could work between one or two states, however in instate employment someone would just be working in that said state.
The waterway that became a vital link between Britian and India is the Suez Canal.
The waterway cave is between the inn and the clinic
Any road may be a highway, an Interstate is larger and usually funded by a federal government
Interstate refers to activities or transactions that occur between two or more states, while intrastate refers to activities or transactions that occur within the boundaries of a single state. The key distinction is whether the activity crosses state lines or not.
Rideau canal
A waterway between the Mediterranean and the Red Sea
The Windward Passage!