The basic answer is, it is a "highway" marked on a nautical chart, it provides mariners in highly congested area's a set of specific "lanes of traffic" and is usually managed by Vessel Traffic Service or VTS (It's function is very similar to air traffic controllers)
Rule 10 in the link provided below will give you more info.
A separation of powers
It is the overcrowding of shipsusually found in traffic separation schemes.
Curt M. Elmberg has written: 'The Gothenburg traffic restraint scheme'
this is a circuit in which the switch is located before the load in the circuit
R. S. Carstens has written: 'Oxford Street experimental traffic scheme'
Freight Operator Recognition Scheme (FORS) is a plan for London's freights that is responsible for increasing operational efficiency, reducing pollution from vehicles, traffic congestion and cost of business.
They indicate special areas or features such as anchoring, traffic separation, fishnet area, cables or pipelines, military exercise areas, and jetties
aim of antyodya scheme
That scheme is really great. Do not invest in fraud Schemes.
this is a rectangular(tetradic)color scheme,also a square color scheme
Rhyme Scheme
scheme is where you make plans