1) Canalisation 2) Canalization 3) Channelisation 4) Communication circuit 5) Direction 6) Management 7) Road junction type 1) Channelisation 
[roads] Channelization is an engineering concept which employs the use of secondary roads to separate certain flows of traffic from the main traffic lanes. This method came into favor in the United States in the 1950s. ...
The process of changing and straightening the natural path of a waterway.
Engineering watercourses by straightening, widening, or deepening them so water will move faster. Wh
[n] - management through specified channels of communication
The process by which humans deepen and straighten natural streams, converting them into water-filled ditches. Theoretically channelization controls flooding along the stream, but it destroys the stream ecosystem and often increases flooding downstream.
Straightening and deepening streams so water will move faster, a marsh-drainage tactic that can interfere with waste assimilation capacity, disturb fish and wildlife habitats, and aggravate flooding. 
channelisation noun management through specified channels of communication