definition
strict definition
control point
A point in a transport network for checking or guiding travelers and vehicles, collecting fees, or requiring identification.
A control point is a point in a transportation network where travelers or vehicles are checked, guided, or must pay a fee or present identification.
The control concerns passage through the network. A check, payment, or instruction can occur at the point without it being the traveler's destination.
A node concerns entry or route interchange. The control-point distinction instead concerns the check or direction applied to movement through the network.