  A recently proposed paradigm for vehicular traffic in the era of CAV
(connected and automated vehicles), called TrafficFluid, involves lane-free
vehicle movement. Lane-free traffic implies that incremental road widening
(narrowing) leads to corresponding incremental increase (decrease) of capacity;
and this opens the way for consideration of real-time internal boundary control
on highways and arterials, in order to flexibly share the total (both
directions) road width and capacity among the two directions in dependence of
the bi-directional demand and traffic conditions, so as to maximize the total
(two directions) flow efficiency. The problem is formulated as a convex QP
(Quadratic Programming) problem that may be solved efficiently, and
representative case studies shed light on and demonstrate the features,
capabilities and potential of the novel control action.
