  Continuous-Flow Intersections (CFI), also known as Displaced Left-Turn (DLT)
intersections, aim to improve the efficiency and safety of traffic junctions. A
CFI introduces additional sub-intersections upstream of the main intersection
to split the left-turn flow from the through movement before it arrives at the
main intersection, decreasing the number of conflict points between left-turn
and through movements. This study develops and examines a two-step optimization
model for CFI traffic signal control design and demonstrates its performance
across more than 300 different travel demand scenarios. The proposed model is
compared against a benchmark state-of-practice CFI signal control model.
Microsimulation results suggest that the proposed model reduces average delay
by 17% and average queue length by 32% for a full CFI compared with the
benchmark signal control model.
