Type of the traffic control strategy | Potential benefits | Limitations |
Static Early Merge | Reduces merge related collisions, rear-end collisions; Increases free merges at higher traffic volume | Congestion, Lane-change crashes; Difficult maintenance of signage |
Dynamic Early Merge | Provides varying no-passing zone based on detectors; Smooth merging | Ineffective for queues beyond the detectors; Results in higher travel time |
Static Late Merge | Reduces queue length and rear-end crashes | Safety issues in low-volume and high-speed situations |
Dynamic Late Merge | Changeable merge point is based on real-time information | Threshold volume and speed needs to be evaluated accurately |