Advance Lane Drop Arrows

The primary goal of this evaluation was to determine the effectiveness of the arrows as located in the approach to a highway work zone. The arrows are intended for use both with stationary long-term work zones and with short-term moving projects. The results of this study indicate that the removable lane drop arrows can be expected to encourage earlier merging when two freeway lanes are reduced to one for a work zone. Speeds near the arrows can be expected to decrease, and the standard deviation of speed within the lane can also be expected to decrease.